Stationary Torque Transducers are also called Static Torque Transducers, or Stationary Transducers.
Static torque transducers are compact, robust and maintenance-free, offering many advantages. Sino-Inst’s Stationary Torque Transducers are based on strain gauge technology and provide high-precision signal transmission. Designed to perform static torque measurements and dynamic rotation (limited angles) with high precision in both clockwise and counterclockwise directions.
It is suitable for detecting the torque value of non-rotating body. The maximum deflection angle is ≯360 degrees.
It can enter the working state after turning on the machine, no preheating process is required.
High detection accuracy, good stability and strong anti-interference.
It can continuously measure positive and negative torque without repeated zero adjustment.
Small size, light weight, easy to install.
The sensor can be used independently from the secondary instrument, as long as the +24V power supply is provided according to the pin number of the socket, the current, voltage or frequency signal whose impedance is proportional to the torque can be output.
Stationary Torque Transducer Working principle
The static torque sensor has round shafts at both ends. It is praised by users for its excellent stability, high measurement accuracy, high cost performance and simpler monitoring method.
The measuring elastic body of the sensor does not participate in relative motion. The testing elastic body is subject to relative reaction force. When installing, one end is fixed and the other end is stressed.
Measurement of torque: Using strain gauge electrical measurement technology, a strain bridge is formed on the elastic shaft, and the electric signal of the elastic shaft torsion can be measured by supplying power to the strain bridge. After the strain signal is amplified, it becomes a frequency signal proportional to the torsional strain through voltage/frequency conversion. Or directly output standard 4-20mA current signal and 1-5V voltage signal.
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Stationary Torque Transducers are also called Static Torque Transducers, or Stationary Transducers. Static torque transducers are compact, robust and maintenance-free, offering many advantages. Sino-Inst’s Stationary Torque Transducers are based on…
Sino-Inst is a manufacturer of Stationary Torque Transducers. We offer more than 20 types of torque transducers, 60% are dynamic torque sensors, 40% are stationary torque sensors.
For example: electric motor, engine, internal combustion engine, etc. Can be used to make viscometers.
The application range of Stationary Torque Transducers is mainly used in test systems such as experimental machines and static torque detection.
Sino-Inst’s Stationary Torque Transducers, made in China, have good quality, with better prices. Our Torque Sensors are widely used in China, India, Pakistan, USA and other countries.
Sino-Inst’s entire team is well trained, so we can ensure that each customer’s needs are met. If you need any help with your product requirements, whether it is a Stationary Torque Transducers, level sensors, or other equipment, please give us a call.
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Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Do you know the difference between Pressure Transmitter vs Pressure Gauge? Pressure transmitters and pressure gauges are industrial process instruments used to measure the pressure of media. Understanding the difference between Pressure Transmitter vs Pressure Gauge is something we should do before choosing a transmitter and a pressure gauge. Only in this way can we choose suitable products. Here we explain in detail the difference between Pressure Transmitter vs Pressure Gauge.
A pressure transmitter in the general sense is mainly composed of three parts: a load cell sensor (also called a pressure sensor), a measurement circuit, and a process connection. It can convert the physical pressure parameters such as gas and liquid felt by the load cell sensor into a standard electrical signal (such as 4~20mADC, etc.). Measurement, indication and process adjustment are carried out by supplying secondary instruments such as indicating and alarming instruments, recorders, and regulators.
A pressure transmitter is an instrument that accepts a pressure variable and converts the pressure change into a standard output signal in a certain proportion after being converted by sensing. The output signal of the transmitter is transmitted to the central control room for pressure indication, recording or control.
In fact, there are many kinds of working principles of pressure transmitters. Commonly used pressure transmitters can be divided into piezoresistive, diffused silicon, ceramic, piezoelectric and capacitive pressure transmitters according to the measurement principle of the pressure sensor.
Here, we use the piezoresistive pressure transmitter to introduce the working principle of the pressure transmitter.
The electrical components of pressure transmitters that sense pressure are generally resistance strain gauges.
The resistance strain gauge is a sensitive device that converts the pressure on the device under test into an electrical signal.
The most widely used strain gauges are metal resistance strain gauges and semiconductor strain gauges. There are two types of metal resistance strain gauges: wire strain gauges and metal foil strain gauges.
Usually, the strain gauges are tightly bonded to the mechanical strain-generating substrate through a special adhesive.
When the stress of the matrix changes. The resistance strain gauge also deforms together. Change the resistance value of the strain gauge. This changes the voltage across the resistor.
Pressure transmitter is the most commonly used sensor in industrial practice, and it is widely used in various industrial automatic control environments.
Petroleum/Petrochemical/Chemical
It is matched with the throttling device to provide accurate flow measurement and control.
Measures pressure and liquid level in pipes and storage tanks.
Electricity/city gas/other companies
Places that require high stability and high precision measurement.
Pulp and paper
Used in places that require resistance to chemical liquids, corrosive liquids, etc.
Iron and steel alloys / non-ferrous metals / ceramics
It is used in occasions requiring high stability and high precision measurement such as furnace pressure measurement.
For use in locations requiring stable measurements under strictly controlled (temperature, humidity, etc.) conditions.
Machinery/Shipbuilding
It is used in places where stable measurement is required under strict control (temperature, humidity, etc.) and high-precision conditions.
According to different classification standards, pressure transmitters can be divided into different categories. For example, depending on the type of pressure being measured. It can be divided into static pressure transmitter, absolute pressure transmitter, differential pressure transmitter and so on.
Commonly used pressure transmitters can be divided into piezoresistive, diffused silicon, ceramic, piezoelectric and capacitive pressure transmitters according to the measurement principle of the pressure sensor.
(1) piezoresistive pressure transmitter
One of the main components of piezoresistive pressure transmitters is the resistance strain gauge. It is a sensitive device that converts the strain change on the DUT into an electrical signal. When the stress of the matrix changes. The resistance strain gauge also deforms together. Change the resistance value of the strain gauge. This changes the voltage across the resistor. The transmitter has extremely low price and high accuracy and good linearity characteristics.
(2) Diffused silicon pressure transmitter
Diffused silicon pressure transmitters utilize the piezoresistive effect of elastic elements. When the pressure of the measured medium acts directly on the diaphragm of the sensor. The diaphragm produces a micro-displacement proportional to the medium pressure. Change the resistance value of the sensor.
Compared with traditional products, this transmitter has the advantages of advanced technology, reliable performance, convenient installation, high accuracy and small size.
(3) Ceramic pressure transmitter
Corrosion-resistant ceramic pressure transmitters have no liquid transfer. When the pressure acts on the ceramic diaphragm. The diaphragm deforms slightly. Make the thick film resistor printed on the back of the ceramic diaphragm pass through the Wheatstone bridge (closed bridge) connected to it. Output a voltage signal proportional to the excitation voltage. The pressure physical quantity is measured through the built-in circuit of the transmitter and converted into a unified standard signal.
The transmitter can introduce various media (corrosive and non-corrosive gases, liquids) directly to the ceramic diaphragm. The thermal stability of the ceramic and its thick-film resistance allow it to operate over a temperature range as high as -40°C to 135°C. Therefore, it has high measurement accuracy, good stability, strong output signal and low price.
(4) Piezoelectric pressure transmitter
Piezoelectric pressure transmitters work on the piezoelectric effect. The crystal is anisotropic, and when a force is applied along a certain direction, the crystal can produce an electric effect. When the mechanical force is removed, it will return to the uncharged state again.
The piezoelectric materials mainly used in sensors are quartz, sodium potassium tartrate and ammonium dihydrogen phosphate. The transmitter is mainly used in the measurement of acceleration and pressure. It has the characteristics of simple structure, small size, light weight and long service life. But it can only be used to measure dynamic stress.
The capacitive pressure transmitter is composed of a measuring diaphragm and electrodes on both sides of the insulating sheet to form a capacitor. When the pressure on both sides is inconsistent, the displacement of the measuring diaphragm is proportional to the pressure difference. Therefore, the capacitance on both sides is not equal.
Through the oscillation and demodulation link, it is converted into a signal proportional to the pressure. Then the pressure physical quantity is measured and converted into a unified standard signal through the transmission circuit. With its high precision, corrosion resistance, pollution resistance and good stability, it is recognized as an ideal instrument for detecting low vacuum pressure at home and abroad. It is mainly used in various fields of civil industry, and plays a unique role in military industries such as aerospace industry and nuclear industry.
A pressure gauge refers to an instrument that uses elastic elements as sensitive elements to measure gas, steam, and liquid pressure. It is widely used. It is used in almost all industrial processes and scientific research fields.
The pressure value of gas, steam and liquid measured by the pressure gauge is called gauge pressure.
Gauge pressure is based on standard atmospheric pressure.
Instruments that measure pressure values above standard atmospheric pressure are called positive pressure gauges or pressure gauges.
Instruments that measure pressure values below standard atmospheric pressure are called negative pressure gauges or vacuum pressure gauges.
Instruments that can measure both positive and negative pressures are called pressure vacuum gauges.
It can be seen everywhere in heat pipe network, oil and gas transmission, water and gas supply system and other fields.
Bourdon tube pressure gauges are also known as Bourdon tube pressure gauges. The free end of the spring in the pressure gauge is closed, and it drives the sector gear to rotate through the pull rod.
During pressure measurement, the spring tube deforms under the measured pressure. Therefore, the free end of the spring tube produces a displacement. The displacement is proportional to the measured pressure. The pointer is deflected and the pressure value is indicated on the dial.
If there is atmosphere in the case, the pressure measured by the pressure gauge is positive or negative; If the case is sealed and evacuated, the pressure measured by the manometer is absolute pressure.
When the spring tube pressure gauge is equipped with an isolation device, it can still measure the pressure of high temperature or corrosive, viscous, easy to crystallize and dusty media.
In elastic pressure measuring instruments with high precision (such as above grade), the elastic elements are mostly made of constant elastic alloy or even quartz glass.
Jewel bearings or rolling bearings are inlaid in the shaft holes of the transmission mechanism. The dial scale is long, and some can also be displayed digitally.
Pressure gauges have become a part of applications in various industries. They are used in many industries such as machinery, chemical industry, medical treatment, food, petroleum, shipbuilding, electric power, metallurgy, tap water, water treatment, environmental treatment, and power stations.
Simply put, a pressure gauge is based on atmospheric pressure and is used to measure instruments that are less than or greater than atmospheric pressure.
Commonly used pressure gauge uses are as follows.
1, to monitor the working condition of the medium filled inside the pressurized vessel in operation. in order to properly control the pressurized capacity and protect the safety of production equipment.
2, to understand the state of material changes in the production process. So that certain process parameters are controlled under the given conditions to ensure that the quality of the product meets the requirements.
3、By mastering the pressure parameters. To provide reliable data for the operator to monitor, control and regulate production.
According to different uses, pressure gauges can be divided into: diaphragm pressure gauges, stainless steel pressure gauges, ammonia pressure gauges, magnetic-assisted electric contact pressure gauges, shock-resistant pressure gauges, stainless steel diaphragm pressure gauges and many other types of pressure gauges.
The following is a brief introduction one by one:
(1) Stainless steel pressure gauge
Stainless steel pressure gauges are widely used in petroleum, chemical industry, chemical fiber, metallurgy, power station and other industrial sectors to measure the pressure of various fluid media in the process with high requirements for corrosion resistance and vibration resistance.
(2) Ammonia pressure gauge
The ammonia pressure gauge is mainly suitable for measuring the pressure of ammonia liquid, gas or its mixture in the process of fertilizer production or in refrigeration equipment.
It can also be used to measure the pressure of various non-corrosive, non-crystalline and solidified media such as ordinary carbon steel, austenitic stainless steel, platform metal structural steel, and tin brazing materials.
(3) Magnetic-assisted electric contact pressure gauge
Magnetic-assisted electric contact pressure gauges are widely used in petroleum, chemical industry, metallurgy, power stations and other industrial sectors or in supporting mechanical and electrical equipment to measure the pressure of various fluid media without explosion hazard.
Usually, the meter can be used in conjunction with corresponding electrical devices such as relays and contactors to achieve automatic control and send alarms for the measured and controlled pressure system.
(4) Shockproof pressure gauge
It is used to measure the pressure of gases or liquids that are non-corrosive to copper and copper alloys, non-explosive, non-crystallizing, and non-precipitating.
The biggest feature of the shock-resistant pressure gauge is that it can measure pressure normally in a machine tool or equipment that vibrates violently.
(5) Stainless steel bellows pressure gauge
The stainless steel bellows pressure gauge is a corrosion-resistant micro-pressure gauge developed with reference to the structural characteristics of the original bellows pressure gauge.
Applied to equipment such as boiler ventilation and gas pipelines, to measure the micro-pressure and negative pressure of various gas media in processes with high corrosion resistance requirements.
(6) Diaphragm pressure gauge
Diaphragm pressure gauges are suitable for measuring the pressure or negative pressure of various fluid media with certain corrosiveness, non-solidification or non-crystallization. Corrosion resistance depends on the diaphragm material.
Difference list: Pressure Transmitter vs Pressure Gauge
The difference between a pressure transmitter and a pressure gauge are:
The standard instrument accuracy required for pressure transmitter calibration is much higher than the standard instrument accuracy required for pressure gauges.
The pressure gauge only needs to verify the relationship between a pair of input and output, while the pressure transmitter may need to verify the relationship between input and communication data.
The calibration of the pressure gauge must have the corresponding measurement qualification, and the pressure transmitter is generally not required except for the production plant and new construction.
The precision of the pressure gauge is poor, there is no output, and the manual operator cannot be used. Generally, 5 points are checked, and the back and forth difference is different. The intelligent pressure transmitter generally only needs to calibrate the zero point and full scale.
The output of the pressure gauge is a scale indication, which is displayed by itself. The pressure transmitter is a current output and must be connected to an ammeter of the corresponding accuracy level for display.
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Sino-Inst is a manufacturer of Pressure Transmitter. We offer more than 50 types of Transmitters. Main products include compact pressure transmitters, industrial pressure transmitters, differential pressure transmitters, single crystal silicon pressure transmitters, diffused silicon pressure transmitters , Diaphragm pressure transmitter, high temperature pressure transmitter, explosion-proof pressure transmitter, pressure transmitter, custom pressure transmitter, with remote pressure transmitter, 316 diaphragm pressure transmitter.
Sino-Inst’s Pressure Transmitters are the most commonly used sensors in industrial applications. Widely used in water conservancy and hydropower, railway transportation, intelligent building, production control, aerospace, military industry, petrochemical industry, oil well, electric power, ship, machine tool, pipeline and other industries.
Sino-Inst’s entire team is well trained, so we can ensure that each customer’s needs are met. If you need any help with your product requirements, whether it is a Pressure Transmitter, level sensors, or other equipment, please give us a call.
Request a Quote
Please enable JavaScript in your browser to submit the form
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Pressure Transmitter 4-20mA is the most commonly used one in industrial process control. In industrial process control, the measurement and control of pressure has always been a very important parameter. The 4-20mA output pressure transmitter is widely used due to its own characteristics, such as: good anti-interference performance, less and simple wiring, etc.
Sino-Inst sorted out the corresponding solutions according to the problems that customers often encountered in the process of installing and using this type of pressure transmitter. In particular, it pointed out that this article is aimed at common problems in the use of 4-20mA output pressure transmitters.
When checking whether the pressure transmitter can work normally, the tool we use most is the multimeter. After you confirm the output type of the pressure transmitter (common ones are 4-20 mA current type and 0-10V voltage type) and working voltage and other parameters. You can start the operation.
1. Pressure detection.
For current output type (4-20 mA): Set the multimeter to the current measurement function. And connected to the output loop of the pressure transmitter, connected in series. For voltage output type (0-10V): Set the multimeter to the voltage measurement function. And connected in parallel at both ends of the output of the pressure transmitter.
Turn on the power and record the reading on the multimeter.
For a transmitter with a 4-20 mA output: With no pressure input, a current close to 4 mA should be displayed. At maximum pressure input, a current of approximately 20 mA should be displayed. For a transmitter with 0-10V output: when there is no pressure input, a voltage close to 0V should be displayed. At maximum pressure input, a voltage close to 10V should be displayed.
Through the above methods, the status of a transmitter can basically be detected. If accurate detection is required, a standard pressure source is required. Apply pressure to the sensor and calibrate the transmitter according to the pressure and the change in the output signal. And when conditions permit, conduct temperature detection of relevant parameters.
2. Zero point detection.
Use the voltage range of the multimeter to detect the zero output of the transmitter without applying pressure. This output is generally a mV level voltage. If it exceeds the technical specifications of the sensor, it means that the zero point deviation of the transmitter is out of range.
3.Detection of bridge roads.
It mainly detects whether the circuit of the transmitter is correct, usually a Wheatstone full-bridge circuit. Use the ohm range of the multimeter to measure the impedance between the input terminals and the impedance between the output terminals. These two impedances are the input and output impedances of the pressure sensor. If the impedance is infinite, the bridge is open. It means there is a problem with the transmitter or the pin definition is not correct.
Troubleshooting for 4-20ma Pressure Transmitter
1. The pressure transmitter has no output and no display
Check whether the power supply is reversed. Connect the polarity of the power supply correctly
Measure the power supply of the transmitter, whether there is 24V DC voltage. It is necessary to ensure that the power supply voltage supplied to the transmitter is ≥12V (intelligent type) ≥15V (ordinary type). If there is no voltage, check whether the circuit is open or not, and check the secondary instrument/PLC sampling resistance (input impedance should be ≤250Ω)
If it has a head, check the head for damage. You can short-circuit the two wires of the meter head first. If it is normal after short-circuiting, it means that the meter head is damaged. Replace the header.
Connect the ammeter in series to the 24V power circuit to check whether the current is normal. If it is normal, it means that the transmitter is normal. At this time, you should check whether other instruments in the loop are normal.
Whether the wiring is loose. Connect the wires and tighten.
Whether the power supply is correctly connected to the power input terminal of the transmitter. Correctly connect to the power terminal according to the power requirements.
Whether the power supply of the transmitter is normal. If it is less than 12VDC, you should check whether there is a large load in the circuit. The input impedance of the transmitter load should comply with RL≤(transmitter power supply voltage-12V)/(0.02A) Ω.
Whether the actual pressure exceeds the upper limit of the full scale. Reselect a pressure transmitter with an appropriate range.
Whether the sensor is damaged. Severe overloading can sometimes damage the isolating diaphragm. It needs to be returned to the factory for inspection.
Whether the power cord is connected correctly. The power cord should be connected to the corresponding terminal.
3. Transmitter output≤4mA
Whether the power supply of the transmitter is normal. If it is less than 12VDC, you should check whether there is a large load in the circuit. The load capacity of the transmitter should comply with RL≤(transmitter power supply voltage-12V)/(0.02A)Ω.
Whether the wiring is loose causes the contact resistance to increase, which is equivalent to the increase of the load. Connect the wires and tighten them, and the load should meet RL≤(transmitter power supply voltage-12V)/(0.02A) Ω.
Whether the actual pressure exceeds the selected range of the pressure transmitter. Reselect a pressure transmitter with an appropriate range.
Whether the sensor is damaged, severe overload sometimes damages the isolation diaphragm. It needs to be returned to the factory for inspection.
4. The pressure display/output signal is incorrect and has errors
Whether the power supply of the transmitter is normal. If it is less than 12VDC, you should check whether there is a large load in the circuit, and the load capacity of the transmitter should meet RL≤(transmitter power supply voltage-12V)/(0.02A) Ω.
Whether the reference pressure value must be correct. Replace with the same model product. If the error is consistent, check the reference pressure gauge. If the accuracy of the instrument is low, another instrument with higher accuracy needs to be replaced.
The load capacity of the transmitter should comply with RL≤(transmitter power supply voltage-12V)/(0.02A)Ω. If it does not meet the requirements, corresponding measures can be taken according to the difference: such as increasing the supply voltage (but must be lower than 36VDC), reducing the load, etc.
Whether the corresponding equipment casing is reliably grounded. The equipment shell is reliably grounded.
Whether the on-site strong current and weak current are wired separately. Scientific and reasonable wiring to avoid signal instability/error caused by interference.
The sensor diaphragm is easily deformed, and overload, foreign objects, and hard objects sometimes damage the isolation diaphragm. It needs to be returned to the factory for inspection.
Impurities in the pipeline will affect the measurement accuracy. Impurities need to be cleaned, and a filter is added before the pressure port.
5. The pressure control system cannot be connected
The input of the pressure indicating instrument is 4~20mA, and the output signal of the transmitter can be directly connected. If the input of the pressure indicating instrument is 1~5V. Then a resistor with a precision of 1/1000 or above and a resistance of 250Ω must be connected to the input terminal of the pressure indicating instrument. Then connect to the input of the transmitter.
No matter which pressure transmitter you choose. The signal output by the pressure transmitter, such as 4-20mA. The pressure signal can be interfaced to a paperless recorder. Multi-channel pressure signal monitoring.
6. recorder no record
When the multipoint paper recorder does not record. If the input is open, then:
No other loads can be carried;
Use another recorder with input impedance ≤250Ω when there is no record.
7. The temperature of the pipeline is too high
The temperature of the pipeline is too high, add a buffer tube to dissipate heat. It is best to add some cold water to the buffer tube before use. In order to prevent the superheated steam from directly impacting the sensor. Thereby damaging the sensor or reducing the service life.
8. Pressure Transmitter 4-20mA installation problem
In steam flow measurement, steam mainly involves two kinds, one is external steam, and the other is superheated steam of boiler.
The externally supplied steam is the steam after decompression and decompression. The temperature is not high, and it is mixed with a lot of water. It needs to be used and not used. The steam flow rate can be changed according to the user’s requirements.
In the actual flow measurement process, sometimes the flow rate is too large and sometimes the flow rate is too small. It is very unstable. Blowdown is often required. The measurement of the transmitter is accurate after each blowdown. All joints on the pressure guiding pipe leak steam.
In the use of measuring superheated steam, the biggest problem found is that sometimes the machine shuts down, and the flow rate will deviate after restarting, resulting in inaccuracy. Sometimes there is still a little flow display after stopping.
Generally, the installation position of the transmitter is lower than the measuring pipe. But in the actual installation, the condensing tank and the transmitter for external steam flow are both higher than the measuring pipe, and the pressure guiding pipe that is laid down at least 1 meter from the throttling device is too short.
The superheated steam flow of the boiler also has the problem of inconsistent heights between the condensing tank and the measuring pipe. This leads to an imbalance in the height of the condensed water, which causes a static pressure difference.
9. Pressure guide pipe blockage problem
In pressure measurement, sometimes the indicated pressure does not vary with operating conditions. After opening the drain valve, there is only a small amount of sewage and no water flows out. This is because there will be a small amount of floating dust in the water quality or compressed air, which will enter the pressure guiding pipe for sedimentation along with the water flow. After a long period of operation, the wall of the pressure guiding pipe will be corroded and fouled, and blockage will occur.
10. Pressure Transmitter 4-20mA equipment itself fault problem
In the measurement of lubricating oil pressure, since the lubricating oil pressure signal participates in the shutdown interlock control. The signal measured by the lubricating oil pressure transmitter is transmitted to the computer. On the one hand, it is displayed. On the other hand, the signal is compared by the program. When the pressure is lower than 0.06MPa, it will send a signal to stop due to lack of oil.
From the trend graph of the lubricating oil pressure signal, it can be seen that the pressure is an instantaneous drop in a straight line, resulting in a trip. After checking the transmitter, it was found that the internal module of the transmitter was damaged. Although the transmitter is regularly calibrated every year, it is used for production after passing the test.
After several years of operation of the transmitter, its accuracy, sensitivity, stability and other performance indicators will gradually decrease. The internal diaphragm and integrated block will also be damaged and malfunction.
11. There is an interference problem
In the measurement of the exhaust pressure of the air compressor, the fluctuation of the exhaust pressure signal is large. After the transmitter is verified, it meets the accuracy requirements, and the fault of the transmitter itself is eliminated.
Check that the pressure guide tube and connector are not damaged or leaked. The connection of the signal cable is in good contact. However, the direction of the cables is introduced into the control room through the cable bridge next to the high-end distribution room. There is a lot of electromagnetic interference around.
Learn More About Pressure Transmitter 4-20mA
A pressure transducer often called a pressure transmitter, is a transducer that converts pressure into an analog electrical signal.
Although there are various types of pressure transducers, one of the most common is the strain-gage base transducer.
The conversion of pressure into an electrical signal, is achieved by the physical deformation of strain gauges, which are bonded into the diaphragm of the pressure transducer, and wired into a Wheatstone bridge configuration.
Pressure applied to the pressure transducer produces a deflection of the diaphragm, which introduces strain to the gages.
The strain will produce an electrical resistance change proportional to the pressure.
A pressure transmitter is a device that converts pressure into a pneumatic signal or an electric signal for control and remote transmission.
It can convert the physical pressure parameters such as gas and liquid felt by the load cell sensor into a standard electrical signal (such as 4~20mADC, etc.). It can be used to supply secondary instruments such as indicating alarms, recorders, and regulators for measurement and indication. and process regulation.
4-20mA means that the minimum current is 4mA and the maximum current is 20mA.
The industry generally needs to measure various non-electrical physical quantities, such as temperature, pressure, speed, angle, etc. They all need to be converted into analog electrical signals before they can be transmitted to the control room or displays red meters of equipment away. This device that converts physical quantities into electrical signals is called a transmitter. The most widely used in the industry is to use a 4-20mA current to transmit analog quantities.
Because 4-20mA signals are least affected by electrical noise and resistance in the signal line, these sensors are best used when signals must be transmitted over long distances. These sensors are typically used in applications where the lead must be 1000 feet or more.
A pressure sensor is a device or device that can sense a pressure signal and convert the pressure signal into a usable output electrical signal according to a certain rule.
A pressure sensor usually consists of a pressure-sensitive element and a signal processing unit. According to different test pressure types, pressure sensors can be divided into gauge pressure sensors, differential pressure sensors and absolute pressure sensors. A pressure sensor is the core part of pressure transmitter.
In a pressure transducer, a thin-film or piezo-resistive pressure sensor is mounted on a process connection. The transducer converts pressure into an analog electronic output signal, typically as a millivolt per volt output. These signals are not linearized or temperature compensated.
A pressure transmitter has additional circuitry that linearizes, compensates, and amplifies the signal from a transducer. The different signal types are typically voltage signals (eg, 0 to 5 or 0 to 10 volts), milliamp (eg, 4 to 20 milliamp), or digital. The instrument then can transmit the signal to a remote receiver.
Two-wire transmission has specific requirements for its minimum supply voltage, output current, and transmitter power consumption.
Only when these three conditions are satisfied in the design can the two-wire transmission be realized. The four-wire system requirements are not as high as the two-wire system.
Therefore, the two-wire system and the four-wire system have different requirements for the electronic components of the whole circuit.
For the two-wire instrument, the output signal is mostly 4-20mA (there are also frequency signal output).
But the four-wire instrument has more output signals, such as current signal 4-20mA, 0-10mA, voltage (millivolt) signal, frequency signal, etc.
What is a gas pressure sensor? Gas Pressure Sensors are also called Gas Pressure Transducers. Gas Pressure Sensors convert gas pressure into standard electrical signals, such as 4~20mADC. Measurement, indication…
Water Pressure Sensors Water Pressure Sensors refers specifically to instruments used to measure the pressure of tanks, pipes or underground water. Also called Water Pressure Transducers, or Water Pressure transmitters…
Pressure Sensor Applications refer to industrial pressure transmitters that convert gas, liquid and other pressure parameters into standard electrical signals (such as 4~20mADC, etc.). For on-site or remote measurement and…
After the Pressure Transducer is installed, how should I wire it? Pressure sensor wiring refers to the electrical connection of the pressure sensor. A pressure transmitter is a conversion device…
High Accuracy Pressure Transducers are also called high precision pressure transducers or high accuracy pressure sensors. Sino-Inst manufactures various types of High Accuracy Pressure Transducers. From the perspective of accuracy,…
Flow Pressure Transducers are measurements of fluid pressure within a pipeline. When fluid flows through a pipe, pressure acts on the pipe wall. The medium in the pipeline can be…
Flat Pressure Sensor is a type of pressure sensor that specifically refers to the measurement diaphragm without pressure holes. Also known as a flat film pressure sensor. Flat Pressure Sensor…
What Is Resistive Pressure Transducer? Resistive pressure transducers are also called resistance pressure transducers. It is a commonly used pressure sensor. Pressure sensors are generally distinguished by principle: capacitive pressure…
What Is a Fluid Pressure Sensor? Fluid Pressure Sensors refers to sensors that can be used to measure the pressure of liquid media. Such as measuring pressure of Oil, Fuel…
What Is a Smart Pressure Transmitter? Smart pressure transmitter is also called Smart pressure sensor or Smart pressure transducer. Smart pressure transmitter is the best pressure measuring instrument. It is…
What is underwater pressure transducer? Underwater pressure transducer refers to a type of pressure sensor that can be used underwater for a long time. The degree of protection of the…
High Temperature Pressure Transducer is also called High Temperature Pressure Sensor, or High Temperature Pressure Transmitter. The High Temperature Pressure Transducer is used for applications where the medium temperature exceeds…
What Is Static Water Pressure? Definition of Static Water Pressure: Static Water Pressure refers to the pressure on water when it is stationary or moving in a straight line at…
Sino-Inst is a manufacturer of Pressure Transmitter 4-20mA. We offer more than 50 types of Transmitters. Main products include compact pressure transmitters, industrial pressure transmitters, differential pressure transmitters, single crystal silicon pressure transmitters, diffused silicon pressure transmitters , Diaphragm pressure transmitter, high temperature pressure transmitter, explosion-proof pressure transmitter, pressure transmitter, custom pressure transmitter, with remote pressure transmitter, 316 diaphragm pressure transmitter.
The Pressure Transmitter 4-20mA is mainly used to measure the pressure and liquid level of the medium. In industrial production, it is widely used. Sino-Inst pressure transmitter adopts high-quality diffused silicon type, and the pressure transmitter adopts a dedicated integrated module. Fine temperature, zero point, full scale and nonlinear compensation. Realize accurate measurement and transmission of pressure changes in liquid, gas, steam and other media. Realize the ideal monitoring of changes in pressure and vacuum media in various places for enterprises, scientific research institutes and other departments.
Sino-Inst’s entire team is well trained, so we can ensure that each customer’s needs are met. If you need any help with your product requirements, whether it is a Pressure Transmitter 4-20mA, level sensors, or other equipment, please give us a call.
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Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Gas Pressure Sensors are also called Gas Pressure Transducers. Gas Pressure Sensors convert gas pressure into standard electrical signals, such as 4~20mADC. Measurement, indication and process adjustment are carried out by supplying secondary instruments such as indicating and alarming instruments, recorders, and regulators.
Gas pressure measurement is widely used in the field of industrial process control for process control and monitoring. Different gases have different properties, so different pressure sensors and transmitters are required to measure different gas pressures. For example, measuring oxygen, hydrogen, chlorine, compressed air, high temperature gas, etc.
Gas pressure sensors are designed (or configurable) to measure gas pressure in different ways. In industrial settings, they can be used to measure the velocity of gas flow (sometimes called “shock pressure”), confirm the presence of suction, manage source pressure, or test for leaks.
(1). Gauge pressure is measured relative to ambient atmospheric pressure. Atmospheric pressure at sea level is about 100kPa (14.7 PSI). Sensors built into tire air pumps measure pressure this way, showing the air pressure inside the tire relative to the local atmospheric pressure. A reading of zero indicates equal internal and external pressure.
(2). Sealed air pressure sensors are similar to gauge air pressure sensors. But are pre-calibrated to measure air pressure relative to sea level atmospheric pressure. Therefore, if the device is taken to a different altitude or location, its readings will not change. More about: Diaphragm pressure gauge working principle.
(3). Vacuum pressure is a measure of the negative difference between the gas pressure at a given location and the atmospheric pressure.
In addition to gas pressure detection, we also provide Industrial Gas Measurement with Digital Gas Mass Flow Meters.
(4). Absolute air pressure is measured from zero or perfect vacuum (0 PSI). Again, unlike gauge pressure, this is not affected by the conditions surrounding the device. These conditions will vary with altitude and other factors.
(5). Differential pressure is the difference between two gas pressures. For example, the pressure difference in two gas hoses connected to the sensor. As with gauge pressure, a sensor may be able to measure changes in air pressure in either direction (i.e. positive or negative).
In addition to different types of measurements, some barometric pressure sensors are also designed to measure rapid pressure changes in dynamic environments. For example combustion pressure in engine cylinders or gas turbines.
Oxygen plays an important role in the smelting process, chemical industry, national defense industry, and medical care. However, the production and use of oxygen is extremely prone to combustion and explosion.
According to the mechanism of combustion and explosion “three elements” (combustibles, oxidants, excitation energy). The stronger, the more dangerous. Potential excitation energy sources for combustion or explosion are generally in the following ways: friction, compression heat, impact force, electric arc, resonance, etc.
During the construction of industrial oxygen pipelines, multi-channel cleaning processes such as rust removal, scrubbing, sandblasting, blowing, degreasing, pickling, etc. should be carried out to remove oil and impurities in the pipelines so that they can meet the conditions for transporting oxygen media. And in accordance with relevant standards Check and accept. It can be used only after passing the test.
For oxygen pressure measurement, choosing a clean instrument filled with inert oil not only improves the safety level, but also greatly reduces the risk of economic and time loss caused by maintenance or failure replacement.
The pressure sensor for oxygen measurement supplied by Sino-Inst is required for the application of oxygen pressure measurement. The sensor product is filled with Fluorolube® oil. At the same time, oil-free technology is used for production. Finally, the sensor and transmitter are cleaned and packaged according to the oxygen level cleaning process.
The above sensors can be used in hazardous locations, including explosion-proof, intrinsically safe products. And it can be used in the occasions involving oxygen pressure measurement such as factories and hospitals.
The special pressure sensor for oxygen measurement must be cleaned strictly by oxygen grade cleaning process. Ensure that the sensor is clean and free of oil, corrosion, scaling, particles and other impurities. During the oxygen pressure measurement process, the potential risk of oxygen combustion or explosion caused by sensor oil pollution is completely solved.
Oxygen grade cleaning operations must be carried out in a dust-free and clean environment. To be operated by trained and qualified professionals. Use a special cleaning agent to clean the sensor and its accessories. Cleaning needs to go through multiple processes such as soaking, wiping, scrubbing, rinsing, drying, and sealing packaging. At the same time, during the cleaning process, special inspection equipment and precision instruments are used to conduct qualitative and quantitative inspections of the oil on the surface of the sensor. Make sure the sensor is clean.
Sino-Inst has an oxygen level cleaning platform, perfect cleaning process and quality control process. It cleans and seals the pressure sensor and pressure transmitter for measuring oxygen and high cleanliness.
Hydrogen (H2) is an extremely flammable, colorless, and odorless gas at normal temperature and pressure. Hydrogen has strong reducing properties and is a common industrial gas. It has a large number of applications in chemical, electronic, automotive, aerospace and other industries.
Hydrogen is easy to diffuse rapidly. When the ratio of hydrogen mixed with air exceeds 4%, it will become a combustible gas. Therefore, strict process and process control are required in the process of production, storage and transportation.
Since the hydrogen atom is very small, it will diffuse through the lattice of the diaphragm (usually stainless steel), thereby penetrating into the cavity filled with silicone oil. After long-term use, the infiltrated gas can damage the sensor.
Although gold is less permeable than stainless steel, gold-plated diaphragms are an effective way to prevent hydrogen permeation.
Featured Hydrogen Pressure Sensors and Transducers
The pressure sensor dedicated to hydrogen measurement has many advantages in the pressure monitoring application of hydrogen production and purification equipment, hydrogen storage and transportation equipment.
In the process of measuring hydrogen pressure with a piezoresistive isolated pressure sensor. Since the atoms of hydrogen are very small, they will diffuse through the lattice of the diaphragm (usually stainless steel), thereby penetrating into the cavity of the sensor filled with silicone oil. Over time, the permeated gas can seriously affect the performance of the sensor. Effectively prevent the occurrence of “hydrogen embrittlement” and “hydrogen permeation”.
Measuring range: -100kPa…0kPa~35kPa…20MPa
Isolated structure, suitable for the measurement of hydrogen medium;
Pure flat membrane structure, using no dead angle full welding technology, the minimum thickness of gold plating layer is greater than 2μm;
The purity of gold plating on the surface reaches 99.8%;
The problem of hydrogen storage and transportation is an important factor affecting the cost of hydrogen. Pipeline hydrogen transportation has low cost and low energy consumption. It can realize continuous, large-scale and long-distance transportation of hydrogen energy. It is an important breakthrough direction for hydrogen storage and transportation problems.
It can be applied to hydrogen transportation scenarios such as hydrogen transportation vehicles. At the same time, it is also very suitable for pressure measurement of hydrogen storage cylinders and tank trucks and other gas and liquid hydrogen in hydrogen transportation.
Chlorine is a simple substance formed by chlorine, with the chemical formula Cl2. It is yellow-green under normal temperature and pressure. It is a highly toxic gas with a strong pungent smell. It is suffocating and has a higher density than air.
Melting point -101.00°C, boiling point -34°C. Soluble in water and alkali solution, easily soluble in organic solvents (such as carbon tetrachloride), hardly soluble in saturated saline. It is easy to compress and can be liquefied into yellow-green oily liquid chlorine.
Generally, steel, iron, copper, nickel, etc. are resistant to dry chlorine, but once chlorine gas is mixed with a small amount of water, it will generate hypochlorous acid and hydrochloric acid, which are highly corrosive to most metals.
Therefore, pressure sensors and transmitters used for chlorine pressure measurement must use special corrosion-resistant housing and diaphragm materials to ensure reliable and accurate measurement.
Featured Chlorine Pressure Sensors and Transducers
There are 2 types of chlorine pressure transmitters that are common:
Dry chlorine. Pure chlorine gas is non-corrosive. It can be said that it is economical and affordable to use ordinary pressure gauges to measure pressure.
Moist chlorine. If chlorine contains water, chlorine and water will react chemically to synthesize HCL and chloride ions. We all know that chloride ions are highly corrosive, and a special pressure transmitter must be used to measure pressure in order to resist the corrosion of chloride ions.
High Temperature Pressure Sensor with high temperature resistant pressure core or sapphire core as pressure measurement material. After high reliability amplifier circuit and precise temperature compensation. The absolute or gauge pressure of the measured medium is converted into standard electrical signals such as 4 ~ 20mA, 0 ~ 5VDC, 0 ~ 10VDC. It is also widely used in industry. Collect pressure signals at the points of some high-temperature steam and fluid pipes.
Range: -100KPa ~ 0 ~ 100MPa optional
Accuracy: ± 0.5% FS (composite error including non-linear repeatability hysteresis)
Pressure connection: M20 * 1.5 M22 * 1.5 M16 * 1.5 M11 * 1 NPT1 / 4 NTP1 / 2 NTP3 / 8 G1 / 8 G1 / 2 G1 / 4 G3 / 8,1 / 2-20UNF, etc. Other threads can be according to customer requirements design
Frequently asked questions
There are many types of pressure sensors. The following are some commonly used pressure sensors.
Ceramic piezoresistive pressure sensor: with high precision and high stability of measurement. The electrical insulation degree is greater than 2KV, the output signal is strong, and the long-term stability is good. There is no choice between micro range and large range, it is only applicable to gauge pressure measurement.
Single crystal silicon pressure sensor: wide measuring range, high precision. Wide operating temperature, good stability, excellent static pressure characteristics. It has good one-way compression characteristics.
Capacitive pressure sensor: low input force and component Ru energy. High dynamic response, small natural effects. Good environmental adaptability.
Sapphire pressure sensor: The main advantage is that it can measure high-temperature media and is not sensitive to temperature changes. The drift in time at high temperature is the lowest among these types of sensors. Sapphire can be the most The large range is up to 160MPa, while the maximum range of diffused silicon is 35MPa.
Quartz crystal pressure sensor: high frequency response pressure sensor, quick response. The digital output is stable and reliable, with strong anti-interference. Suitable for long-distance transmission, eliminating the analog The complexities of digital conversion and the errors it creates.
Sputtering thin film differential pressure sensor: the outstanding feature is that it is less affected by temperature. When the temperature changes by 100°C, the zero point drift is only 0.5%. Its temperature performance is much better than that of diffused silicon, and it can Features such as use under harsh environmental conditions.
Strain-type differential pressure sensor: The most widely used is the strain-type pressure sensor. It has extremely low price and high precision and good linear characteristics.
There are two types of resistance strain gauges: metal and semiconductor. Metal strain gauges are divided into wire type, box type, and film type. Semiconductor strain gauges have the advantages of high sensitivity and small lateral effects.
The above pressure sensors are commonly used by us. Each has its own characteristics, and the type is determined according to the needs when choosing.
For example, Below is a pressure sensor for measuring high temperature gas. The parameters are roughly:
Pressure range: 0-30psig,
300 degrees Celsius high temperature
without local display;
4-20mA signal output;
Mounting thread 7/16″-20UN-2A (Male SAE-4);
The above parameters are customized according to user requirements. Even the body length of the sensor is customized to the 160mm length requested by our customer.
A pressure sensor is a device or device that can sense pressure and convert the pressure signal into an electrical signal output according to certain rules.
Pressure sensors usually refer to component-level products with non-standard mV signal output. They are the core components of pressure transmitters.
Pressure transmitters measure the liquid level, density and pressure of liquids, gases or vapors, acting on sensitive diaphragms. In general, a pressure transmitter is mainly composed of three parts: a load cell sensor (also called a pressure sensor), a measurement circuit, and a process connection.
It can convert physical pressure parameters such as gas and liquid felt by the load cell sensor into a standard electrical signal (such as 4~20mADC, etc.). It can be used to supply secondary instruments such as indicating alarms, recorders, and regulators for measurement and indication. and process regulation.
Try to avoid direct contact between the transmitter and the corrosive or overheated measured medium.
To prevent dross from depositing in the pressure guiding tube.
The pressure guiding tube should be as short as possible.
The liquid column pressure in the pressure guiding tubes on both sides should be kept balanced.
The pressure guiding pipe should be installed in a place with small temperature gradient and temperature fluctuation.
When measuring liquid flow, the pressure tap should be opened on the side of the process pipeline to avoid sedimentation of dross. At the same time, the transmitter should be installed next to or below the pressure port so that the air bubbles can be discharged into the process pipeline.
When measuring gas flow, the pressure tap should be opened on the top or side of the process pipeline. And the transmitter should be installed next to or above the process pipeline so that the accumulated liquid can easily flow into the process pipeline.
When using a transmitter with a side relief valve in the pressure chamber, the pressure tap should be opened on the side of the process pipe. For example, when the measured medium is liquid, the relief valve of the pressure transmitter should be installed on it so as to exclude the gas infiltrated in the measured medium. When the measured medium is gas, the discharge valve of the transmitter should be installed below to discharge the accumulated liquid. The pressure chamber can be turned 180° so that the relief valve above it can be changed to the bottom.
The transmitter can be installed directly at the measuring point. It can be installed on the wall, or clamped on the pipeline with the installation plate (transmitter accessory).
Hydrogen embrittlement usually manifests as delayed fracture under stress. The phenomenon of delayed fracture occurs because the hydrogen in the part diffuses to the stress concentration part and gathers the metal defects in the stress concentration part (atomic lattice dislocation, holes, etc.).
Hydrogen diffuses into these defects, and hydrogen atoms change into hydrogen molecules to generate enormous pressure. This pressure and the residual stress inside the material and the external stress of the material form a resultant force. When this resultant force exceeds the yield strength of the material, fracture occurs.
Since hydrogen embrittlement is related to the diffusion of hydrogen atoms. Diffusion takes time, and the speed of diffusion is related to concentration gradient, temperature and material type.
A pressure transmitter is a device that converts pressure signals into electrical signals for control and remote transmission. Its core components are single crystal silicon resonant sensors and measuring capsules.
In order to reduce the pressure loss in the transmission process and prevent corrosion by the measurement medium. Generally, the metal thin-walled material with certain elasticity and anti-corrosion performance (the thickness is between 40 ~ 80um, which is slightly different for each equipment supplier) is selected to make the measuring diaphragm. Common measuring diaphragm materials include 316L stainless steel, Hastelloy, tantalum, titanium and many other types.
Since the thickness of the measuring diaphragm is less than 0.1mm, conventional pressure transmitters are prone to hydrogen embrittlement and are affected under harsh working conditions (high temperature and high pressure and high concentration of hydrogen). As a result, the toughness of the measuring diaphragm degrades and loses its elasticity, and cavity bulges or cracks appear.
Over time the hydrogen molecules can even penetrate the measuring diaphragm into the insulating silicone fluid. The presence of air bubbles increases losses during pressure transmission. It will also directly interfere with the measurement effect of the pressure transmitter, resulting in zero drift of the pressure transmitter and unstable output. Measurement errors and fluctuations in pressure measurement parameters occur. In more serious cases, the pressure transmitter may even be damaged, resulting in a safety accident.
Therefore, the selection of the measuring diaphragm of the pressure transmitter under the working condition of the coal gasification device is more important.
High pressure rotameter is suitable for flow measurement of high pressure liquid and gas.Standard type rotameter: DN15-DN50, can withstand 4.0MPa. High pressure rotameter: DN15-DN50, can withstand 25MPa. The pressure level…
Sino-Inst offers a variety of Digital gas flow meters for flow measurement. If you have any questions, please contact our sales engineers. Featured Digital gas flow meters for Sale Are…
Are high pressure flow meters the same as regular flow meters? Can high pressure flow meters be replaced by ordinary flow meters?Of course not. You need to measure the flow…
What is Gas Rotameter? Rotameter is also called float flowmeter. It is often called glass tube float flowmeter, glass rotameter, metal rotameter, and metal tube float flowmeter.Rotameter is mainly used…
An Air pressure transducer is a sensor that converts the mechanical signal of air pressure into a current signal. Pressure has a linear relationship with voltage or current, and it…
What Is Digital Air Flow Meters? The digital air flow meter is also a digital gas flow meter. The digital air flow meter can measure and display parameters such as…
Biogas Flow Meters are instruments that can measure the flow of biogas. Could be a vortex flow meter, thermal mass flow meter, etc. Commonly used in biogas stations, biogas production…
Featured Inline Air Flow Meters Inline air flow meter units conversion Inline air flow meter cfm CFM is a common imperial flow unit, cubic feet per minute.For a certain volume…
Compressed Air Flow Meter, is the digital flow meter work for the air compressor. Air consumption is an important info for industrial inline gas flow pipe. According to the measurement…
CO2 flow meters are instruments that can measure the flow of gaseous or liquid carbon dioxide. CO2 is a common industrial gas, and effective measurement is very important. Sino-Inst offers…
How to choose a Hydrogen flow meter? Hydrogen is a valuable and widely measured industrial gas. Custody transfer metering is a very important feature of hydrogen flow measurement. Sino-Inst offers…
Sino-Inst is a manufacturer of Industrial Gas Pressure Sensors and Transducers. We offer more than 50 types of Gas Pressure Sensors.
Industrial Gas Pressure Sensors and Transducers are used in hydraulic and pneumatic control systems, thermoelectric units, constant pressure water supply systems, power station operation inspections, petrochemical, environmental protection, air compression, locomotive braking systems, light industry, mechanical metallurgy, building automation, and other automation And testing systems, industrial process testing and control, laboratory pressure calibration, etc.
Sino-Inst’s entire team is well trained, so we can ensure that each customer’s needs are met. If you need any help with your product requirements, whether it is Industrial Gas Pressure Sensors and Transducers, level sensors, or other equipment, please give us a call.
Request a Quote
Please enable JavaScript in your browser to submit the form
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Water Pressure Sensors refers specifically to instruments used to measure the pressure of tanks, pipes or underground water. Also called Water Pressure Transducers, or Water Pressure transmitters. Commonly used Water Pressure Sensors generally purchase diffused silicon. Convert the measured water pressure into an electronic signal. Local digital display, or analog signal or digital signal output. It is convenient for people to monitor water pressure.
Sino-Inst, as a manufacturer of Water Pressure Sensors. We provide water pipe pressure sensors, water tank pressure sensors, drinking water pressure sensors, groundwater pressure sensors, deep well pressure sensors, etc. Guarantee accurate, stable and reliable pressure measurement. 0~300psi, 1000psi, 2000psi and other customizable pressure ranges. Parameters such as materials, output signals, and pressure ports can be customized as required.
The so-called water pressure refers to the pressure of water.
It is generally believed that 0.1Mpa=10 meters of water, and the supply pressure at the end of the pipe network is 0.14Mpa. More intuitively, 0.1MPa is equivalent to a standard atmospheric pressure. The supply pressure at the end of the pipe network is 0.14Mpa, which is equivalent to a height of 14 meters from the tap to the water supply tower (pool).
Sino-Inst’s water pressure sensors are used in various industries and fields. Such as hydropower stations, hydrology, environmental monitoring, etc.
For example, they measure water depth, monitor seawater pressure in dams, calculate flow rates and control water levels.
Due to the rich experience in water pressure sensors installed in pipes, water tanks, etc., Sino-Inst can provide you with extensive professional advice in various fields.
Water pressure sensors are used to measure the static pressure of water in pipelines, storage tanks, and many other applications.
Underwater pressure sensors can also be used to measure groundwater depth in boreholes and wells, as well as agricultural irrigation, etc.
The domestic water industry will collect and send parameters such as pressure, flow, and temperature of the pipeline to the platform. The platform will process the data. Real-time control of the operation of each point. Quick repair of equipment failure, greatly reducing equipment operating costs,
Pressure sensors are also being gradually installed on fire hydrants. Prevent losses caused by fire hydrant leakage.
Water pressure transmitter is the most commonly used pressure transmitter in the field of industrial automation. Widely used in water supply equipment, building water supply system. Residential, factory buildings, water conservancy and other pressure measurement and control. Water pressure transmitters will play an inestimable role in the future automation industry.
Industrial water supply, water treatment and other industries need to pump and pressurize continuously to send water to high places or increase water pressure. Installing a water pressure sensor can effectively monitor changes in water pressure. Even realize the control of the switch.
The water pressure sensor has gradually replaced the old pressure gauge. When you choose a pressure sensor, please pay attention to learn more about the actual working conditions. Choose a more suitable pressure sensor. To ensure long-term stable operation.
The application of pressure transmitters to measure liquid levels has its own unique features. For the liquid level deviation caused by temperature changes, we can indirectly convert the density through the temperature compensation operation according to the corresponding relationship between density and temperature, and then calculate the height of the liquid column. And these are not difficult to realize in the control software. In particular, some smart transmitters have their own temperature compensation function.
After the sensor and converter of the pressure transmitter are separated and arranged in the installation form, it can also be applied to the water level measurement of deep wells, groundwater and borehole water levels, sewage pools and other containers, and has a good application prospect.
Sino-Inst offers a range of liquid level sensors for water pressure measurement applications.
More Water Pressure-Water Level-Water Flow Monitoring Solutions
Water is important in every industry. Including agriculture, industry, fire protection, etc. How to effectively, stably, and low-cost monitor water resources is very important.
Sino-Inst provides a variety of solutions, including water pressure, water level, water flow monitoring in seawater solutions such as sewage treatment, seawater desalination, etc.
Water pressure sensors, also known as water pressure transmitters and transmitters, are widely used in water pressure measurement in many fields such as water tank pressure sensors, water pipeline pressure sensors, and water container water pressure sensors.
The core of the water pressure sensor is usually made of diffused silicon. The working principle is that the pressure of the measured water pressure acts directly on the diaphragm of the sensor. Make the diaphragm produce a micro-displacement proportional to the water pressure. Change the resistance value of the sensor. and electronically detect this change. And convert and output a standard measurement signal corresponding to the pressure.
A pressure sensor is a device or device that can sense a pressure signal and convert the pressure signal into a usable output electrical signal according to a certain rule. A pressure sensor usually consists of a pressure-sensitive element and a signal processing unit. According to different test pressure types, pressure sensors can be divided into gauge pressure sensors, differential pressure sensors and absolute pressure sensors. A pressure sensor is the core part of pressure transmitter. More.
Water Pressure Sensors calibration is what you need to do before you install the pressure transmitters. Also called pressure transducer calibration, or pressure sensor calibration.
Pressure transmitters used in the process industries are very durable and reliable instruments.
Even so, they still require periodic maintenance and calibration to ensure optimal performance.
A pressure sensor is a device or device that can sense pressure and convert the pressure signal into an electrical signal output according to certain rules.
Pressure sensors usually refer to component-level products with non-standard mV signal output. They are the core components of pressure transmitters.
Pressure transmitters measure the liquid level, density and pressure of liquids, gases or vapors, acting on sensitive diaphragms. In general, a pressure transmitter is mainly composed of three parts: a load cell sensor (also called a pressure sensor), a measurement circuit, and a process connection.
It can convert physical pressure parameters such as gas and liquid felt by the load cell sensor into a standard electrical signal (such as 4~20mADC, etc.). It can be used to supply secondary instruments such as indicating alarms, recorders, and regulators for measurement and indication. and process regulation.
Water level transducers are also called Water Level Sensors, or water level transmitters. Water level transducers are used to monitor water usage and quality. The water level signal is output through 4-20mA and other signals, which is convenient for people to monitor the water level.
There are many types of water level transducers. Common ones are input type, ultrasonic, radar and so on.
Sino-Inst offer a wide range of solutions with various pressure ranges, cable lengths and output options.
For remote monitoring and recording of water level data in groundwater pumping and sludge testing, stormwater flood analysis and runoff, and surface water irrigation canals, streams and river measurements.
Water level transducer is an instrument that can convert the water level parameter of the measured point into the corresponding electric quantity signal in real time.
The working principle of the Water level transducer is that when it is put into a certain depth in the liquid to be measured. The pressure on the sensor’s front surface is converted into the liquid level height.
The calculation formula is Ρ=ρ.g.H+Po.
In the formula P is the pressure on the liquid surface of the sensor; ρ is the density of the liquid to be measured; g is the local acceleration of gravity; Po is the atmospheric pressure on the liquid surface; And H is the depth at which the sensor drops into the liquid.
By installing a water pressure sensor, we can monitor the water pressure of the pipeline or tank.
The water pressure sensor can be configured with a local display to directly display the water pressure.
Water pressure sensor can be configured with analog signal output. Such as 4-20mA. 0-10V, 0-5V, etc. Users can connect the signal to their own monitoring system. Easy to manage water pressure data.
The water pressure sensor can be configured with RS485 communication protocol. Can be connected to a computer. Transfer water pressure data to computer software.
If you cannot find an answer to your question in our Water Pressure Sensors for Measurement of Water Pressure, you can always contact us and we will be with you shortly.
Pressure Sensor Applications refer to industrial pressure transmitters that convert gas, liquid and other pressure parameters into standard electrical signals (such as 4~20mADC, etc.). For on-site or remote measurement and…
Flow Pressure Transducers are measurements of fluid pressure within a pipeline. When fluid flows through a pipe, pressure acts on the pipe wall. The medium in the pipeline can be…
After the Pressure Transducer is installed, how should I wire it? Pressure sensor wiring refers to the electrical connection of the pressure sensor. A pressure transmitter is a conversion device…
High Accuracy Pressure Transducers are also called high precision pressure transducers or high accuracy pressure sensors. Sino-Inst manufactures various types of High Accuracy Pressure Transducers. From the perspective of accuracy,…
Flat Pressure Sensor is a type of pressure sensor that specifically refers to the measurement diaphragm without pressure holes. Also known as a flat film pressure sensor. Flat Pressure Sensor…
What Is Resistive Pressure Transducer? Resistive pressure transducers are also called resistance pressure transducers. It is a commonly used pressure sensor. Pressure sensors are generally distinguished by principle: capacitive pressure…
What Is a Fluid Pressure Sensor? Fluid Pressure Sensors refers to sensors that can be used to measure the pressure of liquid media. Such as measuring pressure of Oil, Fuel…
What Is a Smart Pressure Transmitter? Smart pressure transmitter is also called Smart pressure sensor or Smart pressure transducer. Smart pressure transmitter is the best pressure measuring instrument. It is…
What is underwater pressure transducer? Underwater pressure transducer refers to a type of pressure sensor that can be used underwater for a long time. The degree of protection of the…
What Is Static Water Pressure? Definition of Static Water Pressure: Static Water Pressure refers to the pressure on water when it is stationary or moving in a straight line at…
High Temperature Pressure Transducer is also called High Temperature Pressure Sensor, or High Temperature Pressure Transmitter. The High Temperature Pressure Transducer is used for applications where the medium temperature exceeds…
Sino-Inst is a manufacturer of Water Pressure Sensors for Measurement of Water Pressure. We offer more than 50 types of Water Pressure Sensors.
Water Pressure Sensors pressure sensor is mainly used to measure the pressure and liquid level of the medium. In industrial production, it is widely used.
Sino-Inst Water Pressure Sensors adopt high-quality diffused silicon type, and the pressure transmitter adopts a dedicated integrated module. Fine temperature, zero point, full scale and nonlinear compensation. Realize accurate measurement and transmission of pressure changes in liquid, gas, steam and other media. Realize the ideal monitoring of changes in pressure and vacuum media in various places for enterprises, scientific research institutes and other departments.
Sino-Inst’s Water Pressure Sensors are the most commonly used sensors in industrial applications. Widely used in water conservancy and hydropower, railway transportation, intelligent building, production control, aerospace, military industry, petrochemical industry, oil well, electric power, ship, machine tool, pipeline and other industries.
Sino-Inst’s entire team is well trained, so we can ensure that each customer’s needs are met. If you need any help with your product requirements, whether it is a Water Pressure Sensor, level sensors, or other equipment, please give us a call.
Request a Quote
Please enable JavaScript in your browser to submit the form
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Pressure Sensor Applications refer to industrial pressure transmitters that convert gas, liquid and other pressure parameters into standard electrical signals (such as 4~20mADC, etc.). For on-site or remote measurement and control.
Pressure sensors are arguably the most widely used sensors in industry. Because the pressure sensor is used in addition to measuring pressure. It can also measure flow, liquid level, density, etc.
Therefore, pressure sensors are widely used in various industrial automatic control environments. Including water conservancy and hydropower, rail transit, automatic production control, aerospace, petrochemical, oil wells, electric power, ships, machine tools, pipelines, etc.
A pressure sensor is a device that can sense pressure signals and convert the pressure signals into usable output electrical signals according to certain rules. Sino-Inst, as a manufacturer of pressure sensors. We stock over 50 featured pressure sensors.
If you are using a pressure sensor for the first time, you may wonder, what is a pressure sensor? Why are there pressure sensors with various appearances on the market?
In fact, the pressure sensor is a general term. There are many types and styles of pressure sensors. However, you don’t have to worry about how to choose. You just need to inform us of your measurements and installation parameters. We will produce suitable pressure sensors according to the parameters you require. Including measuring range, temperature, display, mounting thread, output signal, etc.
The above parameters are customized according to user requirements. Even the body length of the sensor is customized to the 160mm length requested by our customer.
Pressure sensors can be classified by the range of pressure they can measure, the operating temperature, and the type of pressure. According to the classification method of pressure type, pressure sensors can be divided into the following five categories:
Absolute pressure sensor:
This type of pressure sensor measures the true pressure of the fluid, that is, the pressure relative to vacuum pressure. The absolute atmospheric pressure at sea level is 101.325kPa (14.7PSI).
Gauge pressure sensor:
This pressure sensor can measure the pressure relative to atmospheric pressure at a specific location. A tire pressure gauge is an example. When the tire pressure gauge shows a reading of 0PSI, it means that the pressure inside the tire is equal to the atmospheric pressure, which is 14.7PSI.
This type of pressure sensor is used to measure pressures less than one atmosphere. Some vacuum pressure sensors in the industry read relative to atmospheric pressure (negative readings). And some are based on their absolute pressure.
Differential pressure sensor:
This instrument is used to measure the pressure difference between two pressures. For example, measuring the pressure difference across the oil filter. Differential pressure sensors are also used to measure flow or to measure liquid levels in pressure vessels.
Sealed pressure sensor:
This instrument is similar to a gauge pressure sensor, but this instrument is specially calibrated. The pressure it measures is relative to sea level.
According to the difference in structure and principle, it can be divided into: strain type, piezoresistive, capacitive, piezoelectric, vibration frequency pressure sensors, etc. In addition, there are photoelectric, optical fiber, ultrasonic pressure sensors, etc.
Pressure sensors will also have different classifications according to different measurement principles. The following is an introduction to the working principle of some common pressure sensors.
Piezoresistive pressure sensor Resistance strain gauge is one of the main components of piezoresistive strain sensor. The working principle of the metal resistance strain gauge is the phenomenon that the resistance value of the strain resistance adsorbed on the base material changes with mechanical deformation, commonly known as the resistance strain effect.
Ceramic pressure sensors Ceramic pressure sensors are based on the piezoresistive effect. The pressure acts directly on the front surface of the ceramic diaphragm, causing slight deformation of the diaphragm. Thick film resistors are printed on the back of the ceramic diaphragm. connected as a Wheatstone bridge. Due to the piezoresistive effect of the varistor, the bridge produces a highly linear voltage signal proportional to the pressure and proportional to the excitation voltage. The standard signal is calibrated as 2.0/3.0/3.3mV/V according to different pressure ranges. Compatible with strain gauge sensors.
Diffused silicon pressure sensor The working principle of the diffused silicon pressure sensor is also based on the piezoresistive effect. Using the principle of piezoresistive effect, the pressure of the measured medium acts directly on the diaphragm of the sensor (stainless steel or ceramics). Make the diaphragm produce a micro-displacement proportional to the medium pressure. The resistance value of the sensor is changed, and the change is detected by the electronic circuit. And convert and output a standard measurement signal corresponding to this pressure.
Sapphire pressure sensors: Utilizing the working principle of strain resistance, using silicon-sapphire as the semiconductor sensitive element, it has unparalleled measurement characteristics. Therefore, semiconductor sensitive elements made of silicon-sapphire are used. Insensitive to temperature changes. Even under high temperature conditions, it has very good working characteristics. Sapphire has strong radiation resistance. In addition, the silicon-sapphire semiconductor sensitive element has no p-n drift.
Piezoelectric pressure sensor:The piezoelectric effect is the main working principle of piezoelectric sensors. Piezoelectric sensors cannot be used for static measurements. Because of the charge after the external force acts on it. Only preserved when the loop has infinite input impedance. The actual situation is not like this, so this determines that the piezoelectric sensor can only measure dynamic pressure.
Pressure sensors can measure the pressure of liquid, steam, gas and other media. Convert pressure to electrical signal output. Pressure sensors can be installed on pipelines to measure pipeline pressure. A pressure sensor can be mounted on the tank wall to measure tank pressure. So, as long as the installation space allows. The measured medium is compatible with the diaphragm material. Then the pressure sensor can measure.
Differential pressure sensors can be used to measure the difference between two pressures, usually used to measure the pressure difference between the front and back of a device or component.
Differential pressure sensors need to pay attention to some matters in use: For example:
The measured medium is not allowed to freeze. Otherwise, the sensor element isolating diaphragm will be damaged. damage to the transmitter. Temperature protection of the transmitter is required when necessary. to prevent freezing;
When measuring steam or other high temperature media. Its temperature should not exceed the limit temperature when the transmitter is used. A heat sink must be used for temperatures higher than the limit temperature used by the transmitter;
When measuring steam or other high-temperature media, heat pipes should be used. Connect the transmitter and pipe together. And use the pressure on the pipeline to transfer to the transformer;
When the measured medium is water vapor. A proper amount of water should be injected into the cooling pipe. To prevent the superheated steam from directly contacting the transmitter and damaging the sensor;
Separate differential pressure sensors are not currently used much. There are many pressure sensors that can measure both absolute pressure and differential pressure. This is very convenient for customers to use.
Liquid Level Measurement
Pressure sensors can be used to measure liquid levels using the hydrostatic principle. From open waters such as reservoir levels or sea depths to tanks and containers. This assumes that the medium is a static liquid with constant specific gravity, and that the system compensates proportionally for liquids with different densities than clear water.
For example, when measuring the oil level in a tank, a lower specific gravity means a proportionally lower pressure per meter of still water depth or level. Additionally, if the tank is not vented, or is sealed under pressure, it will be necessary to measure and compensate for the surface pressure above the liquid.
In practice, hydrostatic level measurements can use immersion probes and sealed cable assemblies to detect the head of liquid pressure above the probe inlet. Alternatively, the pressure sensor can be mounted externally on the bottom of the tank or vessel. A differential pressure sensor can be used to provide a single output for a sealed tank. The difference between two input pressures representing tank level and surface air pressure. Or the two sensors and outputs can simply be measured separately.
In addition, differential pressure sensors can also be used to measure gas flow, liquid level, etc.
A method of measuring gas flow through the difference between flow tube pressure and atmospheric pressure. Find the flow tube static pressure. The square root of static pressure is proportional to flow, giving flow. The liquid level measurement method measures the pressure difference between the high and low liquid levels. Then calculate the height of the liquid surface according to the density of the liquid.
The flow measurement is realized by differential pressure measurement. That is to say, the measurement is carried out by using the working principle that there is a certain relationship between the pressure difference and the flow rate generated when the medium fluid flows through the throttling device.
With the continuous development of flow sensors, more and more types of flow sensors are gradually coming out. They each have their own advantages and disadvantages. When users choose flow sensors, they should choose the appropriate sensor according to their own needs. .
The differential pressure flow sensor is an instrument that calculates the flow rate based on the differential pressure generated by the flow detection device installed in the pipeline, the known fluid conditions and the geometric dimensions of the detection and pipeline.
When the fluid filled with the pipeline flows through the throttling piece in the pipeline, the flow velocity will form a local contraction at the throttling piece. Therefore, the flow velocity increases and the static pressure decreases. Therefore, a pressure difference is generated before and after the throttling piece. The greater the flow rate, the greater the pressure difference. In this way, the flow rate can be measured according to the pressure difference.
Differential pressure online density meter (also known as online density transmitter) is a device for continuous online measurement of liquid concentration and density. It can be directly used in industrial production processes. The differential pressure sensor is one of the core components.
The intelligent online density meter adopts the principle of differential pressure density meter, which can calculate the density value according to the differential pressure value of the medium at a certain vertical distance, and automatically perform temperature compensation. It has high precision and good reliability. It is easy to install and use.
The two-wire density transmitter is mainly used for industrial process control. The online density meter generates a corresponding 4-20mA signal according to the concentration and density. It can be remotely calibrated and monitored through digital communication.
Pressure Sensor Applications in Various Industries
Pressure Sensor in Petrochemical Industry Applications
Pressure sensor is one of the most commonly used measuring devices in petrochemical automatic control.
In some large-scale chemical projects, almost all pressure sensors are applied to differential pressure, differential pressure, high temperature, absolute pressure, gauge pressure, high pressure, low temperature, and remote flange pressure sensors of various materials and special processing.
It is not difficult to see that the petrochemical industry has a relatively concentrated demand for pressure sensors in terms of reliability, stability and high precision.
However, reliability and many additional requirements (such as range ratio, bus type, etc.) depend on the design structure, process and material level of the transmitter.
The stability and measurement accuracy of the pressure sensor can ensure the stability and high precision of the pressure transmitter. The measurement accuracy and response speed of the pressure sensor correspond to the measurement accuracy of the pressure transmitter. The temperature and static pressure characteristics and long-term stability of the pressure sensor correspond to the stability of the pressure transmitter.
The petrochemical industry’s demand for pressure sensors is mainly reflected in measurement accuracy, response speed, temperature resistance, static pressure characteristics and long-term stability.
The current miniature pressure sensor is mainly a new type of pressure sensor manufactured by using semiconductor materials and MEMS technology. It has the advantages of high precision, high sensitivity, small size, corrosion resistance, low cost, and good dynamic characteristics.
Pure single crystal silicon material is prone to fatigue, and micro pressure sensors made of this material have good long-term stability. At the same time, the miniature pressure sensor increases the temperature compensation accuracy, which greatly improves the temperature characteristics and measurement accuracy of the sensor. If two miniature pressure sensors are integrated, static pressure compensation can be implemented to improve the static pressure characteristics of the pressure sensor.
At present, micro pressure sensors have many advantages that traditional pressure sensors do not have. It is very suitable for the demand of pressure sensor in petrochemical industry.
Pressure Sensor in City Power Gas Industry Applications
Water, electricity, and gas are closely related to people’s lives. Its stable and safe transportation is very important. In order to ensure the normal use of this important urban living resource, a sufficiently stable and accurate instrument is required to perform real-time numerical measurement of related equipment. .For maintenance personnel to monitor equipment operation. Pressure transmitters meet this requirement.
For example, pressure transmitters can monitor the pressure of gas pipelines in real time. Once a leak occurs, the pipeline pressure will drop. Such as exceeding the preset safe pressure value. An alarm will be triggered and an abnormal location will be prompted.
Through the intelligent gas pipeline network, subsystems such as automatic control of fusion stations, video surveillance, pressure regulator pressure monitoring, leakage monitoring in confined spaces, and remote transmission of industrial user data monitoring can be connected. Realize 24-hour all-round uninterrupted monitoring. Transform “unmeasurable risk” into “preventable and controllable”.
Pressure Sensor in Paper Industry Applications
Pressure Sensor in Paper Industry Applications
Pulp and paper, used where resistance to chemical liquids, corrosive liquids, etc. is required.
In the material preparation section of the papermaking industry, the pressure transmitter is mainly involved in the flow measurement of the pulp, water and acid or alkali during the pulping process. Therefore, it is necessary to choose carefully when selecting the electrode material.
In the screening and bleaching section, the lining material of the pressure transmitter should preferably be PFA or PTEE.
Some of the raw materials and various chemical reagents used in the paper industry are corrosive. The measuring equipment used in this industry must first have strong corrosion resistance, and can accurately measure the relevant parameters of the liquid level such as pulp with complex components. Pressure change The feeder also has a place in the paper industry because of its anti-corrosion design.
Pressure Sensor in Steel-Metallurgical Industry Applications
When it comes to the steel industry, many people’s first impression is high temperature and high pressure. Thousands of degrees of high temperature can melt many materials. Huge pressure is also unbearable for many measuring instruments. Therefore, steel has high requirements for the use of measuring tools.
Pressure sensors with high temperature and high pressure capabilities are accepted by the iron and steel metallurgy industry.
Pressure Sensor in Water Supply-Wastewater Treatment Industry Applications
In the water and wastewater industry, the reliability of instrumentation is critical. The use of pressure transmitters can provide an important means for system protection and quality control.
Even in harsh or aggressive media in applications such as desalination plants or sludge treatment. The pressure transmitter is still able to operate stably. At the same time, the excellent anti-vibration performance enables it to be installed on the pump. This advantage makes pressure transmitters ubiquitous in the water treatment industry.
Also in water conservancy and hydropower, pressure transmitters also play a pivotal role. Because the level of automation is one of the important indicators to measure the modernization level of hydropower plants.
If the computer monitoring system of a hydropower plant is compared to the brain of an automation system. Then the pressure, temperature, flow, liquid level and other sensors are the eyes and ears of the computer monitoring system to complete the process monitoring and control.
Pressure Sensor in Machinery, Shipbuilding Industry Applications
It is used in places where stable measurement is required under strict control and high precision conditions. In general, pressure transmitters are mainly used to measure the pressure and liquid level of the medium. In the production of our machinery and shipbuilding industries, pressure sensors are widely used.
Pressure Sensor in Medical Application
With the development of the medical equipment market, higher requirements are put forward for the use of pressure sensors in the medical industry. Such as accuracy, reliability, stability, volume, etc. need to be improved. Pressure sensors have good applications in minimally invasive catheter ablation and temperature sensor measurement.
Pressure Sensor in Hydraulic System Applications
The pressure sensor is mainly used in the hydraulic system to complete the closed-loop control of the force. When the control spool moves suddenly, a peak pressure several times the system working pressure will be formed in a very short time.
In typical mobile machinery and industrial hydraulics, if such extreme conditions are not considered in the design, any pressure sensor will be destroyed very quickly. Shock-resistant pressure sensors are required.
There are two main methods for the pressure sensor to achieve impact resistance, one is to change the strain gauge chip, and the other is to connect an external coil. Generally, the first method is used in the hydraulic system, mainly because of the convenience of installation. Another reason is that the pressure sensor is subjected to constant pressure pulsations from the hydraulic pump.
Pressure Sensor in Safety Control System Applications
Pressure sensors are often used in safety control systems, mainly for the safety management system of the air compressor itself. There are many sensor applications in the field of safety control, and pressure sensors are a very common sensor. It is not surprising that they are used in safety control systems.
The application in the field of safety control is generally considered from the aspect of performance, from the consideration of price, and from the consideration of the safety and convenience of actual operation. It has been proved that the effect of choosing a pressure sensor is very good.
The pressure sensor uses the processing technology of mechanical equipment to install some components and signal conditioners on a small chip. So small size is also one of its advantages. In addition, cheap price is also another major advantage of it.
To a certain extent, it can improve the accuracy of system testing. In the safety control system, the pressure brought by the compressor is controlled to a certain extent by installing a pressure sensor in the pipeline equipment at the gas outlet. This is a certain protection measure and a very effective control system.
When the compressor starts normally, if the pressure value does not reach the upper limit, then the controller will open the air inlet to make the equipment reach the maximum power through adjustment.
Pressure Sensor in Injection Mold Applications
Pressure sensors play an important role in injection molds. The pressure sensor can be installed in the nozzle of the injection molding machine, the hot runner system, the cold runner system and the cavity of the mold. It can measure the flow of plastic from the nozzle of the injection molding machine to the Plastic pressure somewhere between cavities.
Pressure Sensor in Monitoring Mine Pressure Applications
There are many kinds of pressure sensors, and based on the special environment of mine pressure monitoring, mine pressure sensors mainly include: vibrating wire pressure sensors, semiconductor piezoresistive pressure sensors, metal strain gauge pressure sensors, differential transformer pressure sensors, etc. More about: Diaphragm pressure gauge working principle.
These sensors are widely used in the mining industry. Which sensor to use depends on the specific mining environment.
Pressure Sensor in compressors, air-conditioning refrigeration equipment Applications
Pressure sensors are often used in air compressors and air-conditioning and refrigeration equipment. These sensors are small in size and easy to install. The pressure guide port generally adopts a special valve needle design.
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Sino-Inst is a manufacturer of pressure sensors. We offer more than 50 types of pressure sensors. Main products include compact pressure transmitters, industrial pressure transmitters, differential pressure transmitters, single crystal silicon pressure transmitters, diffused silicon pressure transmitters , Diaphragm pressure transmitter, high temperature pressure transmitter, explosion-proof pressure transmitter, pressure transmitter, custom pressure transmitter, with remote pressure transmitter, 316 diaphragm pressure transmitter.
The pressure sensor is mainly used to measure the pressure and liquid level of the medium. In industrial production, it is widely used. Sino-Inst pressure transmitter adopts high-quality diffused silicon type, and the pressure transmitter adopts a dedicated integrated module. Fine temperature, zero point, full scale and nonlinear compensation. Realize accurate measurement and transmission of pressure changes in liquid, gas, steam and other media. Realize the ideal monitoring of changes in pressure and vacuum media in various places for enterprises, scientific research institutes and other departments.
Sino-Inst’s pressure sensors are the most commonly used sensors in industrial applications. Widely used in water conservancy and hydropower, railway transportation, intelligent building, production control, aerospace, military industry, petrochemical industry, oil well, electric power, ship, machine tool, pipeline and other industries.
Sino-Inst’s entire team is well trained, so we can ensure that each customer’s needs are met. If you need any help with your product requirements, whether it is a pressure sensor, level sensors, or other equipment, please give us a call.
Request a Quote
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Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
High pressure rotameter is suitable for flow measurement of high pressure liquid and gas. Standard type rotameter: DN15-DN50, can withstand 4.0MPa. High pressure rotameter: DN15-DN50, can withstand 25MPa. The pressure level of the jacket is 1.6MPa, and the special type should be negotiated with our engineers before selecting and ordering. High temperature metal tube rotameter can be applied to temperature range: 100℃~450℃ The high-pressure rotameter adopts an advanced magnetic sensor that detects the change of the magnetic field angle without contact. And with a microprocessor system. It can realize liquid crystal indication, accumulation, and remote transmission (4-20Ma). Pulse output, upper and lower limit alarm output and other functions. This type of intelligent signal transmitter has high precision and reliability.
The high-pressure metal tube rotameter is the force that the upper and lower ends of the float generate differential pressure to form a rising force when the measured medium passes through the conical measuring tube from bottom to top.
When the lifting force on the float is greater than the weight of the float immersed in the fluid, the float will rise. The area of the annulus will increase accordingly. The fluid velocity at the annulus will drop immediately. The differential pressure at the upper and lower ends of the float will decrease. The float is stabilized at a certain height until the lift force is equal to the weight of the float immersed in the fluid.
The height of the float position corresponds to the flow rate of the measured medium.
The float has a built-in magnet. When the float moves up and down with the medium, the magnetic field changes with the movement of the float.
a. For the local type, the rotating magnet in the local indicator is coupled with the magnetic steel in the float to rotate. At the same time, the pointer is driven to indicate the flow rate at this time through the dial.
b. For the intelligent type, the change of the magnetic field is converted into an electrical signal by a solid-state magnetic sensor in the intelligent indicator. After A/D conversion, microprocessor. D/A output, LCD liquid crystal display, to display the flow rate size and cumulative flow.
All-metal structure design. Sturdy, simple, high pressure resistance, high temperature resistance, anti-corrosion, long service life;
Short stroke, total height 250mm, easy installation;
The mechanical pointer indicates the instantaneous flow on the spot. LCD liquid crystal displays the instantaneous flow and cumulative flow;
Intelligent indicator. Using signal acquisition and processing chip, modular design, no magnetic lag;
With data recovery, data backup, power failure protection and error self-diagnosis functions;
HART type indicator, two-wire 24VDC power supply. 4-20mA standard current signal output superimposed with HART protocol;
Parameter configuration and on-site adjustment can be performed through the HART communication hand-held communicator;
Connect with the PC serial port. Through the Windows program, the instrument can be calibrated on site;
Can be used in flammable and explosive hazardous situations;
Various installation forms such as vertical, horizontal, top in and bottom out, bottom in and side out, side in and side out. Flange or threaded connection.
High Pressure Rotameter Applications:
The metal tube rotameter has a simple structure, reliable operation, high accuracy and wide application range. Can withstand higher pressures than glass rotameters.
LZ series flowmeters have local indication, electric remote transmission, limit switch alarm, corrosion resistance, jacket type, damping type and explosion-proof varieties.
It is widely used in the measurement and automatic control of liquid and gas flow in national defense, chemical industry, petroleum, metallurgy, electric power, environmental protection, medicine and light industry and other departments.
What Is Difference Between Rotameter and Flow Meter?
A rotameter is a device that measures the flow rate of liquid or gas in a closed system. It consists of a float that moves up and down in a tube, based on the fluid’s flow rate. The faster the fluid flows, the higher the float rises.
A flowmeter is a device that measures the volume of liquid or gas that flows through it. There are many different types of flowmeters, each designed to measure different types of fluids. For example, positive displacement flowmeters measure the volume of fluid that passes through them, while rotameters measure the rate of flow.
Choosing the right flow meter can be difficult, because there are so many different types available on the market. How do you know which one is right for your specific application?
Sino-Inst offers a wide range of high pressure flow meters that are specifically designed to operate in demanding applications. Our high pressure flowmeters are made from stainless steel construction and are ideal when measuring the flow of fluids under high pressures.
Yes, rotameters are affected by changes in pressure. When the pressure decreases, the rotameter will read a lower flow rate. Similarly, when the pressure increases, the rotameter will read a higher flow rate. This is because the rotameter measures the fluid’s velocity, and changes in pressure will affect the fluid’s velocity. Therefore, it is important to keep the rotameter’s pressure at a constant level if you want to accurately measure the flow rate.
The flow detection element of the rotameter is composed of a vertical tapered tube that expands from bottom to top and a float group that moves up and down along the axis of the tapered tube. Below, I will give you a specific introduction to the classification of rotameters.
Glass rotameter:
Glass rotameters are mainly used in various departments such as the chemical industry, petroleum, light industry, medicine, fertilizer, chemical fiber, food, dyes, environmental protection, and scientific research. Used to measure the flow of single-phase non-pulsating (liquid or gas) fluids. The anti-corrosion glass rotor flowmeter is mainly used for the detection of corrosive liquid and gas medium flow. Such as strong acid, strong acid, oxidant, strong oxidizing acid, organic solvent, and other corrosive gas or liquid medium flow detection.
The main parts such as the liquid plastic tube rotameter cone tube are made of AS, ABS plastic. Has relatively good corrosion resistance. The product also has the characteristics of reasonable structure, small size, lightweight, and the tapered tube is not easily broken. The plastic tube rotor flowmeter can be widely used in chemical, environmental protection, food, and other industrial sectors.
Plexiglass rotameter:
Plexiglass rotameter is divided into panel type plexiglass rotameter and pipeline type plexiglass rotameter.
Plexiglass rotameter also has the characteristics of high transparency, intuitive reading, not easy to break, lightweight, long life, and convenient installation and connection. However, the tapered glass tube of plexiglass cannot be used for organic solvents (such as trichloroethylene, dichloroethane).
Metal tube rotameter:
Metal tube rotameter is divided into on-site pointer indication type and remote transmission type.
Metal float flowmeter is a kind of flow measuring instrument commonly used in industrial automation process control. It has the characteristics of small pressure loss, large detection range (range ratio 10:1), and convenient use. It can be used to measure the flow of liquid, gas, and steam. It is especially suitable for medium flow measurement with low flow velocity and small flow.
The metal float flowmeter has a local display type and an intelligent remote transmission type. With pointer display. Instantaneous flow, cumulative flow, liquid crystal display. Upper and lower limit alarm output. Cumulative pulse output, standard two-wire 4-20mA current output, and other forms. Provide users with a very wide choice of space. In addition, the instrument uses a high-quality MCU micro-processing system. Ensure the excellent performance of the flowmeter in various applications.
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High Pressure Rotameter for Liquids/gas-Upto 25 Mpa is mainly used for small and medium diameter flow measurement. It can measure liquid, gas, steam, etc. Complete product series specifications, in all walks of life are widely used.
High Pressure Rotameter for Liquids/gas-Upto 25 Mpa can be stable flow measurement without modifying the pipeline. This greatly meets the measurement needs of many applications. From small tubes to large tubes can be used.
Sino-Inst’s High Pressure Rotameter for Liquids/gas-Upto 25 Mpa, made in China, have good quality, with better prices. Our flow measuring instruments are widely used in China, India, Pakistan, USA and other countries.
Sino-Inst’s entire team is well trained, so we can ensure that each customer’s needs are met. If you need any help with your product requirements, whether it is a metal tube flow meters, level sensors, or other equipment, please give us a call.
Request a Quote
Please enable JavaScript in your browser to submit the form
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
What is the difference between a resistance temperature detector (RTD) and a thermocouple? Both RTDs and thermocouples are sensors used to measure heat such as Fahrenheit and Kelvin. These devices are used in a wide range of applications and settings, often presenting people with the dilemma of choosing between RTDs or thermocouples. Each temperature sensor has its own advantages and disadvantages that make it suitable for certain conditions and environments.
RTDs are made of metal wires, usually copper or platinum, that offer resistance to the flow of electricity. The RTD’s resistance changes when its temperature changes, allowing it to be used as a gauge for measuring heat. RTDs are considered to be more accurate than thermocouples as they have a linear relationship between resistance and temperature. RTDs are also less affected by electromagnetic fields than thermocouples.
RTD Working Principle
The full English name of RTD is “Resistance Temperature Detector”, so to be precise, it should be translated as “Resistance Temperature Detector”.
RTD is a special kind of resistor whose resistance value increases as the temperature increases and decreases as the temperature decreases. In industry, this feature is used for temperature measurement, so RTD is also commonly known as “thermal resistance”.
Not all metals are suitable for making RTDs. Materials that meet this characteristic need to meet the following requirements:
The resistance value of the metal has a linear relationship with the temperature change energy;
The metal is more sensitive to temperature changes, that is, the resistance change (temperature coefficient) caused by unit temperature changes is relatively large;
The metal can resist fatigue caused by temperature changes and has good durability;
There are not many metals that meet this requirement. Common RTD materials are: platinum (Pt), nickel (Ni), and copper (Cu).
Take platinum thermal resistance as an example. According to the different resistance values, it can be divided into Pt50, Pt100, Pt200, Pt500 and Pt1000.
The numerical value in the name indicates the resistance value of the thermal resistance at 0°C.
For example: Pt100, indicating that the resistance value of the sensor at 0°C is 100Ω. And Pt1000, it means that the resistance value of the sensor at 0 ℃ is 1000Ω. The resistance value of RTD thermal resistance at different temperatures can be approximated by the formula: R=R0(1+αT).
in: 1) R0 represents the resistance value of RTD at 0℃; 2) a is called the temperature coefficient, which represents the change value of the resistance at unit temperature; 3) T represents the measurement temperature, the unit is °C;
According to the number of lead wires of RTD thermal resistance, RTD can be divided into two-wire, three-wire and four-wire.
The lead of the two-wire RTD is to directly lead out two wires at both ends of the resistor to the temperature measurement module. The temperature measurement module adopts the principle of bridge balance, and RTD is used as one arm of the bridge to measure.
A three-wire RTD can largely eliminate the influence of the sensor leads themselves on the measurement results. The detection accuracy is greatly improved compared to the two-wire system.
Resistance Temperature Detector advantages
No compensation line is required, and the price is cheap; It can transmit electrical signals over long distances; High sensitivity and strong stability; Good interchangeability and high precision.
Disadvantages of thermal resistance:
Although thermal resistance is widely used in industry. But it requires power excitation. Temperature changes cannot be measured instantaneously. The temperature measurement range is limited and the application is limited.
What is Thermocouple?
Thermocouples, on the other hand, are made of two different types of metals that are joined together at the sensor end. The junction between these two metals produces a voltage that is proportional to the temperature difference between the junction and the measuring point. Thermocouples are less expensive than RTDs and can measure a wider range of temperatures. They are also faster at responding to changes in temperature.
Thermocouple Working Principle
A thermocouple is a temperature sensing element. It converts the temperature signal into a thermoelectromotive force signal and converts it into the temperature of the measured medium through an electrical instrument.
The basic principle of thermocouple temperature measurement is that two homogeneous conductors of different compositions form a closed loop. When there is a temperature gradient at both ends, a current will flow through the loop. At this time, there is a seebeck electromotive force – thermal electromotive force between the two ends. This is called the Seebeck effect.
The two homogeneous conductors with different compositions are the hot electrodes, and the end with the higher temperature is the working end. The end with the lower temperature is the free end. The free end is usually at some constant temperature.
According to the functional relationship between thermoelectromotive force and temperature, a thermocouple indexing table is made. The index table is obtained under the condition that the free end temperature is at 0°C. Different thermocouples have different scales.
When a third metal material is inserted into the thermocouple loop. As long as the temperature of both junctions of the material is the same. The thermoelectric potential generated by the thermocouple will remain constant. That is, it is not affected by the access of the third metal into the loop.
Therefore, when measuring the temperature of the thermocouple, the measuring instrument can be connected. After measuring the thermoelectromotive force, the temperature of the measured medium can be known.
Thermocouple Advantages:
High measurement accuracy: The thermocouple is in direct contact with the measured object and is not affected by the intermediate medium.
Fast thermal response time: Thermocouples are sensitive to temperature changes.
Large measurement range: thermocouples can measure temperature continuously from -40 to +1600 °C.
Reliable performance and good mechanical strength.
Long service life and easy installation.
Types and structures of thermocouples
Types of thermocouples Thermocouples include k type (nickel-chromium-nickel-silicon), n-type (nickel-chromium-silicon-nickel-silicon-magnesium), e-type (nickel-chromium-copper-nickel), j-type (iron-copper-nickel) , t-type (copper-copper-nickel), s-type (platinum-rhodium 10-platinum), r-type (platinum-rhodium 13-platinum), b-type (platinum-rhodium 30-platinum-rhodium 6) and so on.
Structural form of thermocouple: The basic structure of a thermocouple is a thermal electrode, an insulating material and a protective tube. Display instrument, recording instrument or computer and other supporting use. In field use, thermocouples suitable for various environments are developed according to various factors such as the environment and the measured medium.
RTD stands for Resistance Temperature Detector, but is also known as PRT (Platinum Resistance Thermometer).
A platinum resistance thermometer (PRT) is an RTD that uses platinum as the sensing element. The most common PRTs are Pt100, Pt500 and Pt1000. (PRT is just a more specific name for RTD)
The first step in identifying an RTD is to find out how many lines it has (2, 3 or 4). Then you can connect the RTD to the multimeter. If it’s a pt100, it should read between 107-110Ω at room temperature. But if it’s a pt1000. You should get a reading of 1007 – 1100Ω. This confirms it’s a Pt1000.
PLEASE NOTE: These readings are standard for new RTD sensors. If the sensor is damaged or used continuously. The readings may vary.
The international standard IEC 60751:2008 defines the resistance versus temperature characteristics of RTDs. Within this standard, in order to provide good interchangeability, there are standards of accuracy. Class A and Class B are two accuracy standards. We provide a tolerance reference table.
We get asked this question a lot, but Pt100s and Pt1000s are two types of RTDs (Pt500s are another type of RTD, but now obsolete).
RTDs use cables because they detect temperature by calculating resistance changes in the material. So you can simply order RTDs with long leads or buy additional cables to expand on your own.
When choosing an RTD, the following factors must be considered:
What temperature are you measuring (surface or immersion in solid, liquid or gas)?
If a fast response time is a must, see the RTD Technology page for various factors in selecting a response time.
Fits the specific dimensions required for your application, such as probe diameter, probe length, compression fittings, required connector types, etc.
Do you need special sheath materials?
Do you need to calibrate the sensor?
Does the sensor need to be resistant to chemicals/abrasion/vibration or any other environmental factors?
Is there high electromotive force (electromagnetic interference) in power switching, rectification or radio waves?
Any other installation considerations? (eg sensor needs to be bent to form before installation)
Distance between sensing area and instrument
Sensing ambient temperature over sensor length
Connection Preferences
Current wiring configurations such as 4-wire sensors will not be compatible with 3-wire configurations.
As a rule of thumb, RTDs should be immersed 4 times the length of the element. (Flat-film elements are typically 2-3mm, while wire-wound elements are about 15mm or more).
We are often asked this question, but Pt100 thermocouples do not exist. A thermocouple is a type of sensor, and a Pt100 is a type of RTD, another type of sensor.
A Pt200 sensor is an RTD, Pt200s have a resistance of 200 ohms (Ω) at 0ºC. The Pt200 sensor is now obsolete and has been replaced by the Pt100 and Pt1000 sensors. The Pt500 sensor is also an outdated RTD.
A Pt500 sensor is an RTD, Pt500s have a resistance of 500 ohms (Ω) at 0ºC. The Pt500 sensor is now obsolete and has been replaced by the Pt100 and Pt1000 sensors. The Pt200 sensor is also an outdated RTD.
Conclusions, which one should you use?
It really depends on the specific application and what is more important: accuracy or speed. If you need to measure very high or very low temperatures, a thermocouple is the better choice. If you need more accuracy, then an RTD is the way to go.
Standard Platinum Rhodium Thermocouple-Platinum Thermocouple Standard Platinum Rhodium Thermocouple is a temperature measurement standard device produced by our company. There are two types of standard platinum-rhodium 10-platinum thermocouple and standard…
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Sino-Inst is Manufacturer of RTD & Thermocouples for temperature measurement. We supply more than 20 kinds of RTD & Thermocouples. 40% RTD, 60% Thermocouples.
RTD & Thermocouples for diesel fuel measurement are mainly used for temperature measurement of various meadium.
RTD & Thermocouples enable stable temperature measurement. This greatly meets the measurement needs of many applications.
Sino-Inst’s RTD & Thermocouples for temperature measurement, made in China. Having good Quality, With better price. Our temperature measurement instruments are widely used in China, India, Pakistan, the US, and other countries.
The entire team at Sino-Inst’s has received excellent training, so we can ensure that every client’s needs are met. For assistance with your product requirements, whether it’s a RTD & Thermocouples for temperature measurement, flow sensor, or other device, give us a call.
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Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Mechanical diesel flow meter is a volumetric meter for continuous or intermittent measurement and control of diesel or other liquid flow in pipelines. It has many advantages such as large measuring range, high accuracy, small pressure loss, strong viscosity adaptability, ability to measure high temperature and high viscosity liquid (diesel), convenient calibration, and installation suggestions. It is suitable for flow measurement in petroleum, chemical, chemical fiber, transportation, commerce, food, medicine and health departments.
Sino-Inst mechanical diesel flow meter solutions come together here and allow you to select from various flow rates or technologies. When it comes to technologies, the turbine or oval gear type diesel flow meters can all be purchased directly from our website. We have a variety of mechanical diesel flow meters suitable for most fuels, including diesel, bio-diesel, kerosene, gasoline, oil, DEF, heating oil, grease and certain chemicals. mechanical Diesel fuel meters are available in several sizes from 1/2″ up to 8 “.
Diesel is a kind of light petroleum, which belongs to the fuel of diesel engine. The use of high-speed diesel engines on cars is more fuel-efficient than gasoline engines.
Diesel demand is growing faster than gasoline. Diesel engines have higher thermal efficiency and higher power than gasoline engines. The fuel consumption per unit is low and relatively economical, so the application is increasing day by day. In many occasions, it needs to be measured.
For oil tanker or diesel storage tank pipeline transportation, it is more suitable to choose a flowmeter with higher measurement accuracy. Because it is not only convenient for trade settlement, but also high precision. The measurement is accurate and can be used for a long time.
According to the role of diesel: the use can be divided into marine diesel engine, locomotive diesel engine, automobile diesel engine, power generation diesel engine, agricultural diesel engine, construction machinery diesel engine, etc.
Diesel Fuel: Diesel fuel is primarily diesel. Light diesel oil is usually used for high-speed diesel engines. Light diesel or heavy diesel for medium and low speed diesel engines.
Oval gear flow meters are our most commonly used Mechanical Diesel Flow Meters.
The oval gear flowmeter is composed of a metering box and a pair of elliptical gears installed in the metering box, and the upper and lower cover plates form a sealed crescent-shaped cavity (due to the rotation of the gear, it is not sealed) as the calculation unit of a displacement .
The flow meter is mainly composed of a housing, a counter, an elliptical gear, and a coupling (magnetic coupling and axial coupling), etc. As shown in the figure.
1.Counter 2. Transmitter
3. Accuracy adjuster (used above DN50)
4. Sealed coupling
5. Front cover 6. Cover plate
7. Oval gear 8. Shell
9. Rear cover
When the measured liquid enters the flowmeter through the pipeline, the pressure difference generated at the inlet and outlet pushes a pair of gears to continuously rotate, and the liquid measured by the crescent-shaped cavity is continuously transported to the outlet. The product of four times the secondary displacement is the total amount of the measured liquid flow.
The elliptical gear generates a torque to make it rotate under the action of the pressure difference △p of the measured medium.
The rotor 1 and the rotor 2 are alternately driven by one to rotate the other. There are two magnets on each rotor as signal generating elements. There is a magnetic signal detecting element at the center of the two axes at the bottom of the cavity. Whenever the magnet turns to the detecting element, the sensor counts as a pulse.
Each pulse corresponds to a certain amount of medium discharge F, F=XXml/p, so the volume flow Qm per unit time can be obtained: Qm=F*H, F is the amount of medium removed by each pulse; H pulse per unit time number.
Advantages of Oval Gear Mechanical Diesel Flow Meters
High measurement accuracy: 0.2 and 0.5;
The mechanism is simple, firm and reliable;
Especially suitable for measuring medium with high viscosity. And it is not sensitive to changes in the viscosity of the liquid being measured;
Easy to install. No straight pipe sections are required before and after the flowmeter. Even if the flowmeter is close to valves, elbows, shrinks, and expansions, there is no need to add straight pipe sections.
In order to prevent the gear of the flowmeter from being stuck by impurities. A filter must be installed upstream of the flow meter
It is a type of flowmeter, and the measurement component is a purely mechanical structure, which is a mechanical flowmeter. Such as oval gear flowmeter.
Take an oval gear flowmeter as an example. Under the action of fluid flow, a pressure difference is formed between the inlet and outlet of the instrument. A pair of oval gears are constantly rotating on the shaft. The cavity between its gears is filled with liquid.
Commonly used fuel flowmeters include turbine flowmeters, circular gear flowmeters, oval gear flowmeters, mass flowmeters, etc.
Industrial oil flow meters measure the volume or mass of oil. Can realize the mutual conversion of volume and mass.
The main industrial oils are hydraulic oil. Gear Oil. Turbine oil. Compressor oil. Refrigeration oil. Transformer oil. Cylinder oil, heat treatment oil, heat transfer oil, etc. Of course, edible oil can also be produced in the industry. In addition, there are greases with lubricating oil as base oil and thickening agent.
Therefore, whether it is a company that uses, trades, or produces oil, it needs to accurately measure the oil flow.
There are many common oil flow meters, such as turbine flow meters, positive displacement flow meters, gear flow meters, mass flow meters, etc.
Crude Oil Flow Meter refers to a type of flow meter that can accurately monitor and measure the flow of crude oil. Crude oil is an industrial raw material with…
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Industrial oil flow meters measure the volume or mass of oil. Can realize the mutual conversion of volume and mass. The main industrial oils are hydraulic oil. Gear Oil. Turbine…
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Sino-Inst offers a variety of hydraulic oil flow Meters for flow measurement. If you have any questions, please contact our sales engineers. Hydraulic oil flow meters measure the flow of…
Sino-Inst is Manufacturer of Mechanical Diesel Flow Meters for diesel flow measurement. We supply more than 20 kinds of Mechanical Diesel Flow Meters. 80% oval gear flow meter, 20% other types flow sensors.
Mechanical Diesel Flow Meters for diesel fuel measurement are mainly used for flow measurement of various oils pipes.
Mechanical Diesel Flow Meters enable stable flow measurement. This greatly meets the measurement needs of many applications. Can be used from small to large pipes.
Sino-Inst’s Mechanical Diesel Flow Meters for diesel fuel flow measurement, made in China. Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, the US, and other countries.
The entire team at Sino-Inst’s has received excellent training, so we can ensure that every client’s needs are met. For assistance with your product requirements, whether it’s a Mechanical Diesel Flow Meters for diesel measurement, flow sensor, or other device, give us a call.
Request a Quote
Please enable JavaScript in your browser to submit the form
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Crude oil measurement is important to the petrochemical industry. To control costs and improve efficiency. Effective crude oil level measurement regulation has become a challenge for many plants.
If you’re looking for a reliable and accurate way to measure the level of crude oil, the 80G radar level meter is the perfect choice. With its ability to handle various types of liquids and vapors, this meter is ideal for use in oil refineries and other industrial applications. The 80G radar level meter also offers a wide range of features and options, making it the perfect choice for Crude oil measurement application.
What everyone thinks must be the characteristics of the medium of crude oil.
Crude oil, usually referred to as unprocessed petroleum, is a viscous liquid. When the temperature is between minus 50 ℃ and 35 ℃ above zero, solidification will occur, changing from a liquid shape to a solid shape.
From this information, crude oil is viscous and tends to solidify when the temperature drops to the freezing point. Therefore, in order to ensure that the crude oil is always in a liquid state, the storage tank for storing the crude oil may be accompanied by a heating device. This is one of the working conditions.
Of course, there are many factors that can affect the accuracy of crude oil measurement, including the type of tank, the temperature and density of the oil, and the presence of water or sediment in the tank. Inaccurate measurements can lead to costly errors in production, transportation and refining operations.
Crude oil is typically stored in large tanks ranging in size from 10,000 to 50,000 barrels (4.5 to 22.5 million liters). These tanks are often located in remote areas, making it difficult to access them for monitoring and inspection. In addition, the oil in the tanks is typically very hot – up to 150 degrees Fahrenheit (65 degrees Celsius) – and under high pressure. These conditions can make it difficult to get accurate readings of the oil level.
Water and sediment can also accumulate in the bottom of the tank, which can throw off measurements of the oil level. Inaccurate measurement of the crude oil level can lead to over- or under-estimating the amount of oil in a tank, which can have serious consequences for production, transportation and refining operations.
To ensure accurate crude oil measurement, it is important to use a reliable and well-calibrated measuring device. In addition, regular monitoring and inspection of the tank is essential to identify any potential problems that could affect the accuracy of the measurements.
Crude oil measurement – Radar level meter measuring vaulted buffer tank
Distinguished from the shape, Crude oil storage tanks are divided into lying tanks, round tanks, conical tanks, arch-shaped tanks and so on. Distinguished from the use, storage tanks are divided into process tanks and metering tanks.
So, if the radar level meter is used to measure the crude oil in the process, and the crude oil is installed in the vaulted tank. What should you pay attention to Crude oil measurement?
First of all, process tank measurement should pay attention to the selection and installation of radar level meter. The process tank, is not used for direct trading. So the accuracy requirement is not very high. But stability is an aspect that needs attention.
Radar level meter selection, you can consider high-frequency radar level meter. When installing, pay attention to whether there are stirring devices or heating devices in the tank. If there is, pay attention to avoid these obstacles. To avoid causing inaccurate measurement, or even the inability to measure the situation.
From the arch-shaped tank alone, the selection of radar level meter is basically unaffected by the tank, but the installation needs to pay attention to the following. From the arch-shaped tank alone, the radar level meter selection is basically unaffected. But the installation needs to pay attention to the following. Normally, the radar level meter is installed in the vaulted tank. Do not install in the middle of the filling top. To avoid the generation of indirect echoes. Affect the real echo.
Finally, radar level meter to measure crude oil, pay attention to the characteristics of crude oil. Select the appropriate radar level meter model.
According to the information, for a long time in the past, the crude oil vault tank level measurement, are used to manually check the ruler + steel band level meter. As a result, there were often cases of stuck steel belt and stuck shaft.
The result of such a result is inseparable from the characteristics of crude oil. Crude oil has a certain viscosity. If there is a heating device present, there will also be water vapor present. Select radar level meter, as far as possible, choose non-contact radar level meter.
The use of the measured medium is different, the choice of level meter is different. The measured medium used in the tank is different, the choice of level meter is different. The characteristics of the measured medium are different, and the type of level meter is also different.
So no matter what kind of media measurement, we must know the working conditions, know the medium, know the use. This will ensure that the right type, the measurement can be accurate. Liquid level meter to play the maximum role.
4. You can check the readings on the radar level transmitter at any time to see how much crude oil is in the tank.
That’s all there is to it! Using a radar level transmitter is the best way to get accurate readings of the level of crude oil in a tank. If you need any help, don’t hesitate to contact Sino-Inst for assistance.
In the petrochemical industry in order for the crude oil process to run continuously and smoothly care has to be taken when storing raw and finished products. Delivery of the crude oil is via pipeline or ship and stored in a large tank until it is ready for final processing.
Accurate level measurement of products of distillation is essential whilst they are being stored in different sized tanks.
In the past, it was expensive as calibratable measuring devices were implemented for level measurement. Nowadays cheaper and low-maintenance measuring systems are used for small and medium-sized tanks. Products are now usually measured by calibratable flow meters while being moved.
It is important to measure crude oil levels for a number of reasons.
First, crude oil is a valuable commodity, and accurately measuring levels ensures that companies are correctly compensated for the product they are selling.
Additionally, precise measurement is necessary in order to maintain optimal production levels; too little oil could lead to decreased output, while too much could cause equipment failures.
Finally, monitoring oil levels can help to identify potential leaks or other issues with storage tanks and pipelines. By regularly measuring and monitoring crude oil levels, companies can ensure the safety and efficiency of their operations.
There are a few key factors that go into measuring the quality of crude oil. The first is density. This is measured by the American Petroleum Institute (API) and is expressed in degrees.
The second factor is sulfur content. This is important because it determines the amount of pollution that will be produced when the oil is burned.
Finally, viscosity is measured to determine the oil’s ability to flow. This is important for transportation and refining.
Oil is typically measured in barrels, with one barrel containing 42 gallons of oil. To measure the level of oil in a barrel, a ruler or tape measure is inserted into the barrel to determine how much oil is present. The measurements are then converted to barrels using a standard conversion factor.
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If you need to measure high temperature and high pressure (-0.1MPa-32MPa) oil storage tanks, then learn about New Choice for Heating Oil Tank Level Sensor.
80G radar level meters for Crude oil measurement are mainly used for level measurement of various oils tanks.
80G radar level meters for Crude oil measurement enable stable level measurement without tank modifications. This greatly meets the measurement needs of many applications. Can be used from small to large tanks.
Sino-Inst’s 80G radar level meters for Crude oil measurement, made in China. Having good Quality, With better price. Our level measurement instruments are widely used in China, India, Pakistan, the US, and other countries.
The entire team at Sino-Inst’s has received excellent training, so we can ensure that every client’s needs are met. For assistance with your product requirements, whether it’s a 80G radar level meters for Crude oil measurement, flow sensor, or other device, give us a call.
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
