Open Channel Flow Meter is used to continuously measure the volumetric flow of conductive liquid in open channels, culverts or Partially Filled Pipes.
Open Channel Flow Meter continuously measures fluid flow in open pipelines. Such as semi-pipe flow sewage pipes and large flow pipes without overflow weirs. Magnetic Open Channel or Partially Filled Pipe Flow Meter uses the flow rate-area method. The Open Channel Flow Meter measures the flow rate and level of the fluid in the pipeline. The user only needs to input the inner diameter of the round pipe or the width of the square pipe. The non-full pipe flowmeter will automatically calculate the flow rate. Open Channel Flow Meter can measure and display data such as instantaneous flow, velocity, and cumulative flow. Especially suitable for municipal rainwater, wastewater, sewage discharge and irrigation water pipelines.
Sino-Inst offers a variety of Magnetic Flow Meters for flow measurement. If you have any questions, please contact our sales engineers.
Features of Magnetic Partially Filled Pipe or Open Channel Flow Meter
Open Channel Flow Meter can be used for flow measurement of open partially filled pipes (round pipes, rectangular pipes or other special-shaped pipes).
Open Channel Flow Meter can be used for continuous measurement of municipal rainwater, wastewater, sewage discharge and irrigation water pipelines.
Open Channel Flow Meter can realize forward and reverse two-way flow measurement.
The sensor can work reliably for a long time under harsh scenes and sewage water quality.
The measuring range of flow velocity is 0.05-10m/s.
High flow measurement accuracy. Moreover, it is not affected by factors such as downstream, direct flow, obstruction, etc.
Large-screen, backlit LCD. The measurement data can be read clearly under strong light or at night.
The instrument display and output functions are complete. It can display data such as instantaneous flow, flow rate, cumulative flow, and has computer communication interfaces 232, 485 (optional).
With GSM and GPRS wireless data remote transmission function (optional).
With power failure timing, counting and clock functions.
Ultrasonic open channel flowmeter is used to measure the flow of fluid in the state of free surface of natural flow in a non-full tubular open channel, which is called open channel flow detection.
The measuring tank that is not full is called an open channel. The meter that measures the flow of fluid in the open channel is called an open channel flowmeter.
The ultrasonic open channel flowmeter is composed of three parts: an ultrasonic level gauge, a water measuring tank, and a flow totalizer.
Based on the flow rate-water level algorithm. Advanced flow rate measuring instrument and water level measuring instrument are adopted. A new type of intelligent flow system to ensure the accuracy of speed measurement and calculation. According to the width of the channel and the requirements of measurement accuracy. Adopted. The mathematical model of single probe method or multi-probe method for open channel flow measurement.
The automatic measurement of open channel flow usually adopts the weir level method or the velocity area method.
1. Water level method
The water level method is based on the shape of the open channel and the size of the water flow. A section of flow measuring weir trough is constructed on the open channel. The water level of the weir flow is monitored online. Then the hydraulic formula can be used to calculate the flow through the weir trough.
The flow velocity area method is a commonly used flow measurement method in open channels. There is no need to build water measuring structures. The flow rate is obtained by measuring the flow velocity and the area of the cross section.
Flow velocity area method Open channel flowmeter is a device for automatic measurement of open channel flow using velocity area method composed of flow indicator, flow meter and liquid level meter.
The flow meter can choose electromagnetic flowmeter or Doppler flow tester. If an electromagnetic flowmeter is selected, the flow rate indicator will convert the flow rate signal into a digital signal proportional to the flow rate signal, thereby realizing the flow rate measurement.
Sino-Inst is Open Channel Flow Meters suppliers, located in China. Open Channel Flow Meters products are most popular in North America, Mid East, and Eastern Europe. The United States, and India, which export 99%, 1%, and 1% of Open Channel Flow Meter respectively.
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 flow meter is the first choice for flow measurement under extreme conditions. Such as high pressure and explosion-proof.
High pressure flow meter is produced by using proprietary technology and special process. Magnetic high pressure flow meter is composed of oil high pressure electromagnetic flow sensor and high pressure electromagnetic flow converter. It is specially used to measure the volume flow of conductive liquid or liquid-solid two-phase medium such as aqueous solution, mud, cement slurry, high-pressure water injection under high-pressure conditions. It can withstand up to 42MPa, and there are no obstructive moving parts in the pipe. There is almost no pressure loss. Straight pipes require more low.
Sino-Inst offers a variety of Magnetic Flow Meters for flow measurement. If you have any questions, please contact our sales engineers.
The high-pressure electromagnetic flowmeter is a flowmeter for measuring the volume flow of conductive liquid or solid-liquid two-phase medium such as mud, cement slurry, high-pressure water injection under high pressure conditions in geology, petroleum exploration, and oilfield systems. It meets the requirements that ordinary electromagnetic flow cannot reach. High pressure resistance requirements.
Application range: Conductive fluid flow in mining energy, steel, petroleum, chemical, electric power, industry, water conservancy, and other sectors. It can also measure acid, alkali, salt and other corrosive conductive liquids.
High Pressure Flow Meter – Turbine
The high-pressure turbine flowmeter adopts full hard alloy (tungsten carbide) shielded cantilever beam structure bearing. It integrates rotating bearing and pressure bearing. It greatly improves the life of the bearing. It can work in a small amount of mud and dirt.
The sensor of the high-pressure turbine flowmeter uses a stainless steel structure. The turbine adopts 2Cr13, which has good corrosion resistance. The use of ruby bearings and cemented carbide (LT6) bushings ensure the service life and long-term stability of the turbine sensor. Samarium-cobalt permanent magnet alloy is used as a signal detector, with strong output signal and good magnetic stability. It can work normally in 0-120℃ medium.
The flowmeter itself has a self-rectifying structure, which is small, light and simple in structure. It can be assembled and disassembled in a short time, which is quite convenient to install and use.
The principle of Coriolis mass flow meter mass measurement is Newton’s second law F=Ma. When the fluid flows in the vibrating tube, it will produce Coriolis force proportional to the mass flow. When there is no fluid flowing, the vibrating tube does not produce distortion. The signals detected by the electromagnetic signal detectors on both sides of the vibrating tube are in the same phase.
When fluid passes through, the vibrating tube is twisted under the action of a torque. There will be a phase difference between the two detectors. The transmitter measures the lag time between the left and right detection signals. This time difference is multiplied by the flow calibration coefficient to determine the mass flow.
The density measurement principle of Coriolis mass flowmeter is that the vibration frequency is inversely proportional to the square root of the fluid density, and the fluid density is determined by measuring the vibration frequency. Therefore, the mass flow meter can realize the measurement of fluid mass flow and the measurement of fluid density.
Sino-Inst is High Pressure Flow Meters suppliers, located in China. High Pressure Flow Meters products are most popular in North America, Mid East, and Eastern Europe. The United States, and India, which export 99%, 1%, and 1% of High Pressure Flow Meters respectively.
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.
A pipe Flow Meter is used to measure fluid flow in pipes or open channels. Magnetic Large Dia. Pipe Flow Meter is especially suitable for large diameter pipe measurement.
There are many types of Pipe Flow Meter. For example magnetic, ultrasonic, venturi, etc. A pipe Flow Meter is an induction meter that measures the volume flow of conductive media. Liquids are conductive or water-based. Not only can it be used for general process detection. It is also suitable for the measurement of mineral pulp, paper pulp, and pasty liquids. It can also be made into a plug-in electromagnetic flowmeter. It is widely used in the flow measurement and control of production processes such as water treatment and total control of environmental sewage.
Sino-Inst offers a variety of Magnetic Flow Meters for flow measurement. If you have any questions, please contact our sales engineers.
There are no flow obstructions in the measuring tube. No pressure loss, lower requirements for straight pipe sections;
Series nominal diameters are DN15～DN3800. There are many choices of sensor lining and electrode materials;
The converter adopts a novel excitation method. Low power consumption, stable zero point and high accuracy. The flow range can reach 1500:1;
The converter and the sensor can be integrated or separated;
The converter uses a 16-bit high-performance microprocessor. 2x16LCD display. Convenient parameter setting. Reliable programming;
The flowmeter is a two-way measuring system with three totalizers inside. Forward total, reverse total, and difference total. Can display positive and negative flow. And has a variety of outputs: current, pulse, digital communication, HART;
The converter uses surface mount technology (SMT). With self-check and self-diagnosis function
The measurement is not affected by changes in fluid density, viscosity, temperature, pressure and conductivity;
Specifications of Magnetic Large Dia. Pipe Flow Meter
Caliber:
DN350-DN3800
Accuracy:
± 1.5% measured value standard ± 1.0% measured value special ± 0.5% measured value high precision
Conductivity :
5μs/cm
Measuring range :
Recommended use range: 0.5m/s～10m/s continuously adjustable Use range: 0.2m/s～15m/s continuously adjustable
Medium temperature:
-20- +150℃
Ambient temperature:
-20- +60℃
Fluid pressure:
≤ 1.6MPa
Protection level:
Sensor Converter IP67 IP67 IP68 IP67
Material quality:
The probe material is 304 stainless steel, the electrode material is 316 stainless steel, and the insulation layer is PTFE.
Electrical Interface :
M20×1.5,1/2〞NPT
Display method :
Standard two-line LCD display, which can display instantaneous and cumulative flow at the same time.
power supply:
220VAC 50HZ 24VDC
Explosion-proof grade:
Exd[ia]iam ll CT5
Signal output:
1. The switch value can be set as pulse output (1000HZ); High/low flow alarm; ATC alarm; Flow direction indication; error alarm; 2. Current output: 4-20mA output.
Configuration method:
1. Configure on-site through three manual keys. 2. On-site configuration via remote control. To 3. Perform on-site configuration through the handheld communicator. To Memory: EEPROM is a memory that will not disappear, without battery storage.
Large measuring range. The measurement is not affected by changes in temperature, density, pressure, viscosity, conductivity, etc.;
It can be installed and disassembled under continuous flow. It brings convenience to the user’s maintenance.
Compared with the general electromagnetic flowmeter, the manufacturing cost and installation cost are lower. Especially suitable for large and medium diameter pipeline flow measurement.
Pipe Flow Meter Types
Flow Metering Principals
Differential Pressure Flowmeters
Velocity Flowmeters
Positive Displacement Flowmeters
Mass Flowmeters
For Open Channel Flowmeters – weirs, flumes, submerged orifices, current meters, acoustic flow meters and more
The electromagnetic flowmeter is made according to Faraday’s law of electromagnetic induction. It is widely used in the flow measurement of various conductive liquids in industrial processes.
The main features of electromagnetic flowmeter are as follows:
There are no moving parts in the pipeline, no flow blocking parts, and almost no additional pressure loss during measurement.
The measurement results have nothing to do with physical parameters such as flow velocity distribution, fluid pressure, temperature, density, and viscosity.
High measurement accuracy and large measurement range (up to 200:1).
The straight pipe section has relatively low requirements and is easy to meet.
There are products with large diameter and meeting protection requirements.
The price of large-caliber products is higher, and the larger the caliber, the faster the price increase.
Ultrasonic flowmeters are made by using the original that the propagation speed of sound waves in a static fluid is different from the propagation speed in a flowing fluid. It can measure both conductive media and non-conductive media.
The main features of ultrasonic flowmeter are as follows:
The probe can be installed on the outside of the pipeline (outer clamp type). It does not hinder the flow of fluid in the pipeline to reduce pressure loss.
The measurement accuracy is related to the diameter of the pipe. The larger the pipe diameter, the higher the accuracy possible (multiple sound segments are used).
In occasions where the measurement accuracy is not high, insertion flowmeters can be used to measure large flows. Because the main advantage of the plug-in flowmeter is low price (only a fraction of other structures). And this kind of flowmeter is light in weight, small in pressure loss, and easy to install and maintain.
In occasions where the measurement accuracy is not high, insertion flowmeters can be used to measure large flows. Because the main advantage of the plug-in flowmeter is low price (only a fraction of other structures). And this kind of flowmeter is light in weight, small in pressure loss, and easy to install and maintain.
Common ones include insertion vortex flowmeter, insertion turbine flowmeter, insertion ultrasonic flowmeter, and insertion electromagnetic flowmeter.
The standard orifice flowmeter is a widely used flowmeter. The advantage of the standard orifice flowmeter is that it is simple to manufacture and can be used directly without real flow calibration.
One sensor measures the fluid temperature. The other sensor is a heating element to maintain a constant temperature difference higher than the fluid temperature. That is, the gas flow The heat is taken away when passing the heating element.
The heat taken away is proportional to the flow rate of the gas and the density of the gas. In order to maintain a fixed temperature difference between the two temperature sensors, the circuit needs to provide more power to the heating element. The output power in the circuit is related to the quality of the fluid, and thus the flow rate is measured.
The insertion vortex flowmeter is mainly used for the flow measurement of industrial pipeline medium fluid. Such as gas, liquid, vapor, and other media. The plug-in vortex flowmeter adopts a piezoelectric stress sensor with high reliability. It can work in the working temperature range of -20℃～+350℃. There are analog standard signals and digital pulse signal output.
One of the standard throttling parts of the standard venturi piping system. It is equipped with a differential pressure instrument to measure the volume flow of a single-phase stable fluid (liquid, gas, or vapor) in a closed pipeline.
Because of its simple structure and reliable work, it has been widely used in chemical, petroleum, light industry, medicine, fertilizer, metallurgical, and other industrial sectors.
In simple terms, there are two ways to measure the flow of pipelines. Change the pipeline or leave the pipeline unchanged.
(1) Cut off the pipeline first. Then install a flow meter. Calculate the flow rate in a certain period of time through the cross-section and the flow velocity. (2) Use non-contact sensors. Mount the sensor outside the clamp. Then measure the pipe flow.
A flow meter (or flow sensor) is an instrument used to measure the linear, nonlinear, mass, or volumetric flow rate of a liquid or a gas. When choosing flow meters, one should consider such intangible factors as familiarity of plant personnel, their experience with calibration and maintenance, spare parts availability, and mean time between failure history, etc., at the particular plant site. It is also recommended that the cost of the installation be computed only after taking these steps.
Flowmeter location: Flow meters are installed between the master valve and zone valves. To avoid false alerts, there should be no water taps or other uncontrolled water use on the downstream side of the flow meter.
Sino-Inst offers over 50 Pipe Flow Meters, at the Best Price.
A wide variety of Pipe Flow Meters options are available to you, such as free samples, paid samples.
About 13% of these are magnetic flow meters, 14% are Insertion Magnetic Flow Meter, 25% are Venturi flow meters, 13% are Handheld ultrasonic flow meters, and others are Liquid Turbine Flow Meters.
Sino-Inst is Pipe Flow Meters supplier, located in China. Sewage Flow Meters products are most popular in North America, Mid East, and Eastern Europe. The United States, and India, which export 99%, 1%, and 1% of Pipe Flow Meter respectively.
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.
Battery Operated Flow Meter is mainly suitable for occasions where there is no external power supply, but self-powered.
Battery Operated Flow Meter is a lithium battery powered electromagnetic flow meter developed on the basis of electromagnetic flow meter. The battery-powered electromagnetic flowmeter uses a specially designed sensor excitation system and a high-performance lithium battery power supply system. Designed specifically for the water industry. Satisfy urban water supply to ensure accurate water fee calculation. It is widely used in the workplace without power supply. Such as: urban water supply, heating, sewage treatment, water administration and water resources, water conservancy projects and other industries.
Sino-Inst offers a variety of Magnetic Flow Meters for flow measurement. If you have any questions, please contact our sales engineers.
Self-diagnosis fault alarm and GSM/GPRS data wireless remote transmission function
Through the GSM/GPRS remote management software system, functions such as wireless remote transmission, storage and data analysis of flow data can be realized.
The meter adopts piecewise linear correction, so that it can ensure the accuracy requirements in the large, medium and small flow measurement.
Specifications of Magnetic Battery Operated Flow Meter
There is a component in the structure of electromagnetic flowmeter called “electrode”. Where is the function of this electrode?
Let’s start with its principle. The measurement principle of electromagnetic flowmeter is based on Faraday’s law of electromagnetic induction.
When a medium with a certain conductivity flows through the measuring tube, it will cut the magnetic line of force to generate a certain electromotive force. The electromotive force is detected by the electrode and transmitted to the converter through the cable. After the converter processes the electromotive force, the flow rate of the medium can be displayed. .
The role of the electrode is to detect the magnitude of the electromotive force.
The magnitude of the electromotive force is proportional to the magnetic flux intensity. The inner diameter of the measuring tube is proportional to the average flow velocity. The volume flow of the medium is linearly related to the induced electromotive force and the inner diameter of the measuring tube. It is inversely proportional to the magnetic induction intensity of the magnetic field and has nothing to do with other physical parameters.
The electrode is in direct contact with the measured medium. Therefore, the selection of electrode material is very important. Commonly used electrode materials are 316L stainless steel, Hastelloy, titanium, tantalum, platinum, etc. The material of the electrode can be selected according to the characteristics of the medium.
According to the situation of the wastewater treatment site, there are two general wastewater discharge methods. One is to discharge through pipes, and the other is to discharge through ditches. The two types of flow meters selected are therefore different.
1.Waste water is used for pipeline discharge, and most of them choose electromagnetic flowmeter to measure. Because there are no obstructions in the sensor, there is no fear of debris in the medium.
But need to pay attention to the medium must be full. If the pipe is not full, a pipe must be used to lead a section of the sinking pipe to ensure that the flowmeter is in a full pipe.
Note that the electromagnetic flowmeter cannot be installed at the drain of the pipeline, and the length of the straight pipe must meet the requirements of the flowmeter.
A measuring groove is installed at the discharge port, and an ultrasonic probe is installed directly above the groove. In this way, the flow of wastewater flowing through can be measured. This instrument generally uses 24V power supply, output: 4-20MA.
When selecting the electromagnetic flowmeter for waste water, it is necessary to know the temperature of the medium, the pressure of the medium, the flow range of the medium, the composition of the medium, the power supply requirements, and the on-site installation requirements. The key point of the selection is to choose which product to measure well. The second is to consider the convenience of installation, operation and maintenance. Finally, the product price can be considered.
Why is the price of some lithium battery electromagnetic flowmeters at USD 0. Some prices are higher.
Some manufacturers quote real prices, and some quote false prices. So many people will ask how much is a lithium battery electromagnetic flowmeter?
Electromagnetic flowmeters have different prices due to different diameters, different materials, different media, different linings, different meter heads, and different functions. The final quotation is based on the parameters.
Remarks: Because the lithium battery electromagnetic flowmeter is battery-powered, the price is different than other ordinary electromagnetic flowmeters. The final price should be based on the parameters.
The flowmeter is for measurement, mainly for measuring flow. Accuracy is the main parameter of the flowmeter.
The flow sensor is a signal output. Electrical signal, pulse signal, which is usually called analog output. It is for flow control.
Portable flow meters can also be called portable ultrasonic flow meters.
Generally, due to the requirements of some industrial sites, the on-site environment cannot be satisfied for the pipeline installation method, which is not only troublesome to install, but also has many after-sales problems. Therefore, in many occasions, customers will choose portable ultrasonic flowmeters. Its convenient installation has won a lot of favored by customers.
Portable ultrasonic flowmeters are relatively powerful. For example, some have functions such as data storage, direct printing, and online analysis of data. The handheld ultrasonic flowmeter generally only meets the flow measurement function. If additional data processing is required, it can be processed in the form of data line transmission.
The flow coefficient of the turbine flowmeter is the flow rate that represents the on-site working conditions. The flow coefficient is usually precisely related to the measurement accuracy of the instrument. This is also a very important item. The measurement accuracy level of the turbine flowmeter can be ±1% and ±0.5%.
Ordinary water meters do not need to install batteries. Those with display screens need to install batteries. Those who do not need manual meter reading may also need batteries.
If the water meter is an ordinary water meter, that is, a rotor-type water meter, there is no need to install batteries. This water meter is mainly composed of a casing, an impeller measuring mechanism, a deceleration mechanism, and an indicator meter. It has the characteristics of simple structure.
If the water meter is an IC card prepaid water meter, a battery needs to be installed. Since its data transmission and transaction settlement are carried out through the IC card, it is possible to realize the change from the staff’s door-to-door meter reading to the user’s own payment at the business office. IC card transactions The system also has the characteristics of convenient transaction and accurate calculation. It can use the bank for settlement.
Sino-Inst offer over 20 Magnetic Battery Operated Flow Meter, with Best Price. A wide variety of Magnetic Battery Operated Flow Meters options are available to you, such as free samples, paid samples.
Sino-Inst can customize the nominal diameter of DN3-DN3000. And Sino-Inst can be customized: waterproof electromagnetic flowmeter, battery-powered electromagnetic flowmeter, solar-powered electromagnetic flowmeter, thermal electromagnetic flowmeter, integrated split electromagnetic conversion, etc.
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.
Stainless steel flow meter with stainless steel housing and stainless steel flange connection. Stainless steel flow meter can be used in harsh environment for corrosive fluids flow measurement.
Stainless steel flow meter is an electromagnetic flow meter made of stainless steel. It works based on Faraday’s law of electromagnetic induction. Used to measure the volume flow of conductive liquids with conductivity greater than 5μS/cm. Stainless steel flow meter is an induction meter that measures the volume flow of conductive media. It can measure the volume flow of general conductive liquids. It can also be used to measure the volume flow of strong corrosive liquids such as strong acids and alkalis and even liquid-solid two-phase suspension liquids such as mud, mineral pulp, and paper pulp.
Sino-Inst offers a variety of Magnetic Flow Meters for flow measurement. If you have any questions, please contact our sales engineers.
Flow measurement is not affected by changes in flow density, viscosity, temperature, pressure and conductivity. The sensor induced voltage signal has a linear relationship with the average flow rate. Therefore, the measurement accuracy is high
There is no obstruction in the measuring pipe, so there is no additional pressure loss. There are no movable parts in the measuring pipeline. So the sensor has a long life
The straight pipe section required by the sensor is short, which is convenient for installation
Only the inner lining and electrode of the sensor are in contact with the liquid to be measured. As long as the electrode and lining material are selected reasonably. Resistant to corrosion and wear
Two-way measurement system. The forward and reverse flow can be measured.
Applicable medium: any conductive liquid.
Specifications of Magnetic Stainless Steel Flow Meter
Converter form
Compact type
Split type
Executive standard
JB/T9248-1999
JB/T9248-1999
Accuracy class
Level 1 or 0.5
Level 1 or 0.5
Dielectric conductivity
＞5μs/cm
＞5μs/cm
Can measure the lowest flow rate
0.1 m/s
0.1 m/s
Can measure the highest flow rate
15m/s
15m/s
Turndown ratio
1:20, can be customized
1:20, can be customized
monitor
Standard
Standard
Signal output
Pulse or 4-20mA
Pulse or 4-20mA
Lining material
Rubber, PTFE
Rubber, PTFE
Electrode material lining
316 stainless steel, tantalum, titanium
316 stainless steel, tantalum, titanium
Power supply
220VAC or +24VDC
220VAC or +24VDC
Communication Interface
RS232, RS485
RS232, RS485
Protocol
MODBUS, HART, Profibus, etc.
MODBUS, HART, Profibus, etc.
Explosion-proof grade
Exd[ia]qIICT5
Exd[ia]qIICT5
Protection level
IP65, optional IP68
IP65, optional IP68
Instrument pass
DN6~DN2000
DN6~DN2000
Installation method
Flange installation, optional flange clamping
Flange installation, optional flange clamping
Nominal pressure
1.6MPa or customized
1.6MPa or customized
Medium temperature
＜180℃
＜180℃
Ambient temperature
-30℃-60℃
-30℃-60℃
Flow Meter for Measuring Corrosive Liquids
Stainless Steel Flow Meter is a kind of electromagnetic flow meter. It can be used to measure the flow of strong corrosive liquids such as acid, alkali and salt solution.
In the process of industrial consumption, many media are slightly or extremely corrosive. However, due to consumer demand, we also need to measure these media.
How to choose a suitable flow meter? How to choose a flow meter for measuring corrosive media?
1.Corrosion
Corrosion is a phenomenon in which metals are destroyed due to chemical effects in their environment. All metals and alloys can be corrosion resistant in certain specific environments.
But in other environments it is very sensitive to corrosion. Generally speaking, there are no industrial metal materials that are resistant to corrosion in all environments.
Corrosion can be divided into uniform corrosion (uniform corrosion) or general corrosion (general corrosion) and partial corrosion (localized corrosion).
The corrosion rate of general corrosion can be expressed in units such as mm/a. Usually, the data whose corrosion rate is below 0.1mm/a is converted to corrosion-resistant data. The corrosion rate is one order of magnitude larger than this, that is, the corrosion rate is 1mm/a.
Information about common equipment can sometimes be determined as applicable. Regarding the measuring element of the flow meter, it is not allowed. Based on the corrosion rate, the service life of the metal can be predicted.
2.Damage to the flowmeter caused by corrosive media
The corrosiveness of the medium is a serious threat to the flowmeter. Only certain types of flow meters such as clamp-on ultrasonic flow meters are less affected by corrosion.
a. Corrosive media will corrode the parts that are in direct contact with the flowmeter. Make it damaged and lose its function. For example, corrosion damage to the diaphragm of the differential pressure transmitter, and complete failure due to leakage of silicone oil. The electrode is corroded, causing the medium to be out of the world, causing the excitation coil to burn out.
b. The parts of the flowmeter are corroded by corrosive media for a long time and the geometric dimensions are changed. Cause the accuracy of the instrument to decrease. For example, after the rotor in the rotameter is corroded by the fluid, the outer dimension is reduced.
As a result, the flow indication is low. Another example is that the vortex generator in the vortex flowmeter is corroded by the fluid and the width is reduced. The appearance of the front flow surface becomes rough, causing changes in the flow coefficient.
There are also clamp-on ultrasonic flowmeters that are less affected by corrosive media. It is also often caused by the corrosion of he metal pipe by the medium. It weakens the transmitting and receiving signals, and loses flexibility in severe cases.
c. Shorten the life of the instrument. For example, the conical tube and other parts in the metal tube float flowmeter. After several years, the welds were worn out.
d. Leakage of corrosive media. If it is not discovered and disposed of in time, it will easily lead to safety and personal accidents.
According to long-term inspection, electromagnetic flowmeter and ultrasonic flowmeter are selected for common corrosive liquid measurement. If it is corrosive gas, you can choose acid-resistant stainless steel vortex flowmeter or other gas flowmeter.
The electromagnetic flowmeter for measuring liquid media can measure various corrosive media containing tiny particles. Of course, the premise is that the measured medium is conductive. It is only necessary to use different lining materials and electrode materials according to the corrosiveness of the medium to deal with the corrosion problem of the medium belt.
Ultrasound is even simpler. If you choose a clamp-on ultrasonic flowmeter, you don’t have to think about the corrosiveness of the medium at all. It’s just not as high as an electromagnetic flowmeter in measurement accuracy.
3.Measures for fluid corrosion in flow measurement
(1) Change the instrument regularly
Corrosive media can corrode metals in various conditions. Some corrosion rate is very fast, that is, full corrosion. Some corrosion is subtle, very slow, that is, partial corrosion. When making instrument selection, it should be analyzed in detail according to the detailed situation. Then make a decision.
For example, compressed air and water are generally considered to be non-corrosive, but they are not. Because the concentration of nitrogen and oxygen compounds in the atmosphere in urban areas is generally higher. When it is absorbed by the condensate in the compressed air. The condensate is acidic. Thereby it has slight corrosion to carbon steel materials.
This situation is more serious in plant areas such as sulfuric acid plants, nitric acid plants, and chlor-alkali plants. Of course, in addition to dilute nitric acid, sulfuric acid and hydrochloric acid may be contained in the compressed air at this time. The water situation is similar. Especially river water. Because it contains a variety of ions, it also corrodes carbon steel. Instruments used under this condition will show signs of corrosion after several years.
For example, it was found that the surface of the carbon steel ring chamber in contact with the fluid in the flow throttling installation was corroded. Become bumpy. In severe cases, the geometric size and appearance will change greatly. The inner walls of the front and rear straight pipe sections also become uneven. This situation does not meet the requirements of the verification procedures. It is difficult to guarantee the accuracy of the original instrument.
At this time, a problem arises. Is it possible to design and select the annular chamber and the front and rear straight pipe sections in the throttling installation to be changed to stainless steel?
Of course, if it is changed to stainless steel. The corrosion problem of the annular chamber and straight pipe section will certainly be solved, but at the same time the investment has increased. And the increase in investment is related to the pipe diameter. If the nominal diameter is larger. The increase in technology capital is not a small number.
Therefore, the decision-making should be based on the measurement accuracy request of the detailed measurement point, the severity level of corrosion, the life expectancy, and the budget acceptance ability. Weigh the pros and cons, and control responsively.
If the measurement accuracy is not high. Such as for process monitoring and control. Slightly corroded, carbon steel materials can also be used for many years. After the change to stainless steel, the investment increased more. Then, it’s better to wait for the ring chamber to be corroded and unable to continue to be used. Then update the entire or damaged part of the throttling installation.
(2) Avoid the heavy
Avoiding the heavy and the light is based on a deep understanding of the process flow and the characteristics of the relevant media. Choose a measurement plan reasonably. It can also achieve the purpose of metering or stopping control of the consumption process. Avoid highly corrosive parts. And choose the less corrosive part. Even change the variety of adjusted parameters.
For example, the flow rate constant value adjustment system can be replaced by liquid level average adjustment or other suitable variable adjustment. So as to avoid the problem of corrosion resistance of flow measuring instruments.
For example, the flow of sewage into sewage treatment plants must be measured. In order to control the total discharge of pollutants. The sewage is generally acidic or alkaline. And correspondingly, an appropriate amount of alkali or acid should be added to neutralize it. Then, consider the corrosion of sewage to the flow meter. Of course, it is better to select the flow detection point after neutralization.
The flow measurement of raw gas also has a similar situation. Raw gas often contains a certain amount of sulfur dioxide. This gas is not very corrosive in boring hours. But after the wild gas is separated from the furnace. With the increase of the transfer interval. The gas temperature gradually decreases. The temperature rises accordingly. And it quickly shows condensate and is highly corrosive. When considering the location of the gas flow measuring instrument device. Of course, it should be selected before the gas presents condensate.
(3) Choose an instrument with corrosion resistance
①The instrument selection of common acid medium.
In the vortex flow sensor and turbine flow sensor, the part in contact with the fluid is acid-resistant steel. Ordinary acidic liquids and gases can be used. The oval gear flowmeter made of acid-resistant steel can meet the needs of accurate measurement of ordinary acid liquids.
②The instrument selection of conductive liquid.
There are many kinds of lining materials for measuring tube of electromagnetic flowmeter.
Among them, the good corrosion resistance is polytetrafluoroethylene. There are also several kinds of electrode materials, which can meet the needs of most corrosive media.
When selecting electrode materials, the requirements should be met. Don’t be superstitious about precious metals. Because precious metals are not omnipotent.
Other catalysts like platinum electrodes have also attracted people’s attention. In chemical consumption, platinum is a very good catalyst. Certain media react chemically after contact with platinum under certain conditions. Proven hydrogen peroxide. The platinum electrode electromagnetic flowmeter is measuring hydrogen peroxide. Aerosol will be generated on the surface of the electrode. When the flow is zero. The output will also fluctuate.
Select appropriate electrode materials and lining materials to measure the flow of corrosive media. If the fluid temperature is also within the allowable range. That is the ideal choice, its measurement accuracy can reach 0.3~1%R.
Magnetic flowmeter can meet the needs of various measurement ranges. But if the fluid does not conduct electricity, the electromagnetic flowmeter is powerless.
③The instrument selection of non-conductive liquid.
When the clamp-on ultrasonic flowmeter works, the fluid does not directly contact the meter. Therefore, it is suitable for various corrosive fluids.
There are two types of clamp-on ultrasonic flowmeters according to their principles. Jet lag and Doppler.
The time difference method is suitable for clean single-phase fluids. The accuracy is related to pipe diameter and flow rate. E.g: a. When pipe diameter>150mm, v>0.3m/s, the uncertainty is ±2%R (it can reach ±1% R after calibration). v ≤0.3m/s, the uncertainty is ±O.Olm/s. b. When the pipe diameter is ≤150mm, v>0.3m/s, the uncertainty is ±5%. v≤0.3m/s, the uncertainty is ±0.05m/s.
The Doppler flowmeter is suitable for liquids with high solid content or bubbles. The uncertainty can only reach ±1%~±10%. Obviously much lower than the electromagnetic flowmeter. Therefore, use it only when there is no other better method. The price has nothing to do with the pipe diameter. When DN≤200, ultrasonic meters are more expensive than electromagnetic flowmeters. When DN≥250, the ultrasonic flowmeter is cheaper than the electromagnetic flowmeter.
④ Selection of corrosive gas instruments
a. Ultrasonic flow meter.
In recent years, the domestic and foreign natural gas industry has achieved rapid development. This has greatly promoted the development of natural gas metering instruments. Among them, the multi-channel ultrasonic flowmeter specially developed for natural gas measurement is a dazzling pearl. If this technology is transplanted for corrosive gas flow measurement, it should be feasible. Because only the inner wall of the measuring tube needs to be treated for corrosion prevention.
b. Throttle differential pressure flowmeter.
There are no reports of commercial throttling differential pressure flow meters suitable for corrosive media. However, such meters developed by users themselves were reported decades ago.
Sino-Inst offers over 10 Magnetic Stainless Steel Flow Meter for flow measurement. About 50% of these are wastewater flow meters, 40% is the liquid flow sensor. And 20% are Ultrasonic Flow Transmitter and mass flow meter.
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.
Sanitary Flow Meter adopts stainless steel tri clamp fittings. Used in food, sport drink, liquor and other beverage industries preprocess applications.
Sanitary Flow Meter uses a new type of sanitary lining material and lining technology, which meets the sanitary requirements of the food industry. It uses a stainless steel shell and stainless steel clamp connection. It is convenient for the quick disassembly and cleaning of the electromagnetic flow meter. Magnetic flow meter in a sanitary version which meets the strict requirements of the food-processing and bio-technology/ pharmaceutical industries.
Sino-Inst offers a variety of Magnetic Flow Meters for flow measurement. If you have any questions, please contact our sales engineers.
The sensor adopts new sanitary lining material. Prevent the accumulation of measuring medium residues in the measuring tube.
The sensor adopts a quick connection scheme. The electromagnetic flowmeter is easy to disassemble, maintain and clean.
The converter uses a 16-bit embedded microprocessor for signal processing. It has high integration and fast calculation speed. The calculation accuracy is high. Fully digital signal processing. Strong anti-interference ability. Features such as reliable measurement.
The intelligent converter can simultaneously display measurement data such as volume flow percentage, instantaneous flow, and cumulative flow.
The flowmeter is a two-way measuring system with three totalizers inside. Forward total, reverse total, and difference total. It can display positive and negative flow.
With digital communication signal output such as current, pulse, RS485, RS232, Hart and Modbus.
Application of Hygienic Electromagnetic Flowmeter in Beer Industry
Magnetic Sanitary Flow Meter uses a new sanitary lining material and lining process. Meet the hygiene requirements of the food industry. At the same time, a stainless steel casing and a stainless steel clamp connection are used to facilitate the rapid disassembly and cleaning of the electromagnetic flowmeter.
The electromagnetic flowmeter is not easily contaminated during use. It can be widely used in the production process of mineral water, soy sauce, jam, fruit juice, rice wine, milk, and other foods, as well as in the fields of hygiene and chemical industry. Especially it is most widely used in beer filling.
Magnetic Sanitary Flow Meter is used in the beer filling production line to perform quantitative filling while filling. An electronic valve filling machine equipped with a sanitary electromagnetic induction flowmeter is adopted, which is a dynamic measurement and quantitative form. The electromagnetic flowmeter is used for dynamic measurement of the liquid flowing through the valve.
A Sanitary electromagnetic flowmeter plays an important role in the measurement process of beer brewing. Not only because it has the advantages of low failure rate and high measurement accuracy. Also due to its Faraday electromagnetic induction principle. That is, the conductor will generate induced electromotive force when passing through the magnetic field. The flowing liquid medium represents a moving conductor, and the induced current is proportional to the flow speed. Input the metering amplifier through a pair of electrodes. Through the calculation of the fluid cross-sectional area and flow rate. The flow rate can be accurately obtained, and the quantitative accuracy can reach 1/1000.
Note: The caliber of the selected sanitary electromagnetic flowmeter is not necessarily the same as the pipe diameter, it should be determined by the flow rate. The process industry transports liquids with different viscosities such as water. The pipeline velocity is generally 1.5～3m/s. EMF is used on such pipelines, and the sensor diameter is the same as the pipe diameter.
Application of Magnetic Sanitary Flow Meter in measuring beverages such as milk and juice
Milk is a liquid food, similar to this, there are juices, beverages, etc. For the measurement of such media, the level of hygienic requirements is of course the first.
In our sales process, we often encounter some telephone consultations Choose the flowmeter in the milk pipeline configuration. The related flowmeter products produced by our company can also meet its measurement requirements.
The following is a corresponding explanation of the selection of measuring instruments for such food liquid media.
Question: Should I choose a sanitary liquid turbine flowmeter or a sanitary electromagnetic flowmeter? Or is there a more advanced, better and more suitable flow meter?
Answer: First of all, milk (liquid) conducts electricity (there are various conductive ions in it). There are many kinds of mineral ions in milk, so both flow meters can be used.
Advantages: (1) High precision, among all flow meters, it is the most accurate flow meter; (2) Good repeatability; (3) Zero drift, good anti-interference ability; (4) Wide range; (5) Compact structure. Disadvantages: (1) The calibration characteristics cannot be maintained for a long time; (2) Fluid physical properties have a greater impact on flow characteristics.
Tri-Clamp sanitary magnetic flowmeter
Advantages: (1) The measurement channel is a smooth straight pipe, which will not be blocked. It is suitable for measuring liquid-solid two-phase fluids containing solid particles, such as pulp, mud, sewage, etc.; (2) No pressure loss caused by flow detection, and good energy saving effect; (3) The measured volume flow is actually not significantly affected by changes in fluid density, viscosity, temperature, pressure and conductivity; (4) Large flow range and wide caliber range; (5) Corrosive fluids can be used. Disadvantages: (1) Liquids with very low conductivity cannot be measured, such as petroleum products; (2) Cannot measure gas, steam and liquid with larger bubbles;
Large-caliber instruments are mostly used in water supply and drainage projects.
Small and medium calibers are often used in high-demand or difficult-to-test occasions, such as the cooling water control of the blast furnace tuyere in the iron and steel industry, the measurement of pulp and black liquor in the paper industry, the strong corrosive liquid in the chemical industry, and the ore pulp in the non-ferrous metallurgical industry.
Small calibers and tiny calibers are often used in places with hygiene requirements such as the pharmaceutical industry, food industry, and biochemistry.
Summary:
The flowmeter in the milk pipeline configuration can be selected according to the on-site working conditions and flow range. No flowmeter is the best, only choose the appropriate flowmeter according to the actual situation on the spot. It is handy during use. It is a perfect flow meter.
Sanitary Flow Meter, also called sanitary turbine flow meter or Hygienic turbine flowmeter.
The Sino-Instrument sanitary turbine flow meter, food grade flow meter, provides accuracy, versatility, and economy, in measuring a wide variety of food, beverage and pharmaceutical products.
The Sino-Inst sanitary turbine and is suitable, for use in clean-out-of-place (COP) and sterilize-out-of-place (SOP) environments.
Sino-Inst is Sanitary Flow Meters supplier, located in China. Sanitary Flow Meters products are most popular in North America, Mid East, and Eastern Europe. The United States, and India, which export 99%, 1%, and 1% of ultrasonic level transmitters respectively.
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.
Magnetic Flow Meter is a flow meter that measures the flow of conductive fluids. Abbreviated as EMF, also called Electromagnetic flowmeters. It is a kind of Volumetric flow meter. A magnetic flow meter measures the velocity of conductive liquids moving through a pipe or conduit. In the wastewater treatment industry, Magnetic Flow Meter is the best flow meter choice.
Measurement is not affected by the variation of flow density, viscosity, temperature, pressure and conductivity. High accuracy measurement is guaranteed according to the linear measurement principle.
No obstacle in the pipe, no pressure-loss and lower requirement for straight pipeline. DN 6 to DN2000 covers a wide range of pipe size. A variety of liners and electrodes are available to satisfy different flow characteristic.
Programmable low frequency square wave field excitation. Improving measurement stability and reducing power consumption.
Implementing 16 bits MCU, providing high integration and accuracy.
Full-digital processing, high noise resistance and reliable measurement. Flow measurement range up to 1500:1.
High definition LCD display with backlight.
RS485 or RS232 interface supports digital communication.Intelligent empty pipe detection and electrodes resistance measurement diagnosing empty pipe and electrodes contamination accurately.
SMD component and surface mount technology (SMT) are implemented to improve the reliability.
Magnetic flow meter working principle
Magnetic flow meters use the principle of Faraday’s Law of Electromagnetic Induction to measure the flow rate of liquid in a pipe. In the magnetic flowmeter pipe parts, a magnetic field is generated, and channeled into the liquid flowing through the pipe.
Faraday’s Law states that the voltage generated is proportional to the movement of the flowing liquid. A conductor moving through a magnetic field produces an electric signal within the conductor. And the singal is proportional to the velocity of the water moving through the field.
As fluid flows through the magnetic field, conductive particles in the fluid create changes. This variation is used to measure and calculate the velocity of water flow through the pipe. When the fluid moves faster, more voltage is generated. The electronic transmitter processes the voltage signal to determine liquid flow.
Magnetic flow meter principle – Faraday’s Formula
Faraday’s Formula E is proportional to V x B x D where:
E = The voltage generated in a conductor V = The velocity of the conductor B = The magnetic field strength D = The length of the conductor
To apply this principle to flow measurement with a magnetic flow meter. First is to state that the fluid being measured must be electrically conductive for the Faraday principle to apply.
As applied to the design of magnetic flow meters, Faraday’s Law indicates that:the signal voltage (E) is dependent on V, B, D.V is the average liquid velocity ;
B is the magnetic field strength ;
D is the length of the conductor ( which in this instance is the distance between the electrodes).
Can not be used to measure gas, steam and liquids containing a lot of gas;
Cannot be used to measure liquid media with very low conductivity.
Cannot be used to measure high temperature media. At present, it is restricted by the lining material and electrical insulation material of the measuring tube of the electromagnetic flowmeter for general industry;
The electromagnetic flowmeter is easily affected by external electromagnetic interference.
Magnetic flow meter diagram
Dimensions of Converter, shown as Fig 3.
Dimensions of Sensor, shown as Fig 4.
Remark:
1. Nominal Pressure 4.0 MPa for DN10-150; Nominal Pressure 1.6 MPa for DN10-1000; Nominal Pressure 1.0 MPa for DN10-1600; Nominal Pressure 0.6 MPa for DN10-2000. Other special pressure level can be designed on demand.
2. The length L increases 6 mm if ground flange is equipped; The length L increases 6 mm if inlet protection flange is equipped; The length L increases 6 mm if liner protection flange is equipped.
Magnetic flow meter accuracy
The accuracy of the electromagnetic flowmeter supplied by Sino-Inst is 0.5%, 0.2% optional.
How to understand the accuracy of electromagnetic flowmeter?
The absolute value of the difference between the measured value and the true value is compared with the true value, and the number in front of the obtained percentage is the accuracy. If the number is less than 0.5 and greater than 0.2, the general accuracy is called 0.5 level.
For example: the measured value is 100.5 or 99.5, the true value is 100, and the obtained percentage is 0.5%, which means that the accuracy is 0.5. But if the number in front of the percentage is less than or equal to 0.2, it is called 0.2 level accuracy.
Such as:
Rosemount magnetic flow meter’s Accuracy: Up to 0.15% of volumetric flow rate accuracy over 13:1 flow turndowns, 0.25% over 40:1 flow turndown
Yokogawa magnetic flow meter Accuracy: ±0.35% of flow rate
Electromagnetic flowmeters have been used for more than 50 years and have been widely used worldwide. The fields involve water/sewage, chemical, pharmaceutical, paper, food and other industries.
Large-caliber meters are mostly used in water supply and drainage projects.
Small and medium calibers are often used in places where solid and liquid are both equal and difficult to detect fluids or high requirements.
Small calibers and tiny calibers are often used in places with hygiene requirements such as the pharmaceutical industry, food industry, and biological engineering.
Every measurement process is unique. Any instrument may have problems during use.
In the process of using the electromagnetic flowmeter, if there is a measurement problem. Please check whether the following problems occur first, and try the corresponding solutions.
If the problem is not listed below, please contact Sino-Inst staff in time. We will provide you with suggestions for problem solving.
Phenomenon
Solution
No display
a) Check the connection of power supply; b) Check fuse; c) Check the voltage of power supply; d) Check if the LCD contrast can be adjusted. Adjust it if possible; e) Return to base, if a) to d) are OK.
Coil Alarm
a) Check if terminal EXT+ and EXT- are open; b) Check if coil resistance is less than 150Q; c) Replace converter if a) and b) are OK.
Empty Pipe Alarm and Electrodes Alarm
a) Check if the sensor pipe is filled with fluid; b) Check the connection of signal wiring; c) Connect the terminal SIG1, SIG2 and SIG GND. If the alarm display disappears, it is confirmed the converter is normal. The alarm may be caused by the bubble in the fluid; d) For electrodes alarm, measure the resistance between two electrodes with a multimeter. The read should be between 3 to 50k. Otherwise, the electrodes are contaminated or covered.
High Alarm
Increase the flow range.
Low Alarm
Reduce the flow range.
Inaccurate Measurement
a ) Check if the sensor pipe is filled with the fluid to be measured . b) Check the wiring; c ) Check if the sensor factor and flow zero are the same as those on the calibration sheet .
Magnetic Flow Meter has different calibers, different materials, different media, different linings, different meter heads, and different functions, so the price is different!
The Magnetic Flow Meter price list is attached below for reference only!
The final quotation is subject to the parameters!
Diameter/DN
Lining rubber (USD)
Lined with PTFE (USD)
Electrode
Power
Material
DN15
485
647
316L (Standard configuration)
24V/220V
Carbon steel
DN20
493
647
316L (Standard configuration)
24V/220V
Carbon steel
DN25
500
647
316L (Standard configuration)
24V/220V
Carbon steel
DN32
537
654
316L (Standard configuration)
24V/220V
Carbon steel
DN40
566
654
316L (Standard configuration)
24V/220V
Carbon steel
DN50
588
662
316L (Standard configuration)
24V/220V
Carbon steel
DN65
618
676
316L (Standard configuration)
24V/220V
Carbon steel
DN80
676
691
316L (Standard configuration)
24V/220V
Carbon steel
DN100
706
750
316L (Standard configuration)
24V/220V
Carbon steel
DN150
728
794
316L (Standard configuration)
24V/220V
Carbon steel
DN200
757
838
316L (Standard configuration)
24V/220V
Carbon steel
DN250
809
985
316L (Standard configuration)
24V/220V
Carbon steel
DN300
926
1118
316L (Standard configuration)
24V/220V
Carbon steel
DN350
985
1368
316L (Standard configuration)
24V/220V
Carbon steel
DN400
1081
1441
316L (Standard configuration)
24V/220V
Carbon steel
DN500
1184
1765
316L (Standard configuration)
24V/220V
Carbon steel
DN600
1368
1904
316L (Standard configuration)
24V/220V
Carbon steel
DN700
1640
3574
316L (Standard configuration)
24V/220V
Carbon steel
DN800
2556
3868
316L (Standard configuration)
24V/220V
Carbon steel
DN900
3088
4574
316L (Standard configuration)
24V/220V
Carbon steel
DN1000
4044
5926
316L (Standard configuration)
24V/220V
Carbon steel
Note: Electromagnetic flowmeters are different in price due to different calibers, different materials, different media, and different functions!
Factors affecting the price of Magnetic Flow Meters
The larger the diameter of the flowmeter, the higher the price. For example, DN250 electromagnetic flowmeter is more expensive than DN25 electromagnetic flowmeter. On the contrary, the smaller the diameter, the lower the price.
The flowmeter is divided into: integrated type and split type. Split type electromagnetic flowmeter is more expensive than integrated type electromagnetic flowmeter. The high reason is that the expensive money for the split type is shielded wire money.
The flowmeter is divided into: ordinary type, anti-corrosion type, anti-corrosion type. The price of electromagnetic flowmeter is higher than that of ordinary electromagnetic flowmeter. The reason for the higher price is that the lining is distinguished. The anti-corrosion type is tetrafluoroethylene lining, mainly for measuring acid Alkaline medium. The common type is rubber lining, mainly for measuring sewage and ordinary water medium.
According to the standard of output signal connection and excitation (or power supply) connection, there are four-wire system and two-wire system;
According to the assembly method of converter and sensor, there are split type and integrated type;
According to the connection method of the flow sensor and the pipeline, there are flange type, clamping type, sanitary type, and insert type;
According to whether the electrode of the flow sensor is in contact with the measured liquid, there are contact type and non-contact type;
According to the structure of the flow sensor, there are short tube type and plug-in type (plug-in electromagnetic flowmeter);
Classified by purpose, there are general type, explosion-proof type, sanitary type, anti-intrusion type and diving type (open channel flowmeter) for open channel flow measurement.
Magnetic flowmeters are used in water treatment plants to measure treated and untreated sewage, process water, water, and chemicals.
Water and wastewater applications include the custody and transfer of liquids in the main pipe between water/wastewater areas.
Applications in the mining and mineral processing industries include process water and process slurry streams and heavy media streams.
In order of usage, water/wastewater industry, chemical, food and beverage, oil and gas (although not for oil and gas fluids but in support of the processes), power, pulp and paper, metals and mining, and pharmaceutical.
When choosing a suitable electromagnetic flowmeter, Sino-Inst recommends that you consider the following parameters in turn:
The measured medium must be a conductive liquid. The pipe should be filled. There must be no air bubbles.
During installation, the flow direction of the measured medium is consistent with the flow direction indicated by the flow meter;
The straight pipe section of 5DN in front and 3DN in back must be guaranteed (DN is the diameter.). If there are mainstreams such as valves, elbows, and reducing heads in the front section, it is recommended that “before 10DN and after 5DN”
The flowmeter should be avoided as much as possible: negative pressure in the measuring tube. Try to avoid large vibrations. Corrosive gas and other places with harsh installation environment around;
The flowmeter should avoid ferromagnetic objects and equipment with strong electromagnetic fields (such as large motors, large transformers, etc.). So as not to affect the working magnetic field and current signal of the sensor;
For the convenience of maintenance, it is recommended to install a bypass pipe at the flowmeter installation location.
When the flowmeter is installed at high altitude or underground, sufficient space for installation, debugging and maintenance should be reserved. In addition, make corresponding measures according to different protection levels;
Should fully understand the corrosiveness of the measured medium and the characteristics of the flowmeter, and strictly prevent the flowmeter from being corroded;
When welding or flame cutting near the sensor, take isolation measures to prevent the lining from heating. And it must be confirmed that the instrument sensor signal line is not connected to prevent damage to the sensor.
Mass flow meters and electromagnetic flow meters are different types of flow meters. The mass flow meter measures the mass of the fluid. The electromagnetic flowmeter is a volume flowmeter, which measures the volume of fluid.
The mass flow meter can measure non-conductive media. And more special media such as high temperature, low temperature and high viscosity. Electromagnetic flowmeters can only measure conductive media, mostly wastewater.
The accuracy of the mass flow meter is higher.
The cost of mass flow meters is several times that of electromagnetic flow meters.
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Sino-Inst offer over 50 Magnetic Flow Meters, with Best Price.
A wide variety of Magnetic Flow Meters options are available to you, such as free samples, paid samples.
Sino-Inst is Magnetic Flow Meters suppliers, located in China. Magnetic Flow Meters products are most popular in North America, Mid East, and Eastern Europe. The United States, and India, which export 99%, 1%, and 1% of Magnetic Flow Meters respectively.
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.
The target flow meter is also known as the drag force flow meter. Insert a target (drag element) into the flow field. Measure the drag force on the inserted target and convert it to the flow velocity.
The target flow meter is also called a drag force flowmeter. The target flow meter inserts a target (drag element) into the flow field. The target usually is a flat disc or a sphere with an extension rod. There will be a differential pressure. And then target flow meters measure the drag force on the inserted target and convert it to the flow rate. Sino-Inst manufactures target flow meters for liquid, gas, and steam measurement.
Sino-Inst, Manufacturer for differential pressure flow meters. Including the Orifice plate, Venturi, Annubar, etc. Suitable for liquid, gas, and steam flow measurement. Please contact our sales engineers for technical support!
Sino-Inst offers a Capacitive target flowmeter. A capacitive target flowmeter is a new type of capacitive force inductive flowmeter. Developed on the basis of traditional target flowmeter. And developed with new sensors and microelectronic technology. It has both orifice plate and vortex flowmeters.
The characteristics of no moving parts. High sensitivity, accuracy comparable to volumetric flow meters, and a wide range. The use of a chip-level capacitive force sensor and an efficient anti-overload structure design are the key cores for the new product to achieve high precision and high stability.
In addition, it has unique anti-interference and anti-impurity performance. Our capacitive target flow meters can replace the conventional flow measurement. It has good adaptability to difficult flow measurement conditions. Such as high viscosity, dirty media, easy to set and block, high temperature, low temperature, and strong corrosion.
It is widely used in petroleum, chemical industry, metallurgy, power. Pharmaceutical, environmental protection, food and other fields.
The target flow meters are applicable to the following ranges:
Diameter ,Φ15~Φ2000mm or bigger.
High and low temperature, -196°C~+450°C.
High pressure : 0~42Mpa.
Suitable for various media: gas, liquid (including high viscosity liquid, slurry), steam;
It is suitable for low-velocity media, and its minimum measurable flow rate is 0.08m / s.
Target Flow Meter Construction
The capacitive target flowmeter is mainly composed of a measuring tube (housing), a new capacitor.
It consists of a force sensor, chokes, integrated display, and output.
Target Flow Meter Construction
Features of Target Flow Meters
The whole instrument has a solid structure without moving parts, easy to disassemble.
Can choose a variety of anti-corrosion. And high and low temperature resistant materials (such as Hastelloy, titanium, etc.);
The whole machine can be made fully sealed without dead corners (welded form). Without any leakage points, and can withstand 42MPa high pressure;
Small pressure loss, only about 1/2 △ P of standard orifice plate;
Strong anti-interference and anti-impurity capabilities;
The instrument has a self-checking program. And the failure phenomenon is clear at a glance;
The sensor is not in contact with the measured medium, there is no component wear, and it is safe and reliable to use;
Dry calibration method can be used in situ, that is, weight hanging method. One-button operation can complete the calibration;
There are multiple installation methods to choose from. Such as online plug-in, low installation costs;
With integrated temperature and pressure compensation, direct output quality or standard square;
Optional small signal removal, non-linear correction, and filtering time can be selected;
It can accurately measure the gas and liquid flow under various normal temperature. High temperature 500 degrees, and low temperature -200 degrees;
Accurate measurement, accuracy can reach 0.2%;
Good repeatability, generally 0.05% to 0.08%, fast measurement;
Can change the range of resistance (target) according to actual needs;
Low-power battery on-site display, can directly read the displayed value online. And the display can read the instantaneous and cumulative flow and percentage bar graph at the same time;
Simple and convenient installation and extremely easy maintenance;
Multiple output formats, which can transmit various parameters remotely;
Strong vibration resistance, pulsating flow can be measured within a certain range.
Target flow meters types
Plug-in target flowmeter
Pipeline (flange) target flowmeter
Wafer type target flowmeter
Clamp type (sanitary) target type flowmeter
Jacketed thermal target flowmeter
Threaded target flowmeter
Technical Data of Target Flow Meter
Item
Target flowmeter Performance, Parameters
Medium
Liquid, Gas, and Steam
Caliber
Pipe type 15~300mm Clamp type 15~600mm Plug type100~2000mm
Pressure
0.6~10MPa 0.6~42MPa 0.6~42MPa
Accuracy
± 0.2 ~ ± 1.5%FS
Medium Temperature
-196° C~+450° C ( Confirming the temperature range before purchase)
Media temperature
-20 ~ +70 (normal temperature type) -196 ~ +700 (high/low temperature type)
Precision
± 0.2% ± 0.5% ± 1.0% ± 1.5% ± 2.5%
Range
1: 3 1: 5 1: 10 1: 10 1: 10(Steam)
Compensation
Temperature compensation; Pressure compensation
Repeatability
0.1%~0.08%
Power Supply
3.6V lithium battery, 24V DC
Output
LCD display, and 4~20mA, 0~10V, impulse or RS485 (Optional)
Material of measure tube
Carbon Steel; 304; 316L; Being able to provide other according to user requests
Explosion- Prevent Symbol
ExiallCT4, ExiallBT4
Protection Rank
IP65; IP67
Features
* Installation is simple and convenient, easy to maintain * A variety of output forms, spread far and wide variety of parameters * Anti-vibration is strong, within a certain range can be measured pulsatile flow * Anti-jamming, anti-contamination ability to exceptionally strong
Advantages of Target flow meters:
They are useful for difficult measurements. Such as slurries, polymer bearing and sediment-bearing materials corrosive mixtures, etc.
They provide good accuracy when calibrated for specific streams.
They are good for relatively high temperatures and pressures.
Low initial set up cost
Can be used with a wide variety of fluids, even viscous fluids and slurries.
Can be used in abrasive, contaminated, or corrosive fluid flow
Can be made to measure flow velocity that is sporadic or multi-directional with sphere drag element designs
Can be used for any type of liquid, gas, or steam cryogenics.
There is no moving parts such as bearings, to wear out causing failures.
High reliability where life tests have been made to 20,000,000 cycles.
Can be used for any line size from 0.5 inches and up with any type of mounting.
Range/fluid changes accomplished by simply changing targets.
Turndowns aprox.15:1
Several materials are available. Among them 303/304 SS, 316 SS, hastelloy and inconel.
Disadvantages of target flow meters:
Calibration must be verified in the field.
Pressure drop is inevitable due to the rod and the drag element
In-line mounting required in these flowmeters.
They have a limited calibration data.
In case of target flowmeters no-flow conditions must exist for zeroing
Be careful when operating target flowmeters low in their flow range. Because accuracy can be compromised at these flow rates.
Avoid abrasive fluids. Because the target can be damaged and measure inaccurately.
Fluids that coat the target can cause it to become heavy. Such that the force measurement can become inaccurate and unresponsive to flow changes.
These flowmeters should not be applied to slurries and high viscosity liquids.
Calibration is an important part of ensuring accurate operation of target flowmeters.
Pressure effects, physical effects, and flowmeter orientation can affect the zero adjustment of target flowmeters.
After calibrating the target flowmeter (typically with weights), be sure to zero target flowmeters after installation with a full pipe under no flow conditions. To ensure compensation for these effects in the final installation.
This procedure also compensates for the calibration shift that can occur when the orientation of the flowmeter during calibration is different than its installed orientation.
In general, in-situ zero adjustment should be performed after re-installing target flowmeters.
Operating a target flowmeter above its maximum flow rate can cause the calibration to shift and potentially damage the suspension system of the flowmeter.
Note also that operating target flowmeters continuously for extended periods of time can cause a mechanical shift to occur that can affect the zero. Because the target may not return to exactly the same position after being exposed to forces over time.
Rapidly changing flow, such as slug flow conditions, two-phase flow, and start-up conditions (gas to liquid transitions). Can similarly affect the mechanics of the target flowmeter and hence its zero. Therefore, it is advisable to periodically verify the zero adjustment of target flowmeters.
When the medium flows in the measuring tube, the pressure difference caused by its own kinetic energy passing through the blocking member (target). And has a force on the blocking member. The magnitude of the force is proportional to the square of the velocity of the medium.
The mathematical way is as follows: F = CdAρ • V2 / 2
In the formula: F —— the force of the choke (kg) Cd-object resistance coefficient A ——Axial projection area of the choke on the measuring tube (mm2) ρ ——Density of medium under working conditions (kg / m3) v-average flow velocity of the medium in the measuring tube (m / s) The force F received by the choke member (target) is transmitted to the capacitive force sensor via a rigidly connected transmission member (stem).
And the capacitive force sensor generates a voltage signal output: V = KF In the formula: V——Voltage output by the capacitive force sensor (mV), K——Proportional constant, F——The acting force of the choke (target) So, after the voltage signal is pre-amplified, AD converted. And processed by the computer. The corresponding instantaneous flow and cumulative total can be obtained.
How Target Flowmeters Work
Target flowmeters measure flow by measuring the amount of force exerted by the flowing fluid on a target suspended in the flow stream.
The force exerted on the target by the flow is proportional to the pressure drop across the target.
Like differential pressure flowmeters. Bernoulli’s equation states that the pressure drop across the target (and hence the force exerted on the target) is proportional to the square of the flow rate.
Using this relationship, 10 percent of full scale flow produces only 1 percent of the full scale force.
At 10 percent of full scale flow, the target flowmeter accuracy is dependent upon the transmitter being accurate over a 100:1 range of force.
Transmitter accuracy is typically degraded measuring low forces in its range, so flowmeter accuracy can be similarly degraded.
So, this non-linear relationship can have a detrimental effect on the accuracy and turndown of target flowmeters.
Remember that of interest is the accuracy of the flow measurement system — not the accuracy of the transmitter.
How to Use Target Flowmeters
Target flowmeters inferentially measure the flow of liquids and gases. Such as water, air, industrial gases, and chemicals.
Be careful using target flowmeters on fluids that can coat the target. Because the flowmeter accuracy can be degraded.
This flowmeter can be applied to sanitary, cryogenic liquids, relatively clean, and corrosive liquids.
Thematerials of construction of all wetted parts, including the flowmeter body and seals, should be considered.
Inline target flowmeters are available up to approximately 6 inches in size.
Insertion target flowmeters are available for larger line sizes.
Applications requiring sanitary piping systems are often found in the pharmaceutical and chemical industries. Such as in the manufacture of drugs and vitamins.
Sanitary applications are especially prevalent in the food and beverages industry where cleanliness is important.
Applications for target flowmeters are found in the mining, mineral processing, pulp and paper, power, petroleum, chemical, and petrochemical industries.
Common applications include the measurement of process and cooling water flows.
As the most accurate and also the most expensive technology, Coriolis mass flow meters are the main instrument type used in scientific applications. They can measure corrosive and clean gases and liquids.
Coriolis mass flow meters are designed and produced according to the world’s latest Coriolis technology. It has a better appearance, stability, and accuracy. It can measure the mass flow of fluids flowing through the pipeline and is widely used in alternative energy, oil and gas, chemical, food, and other fields. Beverages, industrial energy, marine, metal and mining, power, pulp and paper, water and wastewater industries, etc.
Flow meters are the eyes of industrial production. Flow measurement is one of the components of measurement science and technology. It is closely related to the national economy, national defense construction, and scientific research. Doing this job well plays an important role in ensuring product quality, improving production efficiency, and promoting scientific and technological development. Especially in today’s energy crisis and the era of increasing automation of industrial production, the status and role of flow meters in the national economy have become more obvious.
Turbine flow meters are velocity flow meters, also called impeller flow meters. Can be used to measure the instantaneous flow and cumulative flow of liquids and gases.
Turbine flowmeters are widely used in flow measurement: petroleum, organic liquids, inorganic liquids, liquefied gas, natural gas, coal gas and cryogenic fluids. Turbine flowmeter signals can be divided into pulse signals or current signals (4-20mA). It is suitable for use with secondary display, PLC, DCS and other computer control systems.
Vortex shedding flow meter is also called Vortex flow meter. Vortex shedding flow meter is suitable for measuring steam flow rate as well as liquids and gases.
Vortex shedding flow meter, easy installation, low cost, analog, and 4-20mA output. Pressure & temperature compensation can improve the sensor for more accurate measurement. Vortex shedding flow meter is suitable for measuring steam and various liquids and gases. When the fluid flows through the assembly line of the vortex flowmeter, a vortex is formed. The frequency of vortex shedding is directly proportional to the fluid velocity.
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.
Liquid Mass Flow Meter can perform accurate mass measurements for liquids or slurries. Used for volumetric flow metering of liquids in pipelines. Such as diesel fuel, fuel oil flow measurement.
Liquid mass flow meter, we mean the mass flow meter can measure the flow rate of liquid, like the: diesel fuel, fuel oil, water, caustic, and gases/vapors. And we can use the thermal mass flow meter for the gas flow rates measurement. Coriolis mass flow meter is well known to everyone. Sino-Inst offers liquid mass flow meters based on the Coriolis mass theory.
Sino-Inst offers a variety of mass flow meters for flow measurement. If you have any questions, please contact our sales engineers.
The gas flow measurement does not require temperature and pressure compensation, and the measurement is convenient and accurate.
Multivariable flow: Provide accurate measurement for a series of variables. Including mass flow, volume flow, total flow, density and temperature.
Using MVD multivariable digital technology converter: from analog signal processing to digital signal processing. A stable signal can be generated, thereby improving response speed and measurement accuracy.
Easy to use: LCD display. Users can directly and conveniently perform configuration operations through touch buttons in English.
The CMF mass flowmeter can be monitored in the following areas to meet the needs of its ingredients, mixing processing and commercial measurement:
Chemical industry, such as systems with chemical reactions
Petroleum industry, such as moisture content analysis
Oil industry, such as vegetable oil, animal oil and other oils
Pharmaceutical industry
Paint industry
Paper industry
Textile printing and dyeing industry
Fuel industry. Such as oil, heavy oil, coal water slurry and other fuels, lubricants
Food industry. Such as dissolved gas drinks, health drinks and other liquids
Transportation industry. For example, the metering of pipeline transportation liquid
Liquid Mass Flow Meter working principle
Coriolis mass flowmeters measure the force resulting from the acceleration, caused by mass moving toward (or away from) a center of rotation.
This effect can be experienced, when riding a merry-go-round, where moving toward the center will cause a person to have to “lean into” the rotation so as to maintain balance.
As related to flowmeters, the effect can be demonstrated by flowing water in a loop of flexible hose, that is “swung” back and forth in front of the body with both hands. Because the water is flowing toward and away from the hands, opposite forces are generated and cause the hose to twist.
They represent about 21% of all flowmeters sold.
In a Coriolis mass flowmeter, the “swinging” is generated by vibrating the tube(s) in which the fluid flows.
The amount of twist is proportional to the mass flow rate of fluid passing through the tube(s).
Sensors and a Coriolis mass flowmeter transmitter are used to measure the twist and generate a linear flow signal.
How do you calculate mass flow rate?
As shown, when a mass point of mass m moves at a velocity υ in a pipe that rotates at an angular velocity ω for the p-axis, the particle is subjected to acceleration of two components and its force.
a. The normal acceleration is the centripetal force acceleration αr, the magnitude of which is equal to ω2r, the direction is toward the P axis;
b. Tangential acceleration αt is the Coriolis acceleration, the magnitude of which is equal to 2ωυ, and the direction is perpendicular to αr.
Due to the compound motion,
Coriolis Fc=2ωυm acts on the αt direction of the particle, and the pipe acts on the particle with a reverse force of -Fc= -2ωυm.
When a fluid of density ρ flows at a constant velocity in a rotating pipe, any pipe of length Δx will be subjected to a tangential Coriolis force of ΔFc.
Where A is the cross-sectional area of the pipeline. Since the flow rate of the mass flow meter is δm, δm=ρυA.
Therefore, directly or indirectly measuring the Coriolis force generated by the flowing fluid in the rotating pipe can measure the mass flow, which is the basic principle of the Coriolis mass flowmeter.
However, it is difficult to generate Coriolis force by the rotary motion.
At present, the product is replaced by a pipe vibration, that is, a thin-walled measuring tube fixed by two broken ends,at the midpoint of the measuring tube resonance or near resonance frequency.
Excitation, the fluid flowing in the tube generates Coriolis force, causing the opposite direction of deflection in the front and rear half points of the measuring tube. And electromagnetically detecting the amount of deflection to obtain mass flow.
Since the density of the fluid affects the vibration frequency of the measuring tube, and the density has a fixed relationship with the frequency, the mass flow meter can also measure the fluid density.
Liquid carbon dioxide refers to the liquefaction of carbon dioxide gas into liquid form under high pressure and low temperature. Liquid carbon dioxide is a refrigerant that can be used to preserve food and can also be used for artificial rainfall. It is also an industrial raw material that can be used to make soda ash, urea and soda.
Generally, a mass flow meter can be used to measure the mass flow of liquid carbon dioxide. Or, you can also use our spur gear flow transmitter to measure.
Liquid Nitrogen Mass Flow Meter
Coriolis mass flow meters can also measure the mass flow of liquid nitrogen. The measurement effect is also very good. However, the cost of Coriolis mass flow meters is relatively high.
Therefore, sometimes, we can also use a flow meter for him to measure the flow of liquid nitrogen.
A liquid nitrogen flow meter is a commonly used cryogenic flow meter. The low-temperature turbine flowmeter is a dedicated liquid nitrogen flowmeter. It can also be used to measure cryogenic liquids such as liquid oxygen.
Liquid nitrogen refers to Liquid with extremely low temperatures. In industrial production, liquid nitrogen can be used as a deep refrigerant. The low-temperature turbine flowmeter is used as a liquid nitrogen flowmeter, which can work at a low temperature of -196°C (-320.8 °F). Liquid Nitrogen Flow Meter’s Turbine sensor structure at ultra-low temperature (-196℃) is made of special customized material. Realize the instantaneous and cumulative flow monitoring of liquid nitrogen.
FAQ
The mass flow meter directly measures the mass flow of the medium passing through the flow meter, and can also measure the density of the medium and indirectly measure the temperature of the medium. Since the transmitter is an intelligent instrument with a single-chip microcomputer as the core, more than a dozen parameters can be derived for users to use based on the three basic quantities mentioned above. The mass flow meter has a flexible configuration, powerful functions, and a high performance-price ratio. It is a new generation flow meter.
②Deduced mass flow meter That is, a combination of the volumetric flowmeter and density meter is used to measure mass flow. At the same time, the volume flow rate and fluid density are detected. The output signal related to the mass flow rate is obtained through calculation.
③Compensating mass flowmeter At the same time, the volume flow rate of the fluid and the temperature and pressure of the fluid are detected, and then according to the relationship between the density of the fluid and the temperature and pressure. The density value of the fluid in this state is calculated by the calculation unit. Then calculate the mass flow value of the fluid.
The mass flow meter is a function of fluid volume and fluid temperature and pressure. Is a dependent variable. The quality of a fluid is a quantity that does not change with time, space temperature, and pressure.
The electromagnetic flowmeter is a pure liquid volume measurement instrument.
Flowmeter is one of the important measuring instruments in process automation instruments and devices.
According to the physical properties of the measured medium, it can be divided into liquid flow meters and gas flow meters.
Among them, there are many types of liquid flow meters.
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.
Ultrasonic flow meters, using the ultrasonic principle, measure the velocity of flow.
We can use a different type of ultrasonic flow meters, like: Portable ultrasonic flow meter, Handheld ultrasonic flow meter, Clamp-on Ultrasonic Gas Flow Meter.
For airflow, natural gas, water, velocity measurement. There are two types of ultrasonic flow meter technologies: Doppler shift and transit-time. Transit-time measures the time differential between signals sent upstream and downstream.
The differential is directly proportional to the velocity of the water.
Transit-time meters are best used for measuring the flow of clean liquids and, as a result, are the most popular type of ultrasonic meter.
Doppler shift measures the difference in frequency of the sound wave, reflected off gas bubbles or particles in the flow stream, and is suitable for aerated or dirty liquids.
Ultrasonic flow meter advantages and disadvantages
Generally, an ultrasonic flow meter is the device, that uses ultrasound to measure the velocity of liquid flow, that helps in determining the volume of liquid flow also.
The ultrasonic flow meters are made using the ultrasonic transducers, which are clamped to the external surface of a pipe, to generate the ultrasonic pulses through the pipe.
When the liquid flows inside the pipe, it creates the time difference in the pulses, and these are examined to calculate the accurate flow velocity of the liquid.
There are many advantages of using the ULTRASONIC flow meters which include:
The electronics in the ultrasonic flow meter includes ultrasonic flowmeter detector which compensates and adapts to the changes in the profile of the flow, type of the liquid and material of the pipe.
A portable ultrasonic flow meter converter can be used as a direct method to determine the flow rates effectively when compared to the other flow systems.
Ultrasonic flow meter converter is inexpensive to use and maintain when compared to the other mechanical flow meters as they are no moving parts in these flow meters.
Their design is highly sophisticated and they do not obstruct the liquid flow, so they can be used for sanitary, corrosive and abrasive liquids.
These are the advantages of the ultrasonic flow meters and there are many disadvantages of the Ultrasonic flow meter which include:
The main disadvantage of the ultrasonic flow meter is the cost. The cost of the flow meter is very high when compared to the other types of mechanical flow meters.
The ultrasonic flow meters are sophisticated when compared to the mechanical flow meters, so it needs experts to repair and maintain the flow meters.
These are the advantages and disadvantages of the ultrasonic flow meters.
Ultrasonic flow meter Types
According to the measurement principle
(1) Time difference method ultrasonic flowmeter; (2) Frequency difference method ultrasonic flowmeter; (3) Phase difference method ultrasonic flowmeter; (4) Doppler ultrasonic flowmeter; (5) Ultrasonic flowmeters for partially full pipes and river channels that combine liquid level measurement and average velocity measurement.
Ultrasonic Clamp on Flow Meter is composed of an integrated host and external clamp on sensors. Clamp on Flow Sensors are available at room temperature and high temperature.
Clamp on flow meter (Model: 2000) is composed of an integrated host and ultrasonic clamp on sensor. Clamp on flow meter is widely used in online flow measurement of various liquids. Just stick the external clamp sensor on the pipe surface. Compared with the traditional flowmeter, it does not need to cut off the pipe and flow. The installation is convenient and quick, and the non-destructive installation is truly realized.
Portable Ultrasonic Flow Meter is a handheld ultrasonic flow meter. The clamp-on sensor is used to measure liquid flow in industrial pipelines.
Handheld ultrasonic flow meter realizes the non-contact measurement of liquid flow. Also often referred to as Portable Clamp-On Ultrasonic Flow Meter for Liquids.
Handheld Ultrasonic Flow Meter ( Model:2000H) has been successfully applied to measurement work in various industries. The measuring range is 20-6000mm (0.5-20 inches). A non-contact measurement method is adopted. Flexible operation and easy to carry. Conductive or non-conductive, corrosive or non-corrosive liquids can be measured. Various fluids: water, pure water, sewage, sea water, chemical fluids, river water, fuel Oil etc. can be measured.
Fuel flow meters, also known as turbine flow meters, are the main types of speed flow meters. A freely rotatable impeller is installed in the fluid flowing pipe. When the fluid passes, its motion can make the impeller rotate. The larger the fluid flow rate, the larger the kinetic energy and the higher the impeller speed.
The fluid flow can be determined by measuring the number of revolutions or the number of revolutions of the impeller.
Ultrasonic flow detector is also an ultrasonic sensor. Or called an ultrasonic flowmeter. Ultrasonic flow detector is composed of sensor and host. The host has wall-mounted, handheld, portable, etc. Sensors are classified into the following models according to the measuring pipe diameter and measuring temperature. It can help users measure pipeline flow under various working conditions.
Optional Transducer
Ultrasonic flowmeter refers to a flowmeter developed based on the principle that the propagation velocity of ultrasonic waves in a flowing medium is equal to the vector sum of the average velocity of the measured medium and the velocity of sound waves in a stationary medium.
It is mainly composed of transducer and converter, and there are different types such as Doppler method, velocity difference method, beam shifting method, noise method and correlation method.
Clamp-on or tube-segment ultrasonic flow meter is based on the principle of “velocity difference method”. It is an instrument for measuring the liquid flow in a circular tube.
Ultrasonic flow meters for measuring liquid flow. Measurement linearity is better than 0.5%. Repeatability accuracy is better than 0.2%. The time difference measurement resolution of up to 40 picoseconds enables the measurement accuracy to reach ±1%.
When choosing an ultrasonic flowmeter, the following points are mainly considered:
1.Measuring medium. 2. Pipe material. 3. Velocity range. 4. Diameter range. 5. Applicable temperature. 6. Medium turbidity. 7. Pipe lining. 8. Acceptable form of installation.
Specifications of Slurry Flow Meter Benefits of Magnetic flow meter for slurry Working Principle of Slurry Flow…
Sino-Inst, Manufacturer for Ultrasonic Flow Meters. It can measure a single sound-conducting liquid medium of DN 25—150mm. It can measure even liquids such as water, sea water, oil, and slurry.
Sino-Inst’s Ultrasonic Flow Meter, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, US, and other countries.
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.
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