Amazing Solutions for Continuous Liquid Level Measurement

Posted on February 25, 2020 by KimGuo11

Looking for a specific type or a custom continuous liquid level sensor? Sino-Inst offers High quality Liquid level sensors for continuous level measurement.

Continuous Liquid Level Measurement Solutions

Level sensors are used in process control in many industries and they fall into two categories. Continuous level measurement sensors and Point level measurement sensors.

The point level measurement sensor is used to indicate a single discrete level, that is, to indicate a preset level. The function of this type of sensor is the upper limit alarm, which indicates the overfill condition, or the lower limit alarm condition.

Continuous level sensors are more complex, allowing level monitoring of the entire system. They measure the level of the liquid level in a range, not the level of a point. Continuous level sensors produce an analog output that is directly related to the liquid level in the container. To build a level measurement system, this output signal is transmitted to the process control loop and visual indicators.

Sino-Inst offers a variety of Level senors for Continuous level measurement. If you have any questions, please contact our sales engineers.

Featured Continuous Level Sensors

**SI-LT Magnetostrictive level transmitter with Local Digital Display**

**SI-100 Magnetostrictive Level Sensor**

**SI-U02 Multi-Point Liquid Level Float Switch**

**ULT-100A Ultrasonic Level Transducer**

**SMT3151TR Submersible Level Transmitter–2Mpa,200m**

**SIRD90 Radar Level Transmitters, Non-Contact**

**SIRD70 Guided Wave Radar (GWR) Level Transmitters**

What is a Continuous Liquid Level Sensor?

Continuous level sensor definition

Continuous level sensors are transmitters that measure liquids within a specified range. Level sensors determine the exact amount of liquid that provides a continuous analog signal. The level signal can be displayed directly on site or integrated into a process control or management system. These products can be installed vertically and horizontally. They are ideal for monitoring liquids in confined or restricted areas.

Wikipedia: Level sensor

Difference between a point level sensor and a continuous level sensor?

Point level sensor

A sensor designed for point detection will detect liquid at a certain point in the tank or chamber. Generally, this applies to processes that require high-level or low-level management.

In most cases, they act as switches when the tank level rises or falls to a certain level. This could be an alarm or a bonding device. Essentially, the sensor detects when the liquid has reached the desired point, and it acts as a switch to activate the necessary response.

Continuous level sensor

The continuous level sensor is designed to detect the level through every point in the tank or chamber. This means that it provides feedback regardless of the level and the entire container range. This is great for processes where level is always important, and for applications that require increased accuracy.

Extended Reading: How to Measure Volume of Liquid

A point level sensor is a device that can detect the presence or absence of almost any liquid medium. Typically, these sensors are used in processes that need to detect high or low levels.

Generally, common applications requiring point sensors fall into two categories:
Leak detection – to prevent costly damage or service interruption to equipment or level measurement – to prevent spillage or dry conditions.

The technology works like a switch. When the level of a tank or container reaches or falls below a certain threshold. It drives an action.

A wide range of point level sensors are available for many applications and materials.

The float level sensor is a common point level sensor.
The float level switch consists of a fixed rod and a float.
The float has a built-in permanent magnet, which moves freely along the fixed rod with the rise and fall of the liquid level. The magnetic field of the permanent magnet acts on the reed switch, and the closer it is to the reed switch, the stronger the force. When the threshold is reached, the reed switch is closed.
The float level sensor has a robust structure and a measurement deviation of less than 1%.

For point level detection applications requiring no moving parts. Optical liquid level sensors are a good option.
Optical liquid level sensors are suitable for high, medium and low liquid level detection. and fits almost any installation. It has no moving parts, emits infrared light through LEDs, and calculates liquid level changes based on the amount of reflected light.
Optical level sensors are available in custom high temperature models and in different sizes to meet the needs of different applications.

Capacitive level sensors are suitable for reflective, viscous or viscous fluids. According to their principle, capacitive sensors enable non-invasive measurements. Internal level changes can be measured without drilling holes in the vessel under test.

Ultrasonic liquid level sensors work by emitting and measuring reflected high-frequency sound waves, which can withstand high pressure, high temperature and vibration. It is suitable for measuring liquids without foam and air bubbles. Ideal for applications in agriculture, mining, construction, printing, and specialty vehicles.

Extended reading: How does a Radar Corrosive Liquid Chemical Level Sensor work?

Continuous level sensor 4-20 ma

Sino-Inst provides signal output for all continuous level sensors. Analog signal output, 4-20mA output, 0-5V, RS485, HART optional.

Advantages of current signal (4 ~ 20mA signal)

The current signal is suitable for long-distance transmission. Because the current signal is not affected by the resistance of the wire. And the voltage signal will be divided when the wire itself has resistance, resulting in inaccurate measurement. Generally, the maximum transmission distance of 4 ~ 20mA is controlled within 100m, and it is recommended to use digital signals (485 communication)
The current signal generally uses a two-wire system, and the voltage signal generally uses a three-wire system. In contrast, the two-wire system saves materials and reduces costs than the three-wire system.
Compared with the on-site working conditions, the anti-interference ability of the current signal is stronger than the voltage signal. In the case of interference, it is recommended that the user select a 4 ~ 20mA signal.
The current signal can appropriately exceed the range of the range and output inaccurate signals. For example, a pressure transmitter with a range of 1MPa and an output of 4-20mA can output 24mA when it exceeds the range. The voltage signal is slightly different depending on the power supply. For example, a pressure transmitter with a range of 1 MPa and an output of 0 to 10 V cannot output signals above 9 V when the power supply is 9 V.
When the wire materials are not the same (such as copper, nickel), a magnetic field will generally be generated. And the voltage signal will have an error, and the current signal will not be required in the case of higher accuracy requirements.

Continuous Level Sensor can also be used with paperless recorder.

Measuring techniques for continuous level measurement

1. Ultrasonic Level Sensors

Ultrasonic Level Transmitters provide non-contact and maintenance-free level measurement, (Like the Radar ) for fluids, pastes, sludges and powdery to coarse bulk materials.

Ultrasonic level measurement, easy installation, wireless, portable and can be explosion-proof.Sonic is the sound we can hear. Ultrasonic is the sound above the human hearing range.

A human can hear maximum up to a frequency of 20 KHz. Ultrasonic frequencies are above 20 KHz. Ultrasonic waves are used to measure the level of liquids and solid objects in industries.

Ultrasonic level measurement is the contactless principle and most suitable for level measurements of hot, corrosive and boiling liquids.

The normal frequency range used for ultrasonic level measurements is within a range of 40-200 KHz.

Extended reading: Ultrasonic liquid level sensors

2. Hydrostatic (Pressure) Level Transmitters

Hydrostatic level transmitters, also called submersible level transmitter, or pressure level transmitters. For Hydrostatic level measurement, Continuous level measurement in liquid applications with pressure sensors. These transmitters help in determining fluid level of a container. By measuring the pressure of resting body of the fluid within it.

3. Continuous Level Radar Sensors

Radar level transmitter, also called Radar level gauge. Non-contact Continuous level measurement in liquids and solids with free space radar sensors.

Non-contacting radar, based on microwave technology, detects only surfaces that reflect energy. These transmitters work on the principle of radar by using radio wave emissions. Mounted at the top of a tank filled with a liquid.

The transmitter sends a radar signal into the liquid and receives a reflection of the signal. The transmitters then analyze the current fill level of the tank based on the time taken by the transmitted signal to return.

Extended reading: Radar Liquid Level Sensor|Corrosive, steam, volatile liquids

4. Guided Wave Radar Level Sensors

Guided Wave Radar (GWR) Level Transmitters, also called wave guided radar level transmitter. Using guided wave radar technology, GWR level transmittershave no moving parts. They can measure both level and the interface between two media.

Continuous level measurement in liquids and solids with guided wave radar sensors. These transmitters work by sending a microwave pulse through a sensor cable or rod. The signal hits the surface of the liquid, and travels back to the sensor, and then to the transmitter housing.

Based on the time taken by the signal to travel down the sensor and back up again. The electronics integrated in the transmitter housing determine the filling level.

Extended Reading: Silo/Bin material level measurement system

5. Capacitance level detectors

Capacitance level detectors, also known as Capacitance level transmitter. RF Capacitance Level Transmitter offers continuous and point level detection. In liquids and solids with capacitance probes.

These transmitters use liquid stored in a tank or container as a dielectric medium between two or more electrodes. The energy capacity of the capacitor circuit increases when there is more liquid, and decreases if there is less liquid. Measuring the variations in the capacitance value, capacitance level transmitters calculate level of the tank.

Read more about: Capacitive Level Measurement Principle.

6. Magnetostrictive level transmitter

Magnetostrictive level transmitter, in-tank liquid level transmitter, is a continuous magnetic level gauge. The magnetostrictive level sensor, measure the level of fluid in the vessel.

By detecting the level of the magnets contained within the float and then transmits the measurement back to the control system.

7. Magnetic Float level sensors

Magnetic Float level sensors are continuous level sensors featuring a magnetic float that rises and falls as liquid levels change.

The movement of the float creates a magnetic field that actuates a hermetically sealed reed switch located in the stem of the level sensor, triggering the switch to open or close.

Comparative analysis – 7 Tank Level Measurement Sensors

Magnetostrictive Level Sensor in Storage Tank Level Measurement

Applications

Continuous level sensors are versatile in monitoring liquid level needs. They can monitor water, diesel, lube oils and fuels, as well as various chemical and petrochemical liquids. And compatible with corrosive and non-corrosive substances.

Continuous level sensors are and used by industries including:

Food and Beverage
HVAC
Medical
Printing
Off-Highway Vehicles
Semiconductor
Oil and Gas
Agriculture
Wastewater Treatment
Concrete/Aggregate
Plastic/Vinyl
Marine
Chemical

Extended reading: Sludge Blanket Level Detector Appliactions

The Silo/Bin level measurement and control system solves the problem of frequent dumping accidents in the powder silo of the mixing station during the feeding process. It avoids the problems of dust flying, waste of cement, and environmental pollution. It reduces the equipment damage caused by the collapse of the dust removal hood of the mixing station Other issues and prevents the safety issues of the workers present.

Extended Reading: Silo/Bin material level measurement system

Generally, we can use radar level sensors, ultrasonic, or guided wave radar to measure.

**SI-FMF15 FMCW Radar High Temperature Level Sensor**

**SI-FMF21 FMCW Radar Silo Level Sensor**

**Alternative to VEGAPULS 64-80GHz FMCW Level Radar**

**SIRD-701 Guided Wave Radar Level Sensor**

**SIRD-702 GWR Corrosive Liquid Chemical Level Senso**

Tank level senor is a level sensor used to measure the tank level. The liquid level is the level of the liquid in a sealed container (such as a water tank) or an open container (water tank). The instrument that measures the liquid level is called a liquid level sensor, a liquid level gauge or a liquid level transmitter. The liquid level sensor is a kind of level instrument. Hydrostatic, Ultrasonic, Magnetostrictive, Radar, Differential Pressure are commonly choices for tank level measurement. Liquid level sensors have been around for decades for leak detection or level measurement. Common measured medium are: Water, Fuel, Diesel, Gasoline, diesel, liquefied gas, liquid ammonia, etc.

Read more about: Level Senors for Tank Level Measurement

To measure the powder level, most of the radar level gauges and ultrasonics are used. Or heavy hammer level gauge.

High-frequency radar level gauge application: powdery solids, or environments with a lot of dust
① coal bunker, cement bunker, clinker bunker,
② Flour, corn flour, rice flour, sorghum flour, etc.
③Iron powder, aluminum powder, etc.

Ultrasonic level meter (ultrasonic level sensor) is used to measure the level of solid materials such as coal, ore, corn, wheat, glass, straw, garbage, wooden boards, automobiles, plastic particles, etc. It is used in metallurgy, mining, grain processing, storage, security and other industries.

Extended reading: Non Contact Liquid Level Sensor Working Principle

A laser level transmitter is also called a laser level meter. Industrial Accurate, non-contact, and uninterrupted real-time monitoring of material height. Designed for material level and liquid level. A laser level transmitter is a continuous or high-speed pulsed laser beam emitted by a semiconductor laser.

The laser beam meets the surface of the object to be measured and reflects. The light return is received by the laser receiver. And accurately record the time difference between laser emission and reception. In order to determine the distance from the laser radar to the measured object. Laser level transmitter is similar to radar/ultrasonic level sensor.

Read more about: Laser Level Transmitter

There are many types of liquid level sensors that can measure water. From our personal experience, hydrostatic submersible level sensors are the easiest to use and relatively low cost.

Extended reading: Hydrostatic Level Measurement

But,

Sometimes, due to the limitation of measurement conditions, it is necessary to select the external water tank level indicator.
Our Sino-inst external water tank level indicator is based on ultrasonic principle.
When measuring with External Tank Level Indicator, install the ultrasonic probe just below the outer wall (bottom) of the container under test. No need to cut holes, easy to install. Does not affect on-site production. It can realize accurate measurement of various toxic substances and various pure liquids in high temperature and high pressure airtight containers.

Read more about: External Tank Level Indicator

How to select a continuous level sensor?

Selection of level measurement sensor.

Issues to consider before selecting a level measurement sensor include:

Measure liquid or solid?
What is the temperature and pressure range of the application environment?
Need point level measurement or continuous measurement?
What is the level measurement range required?
Is the measured material conductive?
Will the measured material cover or accumulate on the surface?
Will there be turbulence, foam or steam on the liquid surface?
Do you need contact or non-contact level measurement?
What kind of output is required, analog, relay, digital display or other?

Extended Reading: Laser level transmitter working principle

Frequently
Asked
Questions

Help Center

In continuous level measurement, the level of a medium in a tank or silo is detected with the help of different measuring methods and converted into an electronic signal.

Continuous level sensors are more complex, allowing level monitoring of the entire system. They measure the level of the liquid level in a range, not the level of a point, and therefore produce an analog output that is directly related to the liquid level in the container. To build a level measurement system, this output signal is transmitted to the process control loop and visual indicators.

There are 7 main types of level transmitters that Sino-Instrument offers. Each type of transmitter works in a different way, and makes it useful for different types of processes.

Level Transmitters

The point level measurement sensor is used to indicate a single discrete level, that is, to indicate a preset level. Normally, the function of this type of sensor is the upper limit alarm, which indicates the overfill condition, or the lower limit alarm condition.

What are the common types of oil level sensors?

Magnetic float sensor: Developed according to the principle of buoyancy and magnetic coupling, with good visibility of characteristics and direct reading of values;
Pressure sensor: Use liquid pressure to measure liquid depth, suitable for measuring water depth in river channels;
Capacitive sensor: Utilize the principle that the capacitance formed between the probe and the container changes linearly with the liquid (material) level. There is no moving or elastic component. Impact resistance, easy installation, high accuracy, high reliability;
Magnetostrictive sensor: The principle of the sensor is to generate a longitudinal magnetic field through a permanent magnet and another magnetic field through an electric current. When the two magnetic fields intersect the waveguide, the waveguide generates a “magnetostrictive” phenomenon, and a strain pulse is generated instantly. Features It is fast and accurate. It is mostly used for liquid measurement in tank trucks;
Float sensor (reed switch): It is more common. Nowadays, the automatic oil level sensors of automobiles belong to this category. The working principle is to use the buoyancy of liquid on magnetic floating ball, and the dry spring of floating ball level gauge is magnetically attracted to change the liquid level position into an electrical signal. The reed switch is connected in sections, and the length of each section is the test accuracy of the level gauge.

The working principle of the oil level sensor device is through the continuous acquisition of the relative percentage signal of the oil level sensor. With the calibration algorithm, it is converted into the corresponding volume information. The fuel quantity of the fuel tank is monitored. Combined with the GPS system, the vehicle is known Driving status.

Point-level switches are used as high-level and spill-prevention alarms, low-level and pump-protection alarms, and to turn pumps on and off. Continuous level (proportional) measurement, on the other hand, indicates the level in a vessel over the full span of measurement.

Point level measurement is different from Continuous Level Measurement. Used to detect material levels in tanks or silos.

There are high levels (with material) and low levels (without material).

High level measurement allows containers to be filled to full capacity while preventing overflow situations.

Low level measurement alerts facilities to the need for replenishment, preventing process and/or plant downtime.

Technical Support

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Sino-Inst offers over 40 Continuous Level Measurement Sensors. About 50% of these are liquid level meters, 40% is the tank level sensor.
A wide variety of Continuous Level Measurement Sensors options are available to you, such as free samples, paid samples.
Sino-Inst is a globally recognized supplier and manufacturer of Continuous Level Measurement Sensors instrumentation, located in China.

Request a Quote

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KimGuo11

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.

drurylandetheatre.com

SI-U05 Cable Float Level Sensor & Swtich

Posted on February 21, 2020 by KimGuo11

Cable Float Level Sensor (Float level switch) for water/level switch control.

Cable Float Level Sensor (Float level switch) is a high performance level control switch. It can control the work of the liquid pump, adjusting the liquid level. And it can also be installed in the submersible pump to control and protect the motor. High sealing performance is guaranteed by polypropylene injection. It is a switch that can adjust the liquid level in a bucket, tank or well. Cable Float Level Sensor is self-adjusting, easy to operate, easy to install and maintenance-free. It has a resistance to sewage. It is used in mines, oil, irrigation containers, etc.

Please feel free to contact us for Techinical Support, or Request a quote for float level sensors (customization available).

More Float Level Sensors

The Cable Float Level Switch is designed using the principles of gravity and buoyancy. Cable Float Level Sensor has a simple and reasonable structure. Including: A floating body. A large-capacity miniature switch set in the floating body.

A driving mechanism capable of turning the switch on and off. And a three-core cable connected to the switch. The outstanding feature of this product is its stable and reliable performance. Cable Float Level Sensor has no malfunction caused by the fluctuation of the liquid surface.

At the same time, it has the characteristics of convenient installation, low price and long service life. This product can be used with various liquid pumps, and automatic control of water levels in water supply, drainage and rotten liquids.

Features of SI-U05 Cable Float Level Sensor

Cable Float Level Sensor can be matched with various liquid pumps. And is widely used for automatic control of water levels in water supply, drainage and corrosive liquids.

Simple construction.
Reliable performance. The product can send switch control signals under normal conditions. Strong reliability.
Durable and long life.
Easy installation method. Convenient adjustment method. Adjustable water level control range.
Simple circuit. Economical and practical operating voltage 220v. Current 10A. Simple circuit and low cost.
Resistant to corrosion.

Specifications of SI-U05 Cable Float Level Sensor

Float Materia:	PP, SUS304
Contact Capacitance:	10A/250VAC(PP),2A/250VAC(SUS304)
Contact type:	1A,1B or 1AB(PP),SPDT(SUS304)
Cable specification:	Rubber cable and PVC(PP),Silicone:0.75mm²×3C(SUS304)
Suitable temperature:	Rubber cable: -10℃~80℃,PVC cable:0℃~60℃,Silicone: 0~170℃
Gravity:	>0.6g/cm³(PP),>0.5g/cm³(SUS304)
Lead length:	2m 3m 4m 5m 10m, etc. Other lengths can be customized
Applicable medium:	Clean water, sewage, oils and acid-base liquids below medium concentration

Applicaitons of Cable Float Level Sensor & Swtich

Water level monitoring
Tank level control
High or low level alarm
Municipal water control
Industrial water control
Filling or draining reservoirs and tanks
Pump automation
General pump control
Pump control in wastewater
Suitable for low specific gravity materials
Can handle high operating temperatures
Clean fluids with small process connections
Water and wastewater
Petrochemical
Chemical

Extended reading: Ultrasonic Level Switch-External Mounted

Working Principle of Float Level Sensor

The Cable Float Level Switch is with simple structure of using micro switch or proximity switch or reed switch to control the contact. And it is user friendly design for level measurement. The switches will send out ON or OFF contact signal output. The floating angle is larger than a certain degree. Then the state of the iron ball and reed switch will be changed for actuation. For wastewater and applications at different temperatures, the material of the float can be selected from plastic to stainless steel. Cable float level switch controls long distance and multi-point contact detection. Cable float level switch can be used for transparent liquid and granular liquid industries.

Float Level Sensor Installation

Pass the wire of the float switch from the concave circle of the center of the weight. Push the weight gently to make the plastic ring embedded above the round hole fall off due to the thrust of the wire head. You can also use a screwdriver to remove this plastic ring. Then put the dropped plastic ring on the cable to set the water level by the weight you want.
Gently push the weight to pull out the cable until the center of the weight holds the plastic ring. As long as the heavy hammer is lightly buckled in the plastic ring, it will not slip. If the plastic ring is damaged or lost, it can be replaced with a light bare copper wire into the cable.
Please pull the cable directly to the control box. Avoid using the intermediate connector as much as possible. If there is a connector as a last resort, never immerse the cable connector in the water.

Image source: https://instrumentationtools.com/cable-float-level-switch-working-principle/

Other types of Float Level Switches

**SI-U03 Float Switch Water Level Controller**

**SI-U04 Magnetic Float Level Sensor-Reed Switch**

Liquid level float switch is a commonly used liquid level controller. For water Tank & Pump alarm and level control. Can be divided into Continuous Float Level Sensor and Point Level Float Switch. Read more about Guide for Liquid level float switches.

Q&A

What is float level switch?
How do you adjust a float switch?
What is liquid level sensor?
How many types of level switches are there?

The float level switch is based on the principle of buoyancy. The float ball moves a distance with the liquid surface, and this movement plays a limit role. A magnetic floating ball is used to generate a switching action with a reed switch, output a switching signal, and then control the liquid level through wiring.

The float level switch only needs to re-calibrate the water level line before we install it. The switch itself cannot be adjusted. At this time, use a multimeter to measure the switch state, and it will be turned on and off with the water level near the waterline, which means that there is no problem. Just make sure that the water level line of the thermal equipment is consistent during the installation. For example, the liquid level switch of SOR is generally attached to the water level line on the wall of the cylinder. We soak the switch in the water tank and slowly sink, so that the water surface gradually approaches the marking line. When it is closest, we will hear the micro switch action the sound of.
It should be noted that the working temperature of the high-level liquid level switch is high, and the water temperature inside is also high; the density of high-temperature water is less than that of room temperature water. Therefore, the action line of room temperature water is lower than the switch identification line.
Low level alarm is connected to normally closed (NC), high level is connected to normally open (NO). This type of switch is not difficult to install. The liquid level switch itself will have more than two pairs of micro-switches, which respectively output two pairs of normally open and two pairs of normally closed contacts, which are usually “on alarm” when applied.

The liquid level sensor converts the liquid level signal in the container into a switching signal or a voltage and current signal, and then through an external circuit, allows the surveyor to accurately know the liquid level in the container.
There are 7 main types of level transmitters that Sino-Instrument offers. Each type of transmitter works in a different way, and makes it useful for different types of processes.

Level Transmitters

Liquid level switch, also known as water level switch, liquid level sensor. The liquid level switch is a switch used to control the liquid level. It is mainly divided into contact type and non-contact type. Capacitive liquid level switches are commonly used in non-contact switches. And contact float type liquid level switches are most widely used. Electrode level switches, electronic level switches, and capacitive level switches can also be implemented using contact methods.

There are currently 6 medium level switches:

Float level switch: The magnetic float of the float level switch rises or falls with the liquid level. So that the sensor detects the position of the reed switch chip in the tube, and sends a contact on / off switch signal. Because of its simple structure and economic benefits, it is widely used in the market, mainly for civilian use. But its stability is relatively poor compared to industrial-grade products.
Capacitive liquid level switch: After the probe is wetted, it detects the change in capacitance value and outputs a contact signal, which has certain advantages in the measurement of slightly viscous media.
Electrode type liquid level switch: The electrode type liquid level switch uses the conductivity of the liquid to detect the level of the liquid. Once the measured medium touches the pole, it will conduct electricity and detect the signal. After the signal of the controller is amplified, a contact signal is output to realize the control of the liquid level.
The photoelectric liquid level switch: The photoelectric liquid level switch uses infrared detection, using the principle of refraction and reflection of light. The reflection or refraction of light at the interface between two different media. When the measured liquid is at a high level, the measured liquid forms a kind of interface with the photoelectric switch. When the measured liquid is at a low position, air and the photoelectric switch form another interface. These two interfaces make the intensity of the reflected light received by the light receiving crystal inside the photoelectric switch different. That is, correspond to two different switching states. Generally speaking, compared with other measuring instruments, the applicability of photoelectric switches is poor.
Tuning Fork Liquid Level Switch: It outputs a switch signal by detecting the change in the frequency and amplitude of the fork’s vibration, which is highly versatile. For the viscous working conditions, please consult with the manufacturer to determine the working conditions that are easy to crystallize.
Ultrasonic external liquid level switch: The instrument probe emits ultrasonic waves and detects its residual vibration signal in the container wall. When liquid passes through the probe, the amplitude of this aftershock signal becomes smaller. This change is detected by the meter and outputs a switching signal. It is a non-contact type and is often used in high-risk situations where it is difficult to open holes on the site, but the cost is relatively expensive.

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Sino-Inst is float level sensor manufacturer. On the premise of ensuring product quality, we offer you the best price.

Sino-Instrument offers over 10 level transmitters for level measurement.

About 50% of these are liquid level meters,

40% is the tank level sensor.

A wide variety of level meters options are available to you,

such as free samples, paid samples.

Sino-Instrument is a globally recognized supplier and manufacturer of level measurement instrumentation, located in China.

Request a Quote

KimGuo11

drurylandetheatre.com

SI-U04 Magnetic Float Level Sensor-Reed Switch

Posted on February 19, 2020 by KimGuo11

Magnetic Float Level Switches & Sensors with Magnetic Reed Switches for Continuous Level Measurement.

Magnetic Float Level Sensor works with Reed Switch, is a continuous level sensor. SI-U04 Magnetic Float Level Sensor-Reed operatess on a direct, simple principle. As the magnetic float rises and falls as liquid levels change. The magnetic field generated from the inside of the float drives the sealed reed switch installed in the stem. The stem is made of non-magnetic metal or strong engineering plastic. Magnetic Float Level Sensor gets the liquid level signal, transfers it into digital current signal and switching signal. Generally speaking, there are two structures of magnetic floats. Besides, the Magnetic Float Level Sensor supports multiple mounting methods. Such as top-mounted, side-mounted. So SI-U04 Magnetic Float Level Sensor can be applied to a variety of tank level measurements.

Please feel free to contact us for Technical Support, or Request a quote for float level sensors (customization available).

More Float Level Sensors

Features of Magnetic Float Level Sensor

Simple structure, stable and reliable, good repeatability;
Realize the connection measurement of the liquid level
Not affected by the physical and chemical state of the measured medium. Such as: the effects of conductivity, dielectric constant, foam, pressure, temperature, evaporation, boiling, and bubbles;
Use different materials, which can be used in various strong and weak corrosion, flammable and explosive, toxic, strong radioactive, and foul media environments;
Liquid level measurement or interface measurement of two different density media;
Explosion-proof structure design, suitable for use in explosive environments.
Two-wire 4-20mA current output, with 0.56 “LED digital display, convenient for long-distance observation at night.

Applications of Magnetic Float Level Sensor

Industries:

Marine (commercial ships)
Petrochemical
Food/beverage
Water/wastewater
Chemical and textile industry
Dyeing and finishing
Level control in shipping industry

Applications:

Liquid level measurement in hostile environments
For use in many toxic and corrosive chemicals
Tanks where up to three switch points are needed
Situations where vertical space is limited]
Boilers and Process Vessels
Control of industrial processes and dosing tanks

Any liquids including water, oil, and chemicals：

Diesel or Lube Oils
Vegetable Oils
Petroleum products
Water, Wastewater
Acids
Caustics
Fuels

Specifications of SI-U04 Magnetic Float Level Sensor-Reed Switch

Measuring range	200~6000mm(>6M customize)
Resolution factor	10mm,5mm,20mm
signal output	4~20mA(two-line)2000/m(1/2″,3/8″)
Loading resistance	500Ω
Transmitting	>1000m
Working power supply	16~30VDC
Density	≥0.5g/cm3
Pressure	PN2.5~PN160(×0.1MPa)(Max pressure PN320)
Operating temperature	-40 ~ 80 °C, ≤120 °C, ≤150 °C
Float ball diameter	Φ30~Φ120(depending on pressure and density)
Flange installation	DN40~DN150/RF/PL(HG/T20592~2009) customize2” thread(downward install)1/2” thread (upward install, resistance signal output) 3/8” thread(upward install, resistance signal output)
Installation angle	≤±25°
Electrical connection	M20×1.5 female thread three-lines screening cable
IP grade	IP65
Explosion-proof grade	Exia II CT6Ga,EXd IICT6Gb

Extended reading: Food grade flow meters for Food & Beverage industry

Operation Principle of Magnetic Float Level Sensor

Magnetic Float Level Sensor is composed of a reed switch, a precision resistor and a single-chip microcomputer circuit. When the magnetic force line of the magnetic float acts on a certain position of the liquid level gauge, the reed switch in that position is closed. The magnetic float follows the level change of the liquid level (interface). Linear 4 ~ 20 mADC signal output and relay contact output. Realize the detection, transmission and alarm control of the liquid (boundary) surface position signal.
The magnetic float level sensor uses imported high-quality sensing elements and signal conversion devices, which has excellent long-term stability and reliability.

Types of Magnetic Float

Magnetic floating ball (column type)
1.фmm (321, 316L stainless steel)
2.ф40mm (4 fluorine on stainless steel)
3.ф50mm (PVC, PP)
Note: The specification is the diameter of the floating ball, and the length depends on the density of the medium.

Magnetic floating ball (through the core)
ф76 × ф21 × 76
ф51 × ф15 × 51
ф28 × ф10 × 28
ф63 × ф25 × L (mm) is made of PVC and PP. L is determined by the density of the medium, and the diameter can be made according to user requirements.

Other types of Continuous magnetic float level switches

Float level sensors are continuous level sensors featuring a magnetic float that rises and falls as liquid levels change. The movement of the float creates a magnetic field that actuates a hermetically sealed reed switch located in the stem of the level sensor, triggering the switch to open or close.
Float level sensor is composed of float, plunger and so on. The float level sensor is installed on the top of the container through the connection flange. The float floats on the liquid surface according to the principle of discharging the liquid volume phase and so on. When the liquid level of the container changes, the float also moves up and down. Due to the magnetic effect, the reed of the ball level sensor is magnetically attracted to change the position of the liquid level into an electrical signal. The actual position of the liquid is displayed digitally by a display instrument. The floating ball level gauge achieves long-range detection and control of the liquid level.

Learn more on Wikipedia

A magnetic float switch is a magnet fixed in a floating ball in the middle. Put the magnetic float on a stainless steel rod. Place a magnetic element (usually a reed switch) inside a rusty steel rod. When the levitation ball moves on a stainless steel rod, the magnetic elements will attract and break.

The purpose of a float switch is to open or close a circuit as the level of a liquid rises or falls. Most float switches are “normally closed,” meaning the two wires coming from the top of the switch complete a circuit when the float is at its low point, resting on its bottom clip or stop (for example, when a tank is dry).
Most float switches utilize a magnetic reed switch to open or close the circuit. The reed is encased in a glass tube, which is cemented into a plastic or stainless steel stem with epoxy. The illustration to the left demonstrates how a magnet can be used to open or close a circuit by moving it closer to or farther away from a reed switch. When the magnet comes close to the two contacts, they draw together and touch, allowing current to pass through. When the magnet is moved away, the contacts demagnetize and separate, breaking the circuit.
In a float switch, the magnetic reed switch is hermetically sealed in a stem, most often made from plastic or stainless steel. The float encases a sealed magnet, which moves up and down the length of the stem as a fluid level rises and falls.
As the magnet passes by the contacts in the encased reed switch, they draw together and complete a circuit between the two lead wires, as shown in the cutaway to the left.
The operation shown can usually be reversed by removing the bottom clip from the switch, inverting the float and replacing the clip. When this change is made, the switch circuit will be open when the float is resting on the bottom clip and closed when the float rises.
Properly used, float switches can deliver millions of on/off cycles, for years of dependable operation. Failures are normally due to overloading, frequently caused by spiking voltage.

Liquid level switch, also known as water level switch, liquid level sensor. Liquid level switch is used to control the liquid level switch. It is mainly divided into contact type and non-contact type. Capacitive liquid level switches are commonly used in non-contact switches, and contact float type liquid level switches are most widely used. Electrode level switches, electronic level switches, and capacitive level switches can also be implemented using contact methods.

Technical Support

**Level Senors for Tank Level Measurement**

Magnetic float level sensor manufacturer

The float level sensor is a fully customized product. Different measurement needs will cause price changes. So before determining the price of the float level sensor, we need to confirm:
1. Junction box style

Connection method
Probe diameter
Float distance
Probe length
Material selection

Sino-Instrument is float level sensor manufacturer. On the premise of ensuring product quality, we offer you the best price.

Sino-Instrument offers over 10 level transmitters for level measurement.

About 50% of these are liquid level meters, 40% is the tank level sensor.

A wide variety of level meters options are available to you,

such as free samples, paid samples.

Sino-Instrument is a globally recognized supplier and manufacturer of level measurement instrumentation, located in China.

Request a Quote

Please enable JavaScript in your browser to submit the form

KimGuo11

drurylandetheatre.com

SI-U03 Float Switch Water Level Controller

Posted on February 14, 2020 by KimGuo11

Float Switch Water Level Controller for Continuous Liquid Level (interface) Measurement and Automatic Control. Explosion-proof and water proof.

SI-U03 Float Switch Water Level Controller

Float switches, also known as float level switches. Float Switch Water Level Controller is mechanical water level indicators that depend on moving parts to trigger a switch.

Float switch water level controller can be directly installed on various tank equipment (water tank). Float switch water level controller is especially suitable for hot heavy oil in oil refinery (temperature ≤500 ℃, pressure ≤4.0MPa). Viscous and dirty media, asphalt, grease and other oil products. As well as flammable, explosive, corrosive and other media’s Liquid level (interface) continuous measurement and automatic control.

Please feel free to contact us for Techinical Support, or Request a quote for float level sensors (customization available).

More Float Level Sensors

Float Switch Water Level Controller Features

It can be installed horizontally on the side wall of the barrel, or vertically on the top of the barrel;
The structure is simple and reasonable, the performance is stable and reliable, and the installation is convenient;
Both 220VAC and 24VDC circuits can be used;
The control part is completely isolated from the measured liquid medium, which can be applied to high temperature and high pressure environment;
A variety of materials (SUS304, SUS316, PP), a variety of connection methods can meet environmental needs;
Lightweight (compact type) and long working life.
Suitable for various tank installations.
Suitable for viscous dirty media;
Available in explosion proof and non-explosion proof

Specifications of SI-U03 Float Switch Water Level Controller

Type	SI-U03-A	SI-U03-B	SI-U03-C
Protection level	dIIBT4	dIIBT4	dIIBT4
Pressure	1.0 MPa	1.0 MPa	1.0 MPa
Tenperature(℃)	Normal：≤100℃ High Temperature：≤350℃
Net weight	1.5～2.0Kg
Switching difference(mm)	≤8	25～550	8～1000
Setting method	Not adjustable	Stepwise adjustable	Stepless adjustable
Installation form	Horizontal	Horizontal	Vertical
Power supply and contact capacity and life	AC：220V/1.5A、110V/2.5A DC：24V/2.5A、240V/0.5A Life：5×100^2

Know more about: Guide for Liquid level float switches

How to install float switch in water storage tank?

The flange of SI-U03 series electric float liquid level transmitter is installed on the side wall of the medium tank.
Before installation, it should be considered in combination with the structural characteristics of the transmitter. It is convenient to operate, observe and maintain to determine the installation position and direction. If the floating ball transmitter is installed on the left side of the flange, it is installed on the left side, otherwise it is installed on the right side.
Assume that the current state is the right installation. If you want to change to the left installation, use the HART Communicator to move or set the transmitter’s zero position and range.
And (PV range), follow the prompts on the HART communicator display to enter URV (upper range value). LRV (lower range value). And display USL (upper sensor limit)With LSL (Low Sensor Limit). Reset the lower range value corresponding to 4mA and the upper value corresponding to 20mA and send it. If other parameters are not changed, you can change to the left installation.
Floating ball and club installation: First, the floating ball and the club are tightened and welded. For the club installation operation of the new connection structure of SI-U03-A small-angle floating ball liquid level transmitter, the club is installed. Screw into the inner screw hole of the connecting rod at the end of the protective rod sleeve.
Pay attention to tighten the top wires on both sides of the connecting rod into the annular grooves on the club. And then tighten the lock nuts on the top wire. For SI-U03-B large-angle floating ball liquid level transmitter, screw the ball into the inner screw hole at the end of the swing arm. And then tighten the top wire and lock nut on it in the same way.
Note: “If the site conditions are poor, in order to prevent the floating ball, club, swing arm and other connecting parts from loosening. It is recommended to place the top wire and the lock nut on the joint and tighten the float and the club After welding directly to the coupling. “
The transmitter is directly installed on the flange of the side wall of the medium container under test through a flange. The requirements for the straight pipe section of the connection flange are as follows: SI-U03-A L ≤ 160mm;
The transmitter head is connected to the radiator through the connection plate. When installing, insert the spindle head into the coupling hole of the transmitter head, and the coupling should not be distorted. The meter head can be installed on the left or right side.
For correct installation, please refer to the indicator dial on the back of the transmitter case. If the transmitter is installed on the left, turn the end pointer behind the meter head to the “left 0” scale. If the transmitter is installed on the right side, turn the pointer on the back of the meter to the “right 0” scale line. And when the float is moved to the lowest measurement position, tighten the set screw of the coupling and the spindle.
Install the balance rod (mechanism) into the dental insert and square hole. Tighten the top wire to fix the balance rod. Loosen the shaft nut and adjust the dental insert to make the balance rod and the ball in the same plane. And put the axial head nut.
Tighten the position of the balance weight and adjust the balance weight to the optimal state to fix the balance weight. Note: “For liquids of different densities due to the different buoyancy forces experienced by the float, the balance can be adjusted. The position of the hammer on the balance bar to achieve the goal of normal measurement. “
In the process of adjusting the balance weight, when the feel is light, you can adjust the two M10 compression bolts of the waist-shaped compression sleeve inside the radiator to tighten the expansion force of the sealing gasket. Otherwise, you can adjust the waist-shaped compression sleeve when the feel is light Two M10 bolts loosen the expansion of the gasket until it does not leak!

How does a float switch water level controller work?

The float ball level switch structure is mainly designed and produced based on the principles of buoyancy and static magnetic fields. The position of the floating ball with a magnet (floating ball for short) in the measured medium is affected by buoyancy. The change of the liquid level causes the position of the magnetic float to change. The magnet in the float and the sensor (reed switch) function to generate a switching signal.

Similar to the principle of the float level sensor. But the float level sensor outputs a quasi-continuous electrical signal, while the float level switch outputs a discrete switching signal.

Water Tank Level Controller

Water level controller refers to the control of high and low water levels by mechanical or electronic methods. It can control solenoid valves, water pumps, etc., and become water level automatic controllers or water level alarms. To achieve semi-automation or full automation.

Commonly used water (liquid) level controllers include reed switch water level controllers, float magnetic switch liquid level controllers, electrode type water level controllers, pressure type water level controllers, etc.

Read more about: Types of water level controllers

Water Level Sensors for Water Tanks

Water level transducers are also called Water Level Sensors, or water level transmitters. Water level transducers are used to monitor water usage and quality. The water level signal is output through 4-20mA and other signals, which is convenient for people to monitor the water level.

There are many types of water level transducers. Common ones are input type, ultrasonic, radar and so on.

Sino-Inst offer a wide range of solutions with various pressure ranges, cable lengths and output options.

For remote monitoring and recording of water level data in groundwater pumping and sludge testing, stormwater flood analysis and runoff, and surface water irrigation canals, streams and river measurements.

Read more about: Types Of Water Level Sensors

Water Tank Level Control System

Water level control refers to the control of high and low water levels by mechanical or electronic methods. It can control solenoid valves, water pumps, etc. to become an automatic water level controller or water level alarm, thereby realizing semi-automation or full automation.

Water level control is generally used for high-level tank water supply and sump drainage. The device that converts the water level signal into an electrical signal to control the start and stop of the water pump is called a water (liquid) level controller. Commonly used water (liquid) level controllers include reed switch water level controllers, float magnetic switch liquid level controllers, electrode type water level controllers, pressure type water level controllers, etc.

Read more about: Water tank level sensor system

Generally, we can monitor the liquid level of the water tank remotely. You can choose wired or wireless remote monitoring.

Wired remote transmission, generally the output signal of the liquid level sensor. Such as 4-20mA, RS485 and so on. Through the signal line, the liquid level information can be displayed remotely.

Wireless remote transmission, generally a liquid level sensor through a wireless signal. The use of LORA debugging method and NB-IoT communication method can greatly increase the communication distance. It can be widely used in the field of short-distance Internet of Things wireless communication in various occasions. Real-time monitoring of on-site liquid level data, alarm processing, statistical analysis and other functions.

The appropriate remote water tank level sensor can be configured according to the actual needs of users.

Read more about: Wireless Level Sensor – LoRa

The principles of liquid level sensors may vary, and their applications vary widely. Electronic or mechanical, remote or on-site display, contact or non-contact, it’s dizzying.

In addition to the way of connecting the measured container to visually display the liquid level, the mechanical liquid level gauge is used. Another way to measure is to use the buoyancy of the liquid surface. So that the buoy or float can follow the change of the liquid level, which is converted into the display of the liquid level. These two methods are simple though. But very stable and reliable.

The biggest feature of the mechanical level gauge compared to its electronic level gauge is that the internal structure is very simple and the counting is intuitive. A variety of materials are available, which can achieve anti-corrosion and explosion-proof, and can adapt to various installation environments.

Magnetic flap level gauge, glass tube level gauge, glass plate level gauge, float level gauge, etc. These are the most widely used mechanical liquid level display instruments on the market. They are widely used in petroleum, metallurgy, chemical, paper and other industries.

What about electronic? Generally speaking, the ones that need power supply are basically electronic. Float, capacitive, radar, ultrasonic, remote magnetic flap including liquid level transmitter and so on.

It’s easy to tell them apart, whether it’s powered internally or externally, whether it’s 24V or 220V. In short, the electronic must be powered to work.

Unlike the mechanical type, the working principle of the electronic level gauge is varied. For example, the radar level gauge uses microwaves, the magnetostrictive level gauge uses current pulses, the static pressure type uses the pressure generated at the bottom of the measured medium, and the ultrasonic level gauge uses ultrasonic waves to measure the liquid level.

High precision, easy installation, and adaptability to various installation environments are the characteristics of electronic liquid level display instruments. Compared with the mechanical type, they have a higher level of technology, but at the same time, the price is much higher than the mechanical type.

External Tank Level Indicator refers to an externally mounted level sensor. It is used to install on the outside of the liquid storage tank to measure the liquid level of the tank. When measuring with External Tank Level Indicator, install the ultrasonic probe just below the outer wall (bottom) of the container under test. No need to cut holes, easy to install. Does not affect on-site production. It can realize accurate measurement of various toxic substances and various pure liquids in high temperature and high pressure airtight containers.

Frequently
Asked
Questions

Help Center

The Float water level sensor uses a float to track the rise and fall of the water level, and directly drives the record in a mechanical way. The use of the float water level sensor requires logging equipment (including the water inlet pipe), which is suitable for the low sandy river section with stable bank slope and little river bed erosion. The float water level sensor is widely used in China.

The price of the water level float switch is mainly determined by some parameters:
structure type;
Wetted material
Pressure Level;
Flange specifications
Explosion-proof type
temperature;
Measuring range;
Insertion length
Medium density
Other contents such as density, operating temperature, operating pressure, electrical interface, etc., must be specified in the specification so that we can use them as reference data when designing the output.

Water level float switch is generally used for high level water tank water supply and sewage tank drainage. The device that converts the water level signal into an electrical signal to control the start and stop of the pump is called a water (liquid) level controller. Common water (liquid) level controllers include:Reed switch water level controllers. Float magnetic switch liquid level controllers. Electrode type water level controllers. Pressure type water level controllers, etc.

Liquid level controller refers to the control of high and low liquid level by mechanical or electronic methods. It can control solenoid valves, water pumps, etc. to achieve semi-automatic or full automation. There are many methods, depending on the choice of different products different.

Extended reading: Capacitive water level sensor

Notes on installation and adjustment of float level switch:

Just make sure that the water level line of the thermal equipment is consistent during the installation. For example, the liquid level switch of SOR is usually attached to the water level line on the wall of the cylinder. We soak the switch in the water tank and slowly sink to make the water surface gradually approach the marking line. When you get closest, you will hear the micro switch the sound of.

Note that:
High-temperature liquid level switches, etc. have high operating temperatures and high water temperatures. The density of hot water is lower than the density of room temperature water, so the action line of room temperature water is lower than the switch marking line. Low level alarm is connected to normally closed (NC), high level is connected to normally open (NO). This type of switch is not difficult to install. The liquid level switch itself will have more than two pairs of micro-switches, which respectively output two pairs of normally open and two pairs of normally closed contacts, which are usually “on alarm” when applied.

Control the high and low water levels by mechanical or electronic methods. It can control solenoid valves, water pumps, etc. to become an automatic water level controller or a water level alarm, thereby realizing semi-automation or full automation.

Liquid level switch is a general term. There are many types of level switches. Such as ultrasonic liquid level switch, electrode liquid level switch, capacitive liquid level switch, etc. The float level switch is also one of them.

The float level switch is a controller used to control the detection and control of the water level.

The float level switch is a liquid level control part with a simple structure and convenient use. It has no complicated circuits and will not be disturbed. As long as the material is selected correctly, any liquid, pressure and temperature can be used.

Related Products

**Ultrasonic Oil Level Sensor-External Paste-Truck Fuel Tank**

**Portable Ultrasonic Liquid Level Indicator**

**HS-2000 Ultrasonic Tank Level Sensor-External Mounted**

**HS-ULC-Pro Ultrasonic Non-contact Liquid Level Controller**

**HS-ULC Ultrasonic Level Switch-External Mounted**

**Differential pressure(DP) level transmitter**

**SIRD-701 Guided Wave Radar Level Senso**

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Sino-Inst offers over 10 Float Switch Water Level Controllers for level measurement. About 50% of these are liquid Float Switch Water Level Controllers, 40% is the tank level sensor.

A wide variety of Float Switch Water Level Controllers options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of level measurement instrumentation, located in China.

Request a Quote

KimGuo11

drurylandetheatre.com

SI-U02 Multi Level Float Switch

Posted on February 13, 2020 by KimGuo11

Multi level float switch is also called multi point level switch. Support 1-4 liquid level measurement switch point customization.

Multi level float switch is a custom multi point float level sensor & switch. These versatile level switches are available in many materials. Like: Stainless Steel, Brass & Buna, PVC, Polypropylene or PTFE and can be ordered with an integrated temperature sensor. Use these multi-level float switches with a tank level alarm or liquid level control relay for a turnkey solution. Explosion-proof available.

Call us now to talk with a sales engineer or fill out our easy to use request for quote form by following the steps below.

More Float Level Sensors

Features of SI-U02 Multi Level Float Switch

Can be used for multi-point control. The position of the control switch can be customized according to user needs.
No power is required to use the reed switch, and the life of the contact can reach 2 million times.
All the switch outlets are in the same junction box, and the external construction wiring cost is low.
Compared with other types of liquid level switches with multiple switch control points, the RF unit has the lowest unit price.
The protection level of the junction box is above IP-65.
It is made of PP and SUS316 metal, so regardless of acid and alkali liquid, solvent or various fuels, there are suitable products for use.
The magnetic reed switch is completely isolated from the wires and liquid. So it can be used safely on high temperature and high voltage equipment.
Connecting rod type float level switch set, suitable for high temperature and high pressure occasions.
60VA dry contact reed switch, can choose normally open or normally closed by floating ball installation position.
316 SS float, conduit and mounting interface, suitable for harsh environment.
American standard (NEMA 4X) polypropylene housing with rotatable base for electrical centering adjustment.
Customizable catheter length and switch set point size.

Specifications of SI-U02 Multi Level Float Switch

PP and PVDF materials are suitable for strong acid and alkali places; SUS304 / 316 metal materials are suitable for high temperature and high pressure tank
The most complete specifications of the junction box, including plastic, aluminum alloy, stainless steel explosion-proof type, protection level IP-65 or higher
Contact capacity 50W / 250VAC SPST or 40W / 250VAC SPDT
Connection flanges have JIS, DIN, ANSI specifications; teeth have NPT, PF, BSP and other specifications
Multi-point control, easy installation and cost saving
Length: 7.6Cm to 2.4m
Accuracy: ± 3mm
Repeatability: ± 1mm
Specific gravity: minimum 0.55
Installation position: vertical installation ± 30 degrees
Switch set point: 1-5 (factory setting)
Contact type: SPST reed
Contact capacity: 240VAC / VDC @ 60VA
Electric shock output: normally open
Working temperature: -40 degrees to 200 degrees
Ambient temperature: -40 degrees to 60 degrees
Installation height: 13.2Cm
Pressure: 13.8bar
Protection level: IP65
Housing material: PP.UL94VO
Terminal strip: 12 posts, socket
Electrical interface: 1/2 ”NPT
Installation interface: 2 “NPT
Grade: Universal
Certification: CE
Special specifications can be customized according to customer needs

Extended reading: Ultrasonic Level Switch-External Mounted

SI-U02 Multi Level Float Switch Types

In order to adapt to different measuring liquids, customers can choose different wetted materials.

Types	Wetted material	Operating temperature	Working pressure
Standard type	Stainless steel 1Cr18Ni9Ti, 304SS, 316L	-30 ~ 120 ℃	≤2.5MPa
Anticorrosive	Polypropylene PP	-30 ~ 80 ℃	≤0.4MPa
Corrosion-resistant	Teflon PTFE/PVC	-30 ~ 160 ℃	≤1.0MPa

How does a float level switch work ?

The Multi-Point Liquid Level Float Switch operates magnetically, without mechanical connections. And it is simple and reliable.

When the floating ball switch measures the floating medium of the test medium, the float moves the main body. And at the same time, the magnet on the other end of the float will control the magnet on the switch operating lever.

Set one or more reed switches in a closed metal or plastic tube. And then pass the tube through one or more, hollow and floating ring with ring magnet inside. And use the fixed ring to control the floating ball and the magnetic spring.

The switch is in the relevant position, which makes the float float up and down within a certain range. The magnet in the float is used to attract the contacts of the reed switch, which generates the opening and closing action.

More about: Float level sensor working principle

Applications of Multi-Point Liquid Level Float Switch

The Multi-Point Liquid Level Float Switch is suitable for:Control the pump operation to maintain the liquid level. Control the automatic loading and unloading of the tank. Control the liquid level or supply signals. Such as oil tanks, automatic cleaning systems, hydraulic tanks, low-pressure boilers, sewage treatment systems.

Shipbuilding Industry
Generator Facilities
Petrochemical Industry
Food/Beverage Industry
Waste Water/Water Purified Facilities
Electronic Industry
Dyeing and Finishing Industry
Chemical Industry
Rubber/ Plastic Industry
Hydraulic.

SI-U02 Multi Level Float Switch Dimension

Installation Precautions

Multi-core cables are recommended for wiring. The load of the controlled line must match the contact capacity of the float switch.
The installation position should be far from the water inlet, otherwise the switch will cause malfunction due to the fluctuation of the water inlet.
If the switch device is on the wall of the container, an L-shaped steel bracket can be added.
When the float switch is used in a circuit with an inductive load such as a motor, relay, solenoid coil, etc., it is recommended to protect the circuit in parallel at both ends of the load such as: RC (buffer), rheostat, diode, etc.
After the wiring is completed, please tighten the box cover and fix the connection port to ensure the junction box is waterproof.
The identification numbers on the terminal block of the terminal board correspond to the contacts of the floating balls from top to bottom.

More Featured liquid Level Sensors and Switches

**SI-U05 Cable Float Level Sensor & Swtich**

LD series Rigid Probe Magnetostrictive Level Transmitter

LR series Integral flange Magnetostrictive level sensor

LT series Digital Display Magnetostrictive liquid level sensor

Sino-Inst offers over 10 level transmitters for level measurement.

About 50% of these are liquid level meters, 40% is the tank level sensor.

A wide variety of level meters options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of level measurement instrumentation, located in China.

Request a Quote

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KimGuo11

drurylandetheatre.com

SI-U01 Float Level Sensor

Posted on February 12, 2020 by KimGuo11

Float Level Sensors with Magnetic Reed Switches for Continuous Level Measurement.

Float level sensor (float switch) is one type continuous level sensor for industrial level measurement. Float level sensor has a magnetic float that rises and falls as liquid level changes. The percentage of the liquid level, 4 ~ 20mA current and liquid level value, can be displayed on site. Applications like: water tank, fuel tank, level measurement and level control. Vertical, horizontal, and side mounted, all can be satisfied.

Please feel free to contact us for Techinical Support, or Request a quote for float level sensors (customization available).

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Level Sensors

Description of SI-U01 Float Level Sensor

SI-U01 float level meter is composed of three parts: magnetic float, sensor and transmitter. When the magnetic float changes with the liquid level, it floats up and down along the duct. The magnetic steel inside the float attracts the reed switch at the corresponding position in the sensor. So that the total resistance (or voltage) of the sensor changes. The changed resistance (or voltage) signal is converted into a current signal of 4-20mA and output. And the upper and lower limit alarms can be set on the display to achieve the position control of the liquid level.

SI-U01 floating ball liquid level gauge consists of a liquid level sensor and an intelligent HART board (current converter). The floating ball and the liquid level change synchronously, and the reed switch is controlled to open and close. This makes the resistance in the sensor change linearly. The change of resistance is converted by the converter into 4 ~ 20mA standard current signal or superimposed HART digital signal output.

Float level sensor can also be used with paperless recorder.

Features of SI-U01 Continuous Float Level Sensor

Intelligent electronic components are composed of a motherboard and an LCD screen;
You can adjust the range and zero point by pressing the button on the spot;
It can use HART communicator or microcomputer to communicate with this smart meter on both sides without interrupting the output signal.
It is suitable for explosion-proof or inconvenient installation and disassembly of the meter. Instrument measurement, process parameters, equipment configuration, calibration, diagnostic information HART protocol access or change;
Two-way communication with the host in the distributed control system using the HART protocol;
With EEPROM, no data is lost due to power failure.
Simple working principle, wide applicability, safe, convenient and maintenance-free
Realize the connection measurement of the liquid level without being affected by the physical and chemical properties of the measured medium. Such as: temperature, pressure, conductivity, dielectric constant, etc.
The use of different materials can achieve the measurement of highly corrosive media
It can be used to measure the interface of two different density liquids.
Good repeatability.

Specifications of SI-U01 Float Level Sensor

Max insert depth	L=6m(>6m customize)
Max control scope	L-120mm
Min control scope	50mm(<50mm customize)
Medium density	>0.5g/cm3
Working pressure	PN2.5~ PN160(Max pressure PN320)
Working temperature	-40~80 °C, -40~120 °C, -40~150 °C (250°C customize )
Float diameter	D28~D120(depending on pressure and density)
Installation type	Flange: DN40~DN150 Flange standard: HG/T20592~2009 (pressure>PN25, Flange>DN125) G2” thread Other method (consulting)
Maximum switch frequency	<1×105
Inaccuracy	±8±2mm
Working power supply	220VAC/380VAC
Max voltage of switch	<250VAC
Max current of switch	5A
Installation angle	< ±25°
Wiring box	M20×1.5 female thread
IP grade	IP65
Explosion-proof grade	Exd II CT6Gb

Float Level Sensor Operating Principle

Float level meter is an instrument for measuring liquid level. It is widely used in the field of liquid measurement. Many industries will choose to use it for measurement equipment. Such as the petroleum, chemical, and pharmaceutical industries.

Float level sensor is designed and produced based on the principle of buoyancy and static magnetic field. The position of a floating ball with a magnet (floating ball for short) in the measured medium is affected by buoyancy.

The change of the liquid level causes the position of the magnetic float to change. The role of the magnet and sensor (reed switch) in the floating ball changes the number of components (such as fixed resistance) connected in series to the circuit.

Thereby changing the electrical quantity of the instrument circuit system. That is, changes in the position of the magnetic float cause changes in the electrical quantity. The change of the electrical quantity is detected to reflect the liquid level in the container.

The float level sensor is installed on the top of the container through a connection flange. The float ball floats on the liquid surface according to the principle of discharging the liquid volume phase and so on.

When the liquid level of the container changes, the float ball also moves up and down. The reed switch of the ball level gauge is magnetically attracted to change the position of the liquid level into an electrical signal.

The actual position of the liquid is displayed digitally by the display instrument. The floating ball level gauge can achieve long-range detection and control of the liquid level.

Applications of SI-U01 Float Level Sensor

Float level sensors provide reliable readings in a range of operating environments.

Float level sensor can be widely used for continuous measurement of the liquid level (boundary level): High temperature. High pressure. Viscous, dirty media. Asphalt, wax-containing oil products and flammable, explosive, corrosive media.

Float level sensor can be used for industrial level measurement and control of various liquid tanks. Such as: Petroleum, chemical raw material storage. Industrial processes, biochemicals, medicine, food and beverage. Tank farm management and underground storage at gas stations.

The float level sensor is also suitable for dam water level, reservoir water level monitoring and sewage treatment, etc.

Of course, for different applications, you can choose different materials.

Such as:

Plastic materials PP and PVDF, suitable for strong acid and alkali places;

The metal material is SUS304 / 316L, which is suitable for high temperature 200 ℃ and high pressure 64kg/cm2.

Float level sensor Advantages and Disadvantages

Advantages

Long life span, stable and reliable operation, easy installation, almost no maintenance
None influence of measured medium in physical and chemical state. Eg: medium electrical conductivity, dielectric constants, foam, pressure, temperature, evaporation, boiling, bubbling effect etc, .
Choose appropriate material can be used in a variety of bad media environment with densities ≥ 0.5G/CC ;
Interface measurement with two media of different density control;
Wide range of application. Pressures from vacuum to PN160 (special up to PN320), temperature -40~+150 ° c
Design, explosion-proof, suitable for explosive environments;
Controller can be used to control the upper and lower liquid level.

Disadvantages

Low accuracy.
The installation position is limited by the shape of the container.
Most float level gauges are not suitable for corrosive or hazardous liquid media.

Float level sensor for water tank & fuel tank

In water treatment, the water tank float level switch is directly related to the safety and reliability of the entire process.

In a process, there are different types such as intermediate water tank, backwash water tank, produced water tank and waste liquid tank.

The sizes of these boxes are different. The volume of the produced water and the original water tank may be larger. In these water tanks, the water tank float level switch is used for related control.

Different level switches will have different actions. However, it is not necessary to have several level switches in a large water tank.

In the water tank, there are high and low level switches. The high level switch can detect whether the water tank is full. If it is full, the water production will stop. The low level switch is used to detect the water tank Is the water sufficient? If it is not enough, no more water can be sent out.

Water tank float level switch is a working condition word. If it is a large water tank, other level gauges can also be used to solve it. Like radar level gauges, ultrasonic level gauges, etc.

Of course, our float level sensor can also be used to measure and control the level of the fuel tank.

If it is used in an oil tank, special conditions such as the type of oil and corrosiveness need to be considered.

If you need to measure the level of the fuel tank. Please contact Sino-Inst sales engineers, we will provide you with suitable products and quotations based on your actual measurement situation.

Float Level Sensor for tank liquid volume monitoring

Our Float level sensors can output liquid level signals, such as 4-20mA signal, 0-10V signal, RS485 and so on.

However, the float level transmitter alone cannot calculate the liquid volume of tanks of different sizes. It’s too complicated. A separate recorder is required to calculate it.

Therefore, the digital display volume meter can collect, display and convert the liquid level of various regular and irregular tanks in the industrial field into the corresponding tank volume. It is suitable for monitoring, controlling and collecting various process parameters.

SI-U01 Float Leve Sensor Installation

The main float level sensor installation methods are:

Top mounted; Bottom mounted; Side mounted

SI-U01 Float level sensor installation instructions:

The measured medium should not contain ferromagnetic impurities.
In order to prevent the floating ball from falling off or hitting the sealing tube at high speed during transportation, which will cause the measuring tape to come out.
The meter should be fixed to the bottom of the sealed tube with a clamp and the magnetic steel on top of the sealed tube before the instrument leaves the factory.
Before installing and using, the user should remove the clamp. Raise the floating ball to the top of the sealing tube. And then slowly move the floating ball down, and the needle should be rotated accordingly.
The indicator of the meter is pointer type, the indicator numbers are arranged in the direction of gel needles during full-scale measurement, and the indicators are arranged in the counter-clockwise direction during emptyness measurement.
The instrument is equipped with a mounting flange when it leaves the factory. The user should have a pipeline flange.
The installation position of the instrument is generally selected at half of the measuring range.

Float level sensor price

Connection method
Probe diameter
Float distance
Probe length
Material selection

Sino-Inst is float level sensor manufacturer. On the premise of ensuring product quality, we will offer you the best price.

Frequently Asked Questions

Float level sensor uses magnetic float as the measuring element. Through magnetic coupling, the internal resistance of the sensor changes linearly. The smart converter converts the resistance change into a 4-20mA standard current signal. It can display the percentage of liquid level, the current of 4 ~ 20mA and the value of liquid level. Remote transmission control room can realize automatic detection, control and recording of liquid level. This instrument is suitable for petroleum, chemical, power, light industry and pharmaceutical industries, such as sewage treatment and medium level measurement in various atmospheric and pressure vessels, especially for underground tanks and tanks.

Float level sensor is composed of float, plunger and so on. The float ball level gauge is mounted on the top of the container through a connecting flange. The float floats on the liquid surface according to the principle of discharging the liquid volume phase and so on. When the liquid level of the container changes, the float also moves up and down. Due to the magnetic effect, the reed of the float level gauge is magnetically attracted and changes the liquid level position into an electrical signal. The actual position of the liquid is displayed digitally by the display instrument. The float level gauge thus achieves long-range detection and control of the liquid surface.

Liquid level switch, also known as water level switch, liquid level sensor. As the name suggests, it is a switch used to control the liquid level. It is mainly divided into contact type and non-contact type. Capacitive liquid level switches are commonly used in non-contact switches, and contact float type liquid level switches are most widely used. Electrode level switches, electronic level switches, and capacitive level switches can also be implemented using contact methods.

More about:

Liquid level float switch technology|continuous-point level

1. Float level switch: The magnetic float of the float level switch rises or falls with the liquid level. So that the sensor detects the position of the reed switch chip in the tube, and sends a contact on / off switch signal. Because of its simple structure and economic benefits, it is widely used in the market, mainly for civilian use. But its stability is relatively poor compared to industrial-grade products.
2. Capacitive liquid level switch: After the probe is wetted, it detects the change in capacitance value and outputs a contact signal. Which has certain advantages in the measurement of slightly viscous media.
3. Electrode type liquid level switch: The electrode type liquid level switch uses the conductivity of the liquid to detect the level of the liquid. Once the measured medium touches the pole, it will conduct electricity and detect the signal. After the signal of the controller is amplified, a contact signal is output to realize the control of the liquid level.
4. The photoelectric liquid level switch: The photoelectric liquid level switch uses infrared detection, using the principle of refraction and reflection of light. The reflection or refraction of light at the interface between two different media. When the measured liquid is at a high level, the measured liquid and the photoelectric switch form an interface. When the measured liquid is at a low level, air and the photoelectric switch form another interface. These two interfaces make the photoelectric switch internal light. The intensity of the reflected light received by the receiving crystal is different, that is, it corresponds to two different switching states. Generally speaking, compared with other measuring instruments, the applicability of photoelectric switches is poor.

5. Tuning Fork Liquid Level Switch: It outputs a switch signal by detecting the change in the frequency and amplitude of the fork’s vibration, which is highly versatile. For the viscous working conditions, please consult with the manufacturer to determine the working conditions that are easy to crystallize.
6. Ultrasonic external liquid level switch: The instrument probe emits ultrasonic waves and detects its residual vibration signal in the container wall. When the liquid passes through the probe, the amplitude of this residual vibration signal will become smaller. This change is detected by the instrument After that, a switching signal is output. It is a non-contact type and is often used in high-risk situations where it is difficult to open holes on the site, but the cost is relatively expensive.
The above is an introduction to the types of common level switches in the market. For more information about level switches (level switch, level switch), level meters (level meter, level meter) and other level measuring instruments, please contact us.

Extended reading: Ultrasonic Level Switch-External Mounted

Float switch is a kind of special switch. Because it does not need power supply to provide power, it is a very simple pressure switch. Its volume is small, the material is stainless steel or plastic, and the working life is very long. It has been widely used in water treatment.
The advantage of the float switch is that it can accurately measure the water level of the liquid. So it is generally used in the liquid detection of normal pressure or pressured storage tanks for signal transmission, such as liquid level alarm. Strong. It can accept multi-point control, and its use position can be left to the customer. It does not need a power supply to ensure its environmental protection. Its life is about 2 million switches. No matter the price of the product itself or the installation cost are very affordable, the price is very high. High degree of protection. It can work under high temperature or high pressure conditions, and has high safety.

If you cannot find an answer to your question in our Float Level Sensor, you can always contact us and we will be with you shortly.

Contact Support

Technical Support

Many people may confuse the float level sensor with the magnetostrictive level sensor. Because they look alike. But the actual working principle is different.

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Sino-Ins is a manufacturer of Float Level Sensor. We provide more than 20 types of Float Level Sensors.

Float Level Sensor uses a magnetic floating ball as a measuring element. Through magnetic coupling, the internal resistance of the sensor changes linearly. The resistance change is converted into a 4~20mA standard current signal by an intelligent converter.

Float Level Sensor on-site liquid crystal display can display the percentage of liquid level, 4~20mA current and liquid level value on site. The remote supply control room can realize automatic detection, control and recording of liquid level.

Float Level Sensors can be widely used in the continuous measurement of high temperature, high pressure, viscous, dirty media, oil products such as asphalt, wax, and liquid levels (interfaces) of flammable, explosive, corrosive and other media.

Float Level Sensors can be used for liquid level industrial measurement and control of various liquid tanks such as petroleum, chemical raw material storage, industrial process, biochemical, pharmaceutical, food and beverage, tank farm management and underground storage of gas stations.

Float Level Sensors are also suitable for dam water level, reservoir water level monitoring and sewage treatment, etc.

Sino-Inst’s Float Level Sensors, made in China, have good quality, with better prices. Our Float Level Sensors are widely used in China, India, Pakistan, USA and other countries.

Sino-Inst’s entire team is well trained, so we can ensure that each customer’s needs are met. If you need any help with your product requirements, whether it is a Float Level Sensors, level sensors, or other equipment, please give us a call .

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KimGuo11

drurylandetheatre.com

The Secret of Ultrasonic Level Measurement

Posted on February 8, 2020 by KimGuo11

Ultrasonic level measurement is a contactless principle and is most suitable for level measurements of hot, corrosive, and boiling liquids.

Ultrasonic level measurement provides a Continuous level measurement in liquids and solids with ultrasonic level sensors。 Non-contact, and maintenance-free level measurement of fluids, pastes, sludges, and powdery to coarse bulk materials. The measurement is unaffected by dielectric constant, density, or humidity. And also unaffected by build-up due to the self-cleaning effect of the sensors.

RFQ More Ultrasonic Sensor

If you need to measure liquid levels, an ultrasonic level sensor is a good choice.

In the article “Level Senors for Tank Level Measurement“, we introduced a variety of level sensors that can be used to measure the tank level. Here, we will introduce the ultrasonic level sensor in detail.

Featured Sensors for Ultrasonic Level Measurement:

**ULT-200A Ultrasonic fuel tank level sensor**

Features of Ultrasonic liquid level sensors

Ultrasonic liquid level sensors are non-contact level measurement devices. In the measurement, the ultrasonic pulse is sent by the sensor (transducer). The sound wave is reflected by the liquid surface and received by the same sensor or ultrasonic receiver. It is converted into an electrical signal by a piezoelectric crystal or a magnetostrictive device. It is transmitted and received by the sound wave. The time between the sensor and the surface of the liquid is measured. Due to non-contact measurement, the measured medium is almost unlimited. It can be widely used for measuring the height of various liquid and solid materials. Like: water level, fuel level, oil level, petrol tank level, and so on.

Accurate and reliable sensing method
Ultrasonic level sensor technology is ideal for difficult fluids where contact with the media is not desirable
An ultrasonic liquid level transmitter is ideally sized and priced for most applications
Easy to install– simple to use
There are no moving parts
Temperature-compensated signal for improved accuracy
Self-cleaning sensor face
Unaffected by the target material’s color, shape or physical composition
Bench- or field-calibrated through communications with a PC or a push button on the sensor
Non-contact measurement, high performance, low cost, maintenance-free, high precision, long life；
Intelligent signal processing technology, the instrument adapts to various working conditions；
Two-wire system, three-wire system, isolated four-wire system
24VDC, 220VAC power supply optional
Over-voltage, over-current, lightning protection
Photoelectric isolation 4-20mA current output

Extended Reading: How to Measure Volume of Liquid

Advantages of Ultrasonic Level Transmitter

No media contact for vertically mounted type, so flexibility for use on different corrosive media, thick fluids, slurries, wastewater
Ultrasonic level transmitter has no moving parts. And it can measure level without making physical contact with the object.
High temperature fluid compatibility for vertically mounted types, since no sensitive components make contact with the fluid
High accuracy due to high frequency pulse wave and precise transit time time measurement
The accuracy of the reading remains unaffected even after changes in the chemical composition or the dielectric constant of the materials in the process fluids.
Operates with conductive or non-conductive fluids
Sealed pressurised vessel will not affect performance
Shorter blocking distance than radar
Useful for measuring levels in tanks with corrosive, boiling and hazardous chemicals.

Disadvantages of Ultrasonic Level Transmitter

Foaming, splashing, vapour and humidity can affect measurement performance
High cost compared to other technologies
Minimal blocking distance limits operation when in proximity to liquid level
Temperature compensation required to compensate for speed of sound variation with air temperature
Sound waves cannot be transmitted through a vacuum
Shorter range than radar.
It is not so convenient if the tank depth is high or the echo is absorbed or dispersed.
The object should not be sound absorbing type.
It is also unsuitable for tanks with too much smoke or high density moisture.

More about The Difference Between Ultrasonic Depth Sensor And Ultrasonic Level Sensor.

Extended reading: Guide to Ultrasonic Level Transmitters

What Is the Principle of Ultrasonic Level Measurement ?

Ultrasonic waves detect an object in the same way as Radar does it. Ultrasonic uses sound waves, and Radar uses radio waves. When the ultrasonic pulse signal is targeted towards an object, it is reflected by the object, and the echo returns to the sender.

The time traveled by the ultrasonic pulse is calculated, and the distance of the object is found.

Bats use a well-known method to measure the distance while traveling.

The ultrasonic level measurement principle is also used to find out fish positions in the ocean, locate submarines below water level, also the position of a scuba diver in the sea.

We will refer to Fig-1 and make an effort to understand the technicalities of the ultrasonic level transmitter.

An ultrasonic level transmitter is fixed at the top of a tank half filled with liquid.

The reference level for all measurements is the bottom of the tank.

The level to be detected is marked as “C”, and “B” is the distance of the ultrasonic sensor from the liquid level.

Ultrasonic pulse signals are transmitted from the transmitter, and it is reflected back to the sensor.

The travel time of the ultrasonic pulse from the sensor to the target and back is calculated.

Level “C” can be found by multiplying half of this time with the speed of sound in the air.

The measuring unit’s final result can be centimeters, feet, inches, etc.

Level = Speed of sound in air x Time delay / 2

Tip	You can see our range of Ultrasonic Level Transmitters here.

Practical System Design Problems of Ultrasonic Level Transmitter:

The above principle of measurement looks quite straightforward and true only in theory.

In practice, there are some technical difficulties that are to be taken care of to get the correct level of reading.

The velocity of sound changes due to the variation of air temperature.
- An integrated temperature sensor is used to compensate for changes in the velocity of sound due to temperature variations.
There are some interference echoes developed by the edges, welded joints, etc.
- This is taken care of by the software of the transmitter and called interference echo suppression.
Calibration of the transmitter is crucial.
- Accuracy of measurement depends on the accuracy of the calibration.
- The Empty distance “A” and measurement span “D” is to be ascertained correctly for inclusion in the calibration of the transmitter.
The transient characteristics of the sensor will develop a Blocking distance as shown in Fig-1. Span “D” should never extend to the blocking distance.

The Basic Structure of an Ultrasonic Transducer:

An ultrasonic sensor is the heart of the ultrasonic level Transmitter instrument.

This sensor will translate electrical energy into ultrasound waves.

Piezoelectric crystals are used for this conversion process.

Piezoelectric crystals will oscillate at high frequencies when electric energy is applied to it.

The reverse is also true.

These piezoelectric crystals will generate electrical signals on receipt of ultrasound.

These sensors are capable of sending ultrasound to an object and receiving the echo developed by the object.

The echo is converted into electrical energy for onward processing by the control circuit.

Extended reading: GWR Corrosive Liquid Chemical Level Sensor

Functional Block Diagram of a Typical Ultrasonic Level Transmitter:

We will refer to Fig-3 Functional Block Diagram to clarify the physical structures of an Ultrasonic Level Transmitter.

A micro-controller-based Control Circuit monitors all the activities of the ultrasonic level transmitter.

There are two Pulse Transmission Circuits, one for transmitter pulse and the other one for receiver pulse.

The pulse generated by the transmitter pulse is converted to Ultrasound pulses, by the Ultrasonic Sensor(Transmitter) and targeted towards the object.

This ultrasound pulse is reflected back as an echo pulse to the Ultrasonic Sensor (Receiver). The receiver converts this Ultrasonic pulse to an electrical signal pulse through the pulse generator.

The time elapsed, or the reflection time is measured by the counter. This elapsed time has relation to the level to be measured. This elapsed time is converted to level by the Control Circuit. There is a Timing Generator Circuit which is used to synchronize all functions, in the ultrasonic level measurement system.

The level is finally converted to a 4-20mA signal. 4mA is 0% level, and 20mA is the 100% level (see Fig-1).

This 4-20mA output signal carrying the level data can be transmitted to long distance to Process Control Instruments.

Functional Block Diagram for clarify physical structures of an Ultrasonic Level Transmitter.

Common Applications for Ultrasonic Liquid Level Sensors

Ultrasonic liquid level sensors are used for liquid level, solid material level, the tank body, and open channel flow. Their performance is very good. Ultrasonic level sensors are also ideal for applications where continuous level measurement is required.

The most popular application of ultrasonic level sensors is to measure the level of liquid in tanks, wells, pits or lakes.If the container is linear, extrapolating the volume measurement is easy. In a non-linear container, a strapping table is usually used to adjust the reading to a certain volume as the level increases and decreases. Most of our ultrasounds are specifically designed for level measurement.Find the right sensor for you. Since ultrasonic sensors work without the need to touch the medium, they are ideal for difficult or corrosive liquids. Such as acids, wastewater, and others.

Typical Media:

Acids
Wastewater
Inks and Paints
Slurries
Food and Beverage
Semiconductor Process Chemicals
Oils and Petroleum Distillates

Another very popular application of ultrasonic sensors is solid level detection. The trick is actually to use a sensor with twice the required distance. This gives you a stronger signal, which in turn provides a better echo for the sensor’s measurements. You may also need to tilt the sensor mount so that it is perpendicular to the angle of repose.
Measuring solids has always been difficult. But ultrasound will still be the main condition for continuous non-contact measurement.

Open channels are the main means of transporting, filtering, and metering water. Open channel flow monitoring is used in water treatment plants, environmental monitoring, and irrigation canals. Ultrasonic sensors are an excellent choice for open channel flow.

Extended reading: Case Study: Automatic Sludge Blanket Level Detector

Liquid Level Measurement with Ultrasonic Sensors

Tank level sensor

Ultrasonic level sensor wastewater

The ultrasonic level gauge is widely used in water level meter measurement projects in: Water plants. Wastewater treatment plants. Chemical reagent plants. Dye factories. Pulp mills and other factories. And is one of the main level measurement methods in modern intelligent automation industry. Ultrasonic technology has been used in the wastewater industry for more than 30 years for its high cost performance. Level gauges are widely used in industrial wastewater treatment plants and municipal wastewater treatment plants. Ultrasonic level gauges have the most applications, but their installation and measurement are limited by space.

In addition, since the propagation time of sound waves is affected by temperature, the ultrasonic sensor must be equipped with a temperature sensor. Ultrasonic level gauges are more accurate when used indoors or at groundwater levels.

Outdoors, the ultrasonic sensor generates heat due to sunlight. This will lead to inaccurate compensation for the propagation time of the sound waves, which will cause measurement errors. In chemical plants, there are a lot of high-concentration gases over chemical liquids, which will also change the propagation time of sound waves and even absorb sound waves. The shortest distance that an ultrasonic sensor can measure is usually 10-50cm. When installing, consider the “blind zone” that cannot be measured.

Extended reading: Radar Liquid Level Sensor|Corrosive, steam, volatile liquids

Ultrasonic Level Sensor for Solids

Liquid level and material level measurement is a problem often encountered in the industry. Ultrasonic positioning technology has many advantages. It can not only locate and continuously locate but also conveniently provide the signals required by telemetry or remote control. Compared with radioactive positioning technology, ultrasonic technology does not require protection. Compared with laser-ranging technology, it has the advantages of simplicity and economy. At the same time, ultrasonic technology generally does not require moving parts, so it is relatively convenient to install and maintain. .The ultrasonic level meter can be widely used in: Petroleum, mining, power plants. Chemical plants, water treatment plants. Sewage treatment stations. Agricultural water. Environmental monitoring. Food (wine industry, beverage industry, additives, edible oil, dairy products). Flood resistance Flood control, hydrological monitoring. Open channels, spatial positioning, and many other industries. There are two main installation methods for ultrasonic level gauges, one is top installation and the other is bottom installation. The ultrasonic level gauge also uses liquid sound guidance. The ultrasonic probe is installed outside the bottom of the tank. The measuring liquid is transmitted to the liquid surface and then reflected back to the probe. The propagation time is directly proportional to the level of the liquid.

Common Questions for Level Measurement Applications:

What type of tank sensor is right for your application?
Do Ultrasonic sensors work well outside?
Do you have any for Hazardous locations?
What is ultrasonic level sensor?
Can ultrasonic sensor detect water level?
How do ultrasonic liquid level sensors work?

Sino-Inst offers a variety of tank level measurement solutions. If you have any questions, please contact our sales engineers. CONTACT US

**SI-PCM261 Submersible Pressure Transducer**

**Magnetostrictive level transmitter with Local Digital Display**

Sino-Inst’s Tank level sensors easily handle these liquids. Rugged construction. Corrosion resistant materials. A wide environmental operating range and a liquid-tight IP68 ingress rating make them ideal for indoor and outdoor use. Even in salt water and hydrogen sulfide (H2S) environments.
Products are offered in a variety of distance ranges to accommodate tanks. Ranging from 6 in (15 cm) to 50 feet (15.2m), with various mounting threads and accessories available.

More

Ultrasonic level gauges work well outdoors. But we also need to protect the ultrasonic level gauge.

Ultrasonic level gauge outdoor requirements:
     1. It is recommended to install a sun visor to extend the service life of the meter.
     2. Wire and cable protection pipes should be sealed to prevent water accumulation.
     3. Although the instrument has its own lightning protection device, it is recommended to install a special lightning protection device at the inlet and outlet of the instrument when the instrument is used in a lightning-resistant area.
     4. The instrument is used in particularly hot and cold places, that is, when the ambient temperature may exceed the working requirements of the instrument, it is recommended to add high and low temperature devices around the level gauge.

Yes, Sino-Inst offer explosion-proof ultrasonic level sensors for Hazardous locations.

Explosion-proof ultrasonic level gauge has built-in temperature compensation, self-adaptive power. And can have signal processing technology, which improves the measurement accuracy of the instrument. It has obvious suppression function for interference echo. The explosion-proof ultrasonic level gauge uses a metal-aluminum alloy die-casting housing. Which has a beautiful appearance and good protection ability. The instrument uses industrial isolated power supply. And all input and output lines have lightning protection, overvoltage, and overcurrent protection circuits.Explosion-proof ultrasonic level gauge is suitable for measuring corrosive mud or sewage, hydrochloric acid, sulfuric acid, hydroxide and other corrosive media. Ultrasonic level gauge can be applied to process tanks, daily tanks, pools, etc. The position meter is mainly used in oilfield, chemical, power, metallurgy and other industries.

Ultrasonic level sensor is a digital level instrument controlled by a microprocessor. In the measurement, the pulsed ultrasonic wave is sent by the sensor (transducer). And the sound wave is reflected by the surface of the object and received by the same sensor, which is converted into an electrical signal. The distance between the sensor and the measured object is calculated from the time between the transmission and reception of the sound wave. Due to non-contact measurement, the measured medium is almost unlimited. And it can be widely used for measuring the height of various liquid and solid materials.

Sure. Ultrasonic liquid level sensors can detect water level. Like wastewater, in tank, in river.

Guide to Ultrasonic Level Transmitters-for Continuous Non Contact Level Measurement of Liquid & Solids.

Sino-Instrument offers over 10 level transmitters for level measurement.

About 50% of these are liquid level meters,

40% is the tank level sensor.

A wide variety of level meters options are available to you,

such as free samples, paid samples.

Sino-Instrument is a globally recognized supplier and manufacturer of level measurement instrumentation, located in China.

Request a Quote

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KimGuo11

drurylandetheatre.com

7 Type Tank Level Senors For Liquid and Solid

Posted on February 4, 2020 by KimGuo11

Sino-Inst produces many types of tank level sensors. Whatever your media, tank depth, and profile, Sino-Inst can always provide you with the right tank level sensors.

Tank Level Senors are also called Tank level indicators, tank level gauge, tank level meters, or tank level transmitters. Specifically refer to a type of sensor that can be used to measure tank level. The measured medium can be liquid or solid powder. Such as water, hydrochloric acid, Fuel, Diesel, Gasoline, liquefied gas, liquid ammonia, flour, cement, etc.

RFQ

Featured Tanks Level Sensors

Tank Level Sensors Types:

Ultrasonic fuel tank level sensor, also called non-contact fuel meter. Ultrasonic level sensor measure continuous liquid level, fluid level, or oil level.

Ultrasonic level sensors measure the distance between the transducer and the surface. Using the time required for an ultrasound pulse to travel from a transducer to the fluid surface and back (TOF). These sensors use frequencies in the tens of kilohertz range; transit times are ~6 ms/m. The speed of sound (340 m/s in air at 15 degrees C, 1115 fps at 60 degrees F) depends on the mixture of gases in the headspace and their temperature.

Ultrasonic sensors work without the need to touch the medium being measured. Ultrasonic sensors are ideal for difficult or corrosive liquids such as acids, wastewater, and others. Ultrasonic level sensors are also ideal for continuous level measurement. While float switches and other sensors are adept at measuring when liquid levels are above or below a certain point. The nature of ultrasonic level measurement is such that levels can be sensed and displayed in real-time.

More about Ultrasonic level measurement

Features of Ultrasonic Tank Level Sensor：

Non-contact – nothing touches the liquid
Easy to install at the top of the tank into standard fittings
Use indoors or outside, in metal or plastic tanks
Connects to other industrial equipment
Measures a wide variety of liquids and liquid environments
Accessories to display, alarm, and control liquid levels
Wireless option sends tank levels to a LAN or the cloud
MRO & OEM tank setup duplication without re-calibration

Magnetostrictive level transmitter, in-tank liquid level transmitter, is a continuous magnetic level gauge. The magnetostrictive level sensor measure the level of fluid in the vessel. By detecting the level of the magnets contained within the float and then transmits the measurement back to the control system.

Magnetostrictive liquid level transmitter is a kind of liquid level sensor. But it uses the principle of magnetostrictive operation internally. And combines modern electronic technology to measure the time value between pulse waves to achieve the purpose of accurately measuring the liquid level . The magnetostrictive liquid level meter works with waveguide pulses. During the work, the measured displacement is determined by measuring the time of the start pulse and the end pulse, so the measurement accuracy is high.

Features of Magnetostrictive Level Transmitters:

High Accuracy
High Reliability
No calibration required
No Maintenance
Simultaneous Measurement of Multiple Process Conditions:
-Product Level
-Interface Level
-Temperature
-Volume
No Scheduled Maintenance or Recalibration
Field Repairable
Inherent Accuracy ±0.039” (±1 mm)
200 Point Strap Table
API Temperature Corrected Volumes
Integral Display
Hazardous Area Certified
Intrinsically Safe

More about Magnetostrictive liquid level tmeasurement

Submersible level sensor, Pressure and DP level transmitter are all hydrostatic measurement devices.

Also known as pressure level transmitters, these transmitters help in determining fluid contents of a container, by measuring the pressure of the resting body of the fluid within it. The greater the force of liquid, the greater the volume of fluid.

Extended reading: Hydrostatic Level Measurement

The pressure type liquid level gauge is a pressure sensor that measures the liquid level. Including static pressure level gauge, liquid level transmitter, pressure transmitter and so on. The measured static pressure of a liquid is proportional to the height of the liquid. And the static pressure is converted into an electrical signal. After temperature compensation and linear correction, it is converted into a standard electrical signal (4-20mA / 1 ～ 5VDC). Hydrostatic liquid level sensor is suitable for liquid level measurement of various media in systems and industries. Such as petrochemical, pharmaceutical, water supply and drainage, environmental protection and other systems. The exquisite structure, simple adjustment and flexible installation methods provide convenience to use.

The differential pressure level gauge is a meter that calculates the liquid level (differential pressure) in a tank. By measuring the pressure difference at two different points of the container. For example, a 500 mm water column corresponds to a pressure of 500 mmH20. In many applications, however, there is additional vapor pressure above the liquid. Vapor pressure is not part of the level measurement. So impulse tubes and capillaries with seals are needed to counteract its presence.Capillary columns and sealing systems solve many installation problems with impulse tubes. These systems include an external sensing diaphragm. This diaphgram connected to a differential pressure transmitter via an oil-filled capillary column. The change in pressure causes a displacement of the diaphragm. So that the pressure is transmitted to the transmitter through the oil-filled capillary. The oil-filled capillary system is carefully welded and manufactured. So it is a reliable sealing system. This type of structure eliminates leak points and blockages that may occur in the impulse tube.

More about Hydrostatic pressure level measurement

Radar level transmitter, also called Radar level gauge. Non-contact Continuous level measurement in liquids and solids with free space radar sensors. Non-contacting radar, based on microwave technology, detects only surfaces that reflect energy. These transmitters work on the principle of a radar by using radio wave emissions. Mounted at the top of a tank filled with a liquid. The transmitter sends a radar signal into the liquid, and receives a reflection of the signal. The transmitters then analyze the current fill level of the tank based on the time taken by the transmitted signal to return.

Operating Principle of Non-Contacting Radar Level Sensors/Gauges (Unguided Wave)

Extended reading: Radar Liquid Level Sensor|Corrosive, steam, volatile liquids

Radar Level Sensor Features

Non-contact, continuous level measurement over larger ranges
Unaffected by sludge and biomass, dust, foam, oil, grease and other coatings, uneven surfaces, turbulence, pressure, and vacuum
Single frequency radar level sensors for liquid sensing, dual frequency radar level sensors for level measurement of aggregates, gravel, sand, coal, asphalt, and other solids
Simple mounting and push-button calibration

More about Radar level measurement

Capacitance level detectors, also known as Capacitance level transmitter. RF Capacitance Level Transmitter offers continuous and point level detection. In liquids and solids with capacitance probes. These transmitters use liquid stored in a tank or container as a dielectric medium between two or more electrodes. The energy capacity of the capacitor circuit increases when there is more liquid, and decreases if there is less liquid. Measuring the variations in the capacitance value, capacitance level transmitters calculate level of the tank.

Features of SI700 RF capacitance level transmitter:

Capacitive level measurement enables measurement without blind spots over the entire sensor length
Fully insulated capacitive sensors also measure aggressive liquids
Cost-effective measurement for trouble-free and maintenance-free operation

More about capacitance level measurement

These gauges are the preferred replacement for the sight glasses. They are similar to float devices, but they communicate the liquid surface location magnetically. The float, carrying a set of strong permanent magnets, rides in an auxiliary column (float chamber) attached to the vessel by means of two process connections. This column confines the float laterally so that it is always close to the chamber’s side wall. As the float rides up and down the fluid level a magnetized shuttle or bar graph indication moves with it. Showing the position of the float and thereby providing the level indication. The system can work only if the auxiliary column and chamber walls are made of non-magnetic material.

Sino-Inst provides float designs optimized for the specific gravity of the fluid being measured. Whether butane, propane, oil, acid, water, or interfaces between two fluids, as well as a large selection of float materials. This means the gauges can handle high temperatures, high pressures and corrosives fluids. Oversized float chambers and high-buoyancy floats are available for applications where buildup is anticipated.

Chambers, flanges and process connections can be made from engineered plastics. such as Kynar or exotic alloys such as Hastelloy C-276. Special chamber configurations can handle extreme conditions. Such as steam jacketing for liquid asphalt, oversized chambers for flashing applications, temperature designs for liquid nitrogen and refrigerants. Numerous metals and alloys ( titanium, Incoloy and Monel ) are available for varying combinations. Like high-temperature, high-pressure, low-specific-gravity and corrosive-fluid applications. Magnetic level gauges can also be outfitted with magnetostrictive and guided-wave radar transmitters. This allow the gauge’s local indication to be converted into 4-20 mA outputs and digital communication. That can be sent to a controller or control system.

Float level gauge is mainly composed of magnetic float, sensor and transmitter. When the magnetic float ball changes with the liquid level and floats up and down along the catheter. The magnetic steel in the float ball attracts the reed switch at the corresponding position in the sensor. Which changes the total resistance (or voltage) of the sensor. The transmitter then converts the changed resistance (or voltage) signal into a 4-20mA current signal output.
The float ball level gauge uses a magnetic float ball as a measuring element. Which makes the resistance in the sensor change linearly through magnetic coupling. The smart converter converts the resistance change into a 4-20mA standard current signal. It can display the percentage of liquid level, the current of 4 ~ 20mA and the value of liquid level. Remote transmission control room can realize automatic detection, control and recording of liquid level. The instrument is suitable for the sewage treatment of petroleum, chemical, power, light industry and pharmaceutical industries. And the measurement of the medium level in various atmospheric and pressure vessels. It is especially ideal for the liquid level measurement of underground storage tanks and storage tanks.

Features of Float level transmitters:

Suitable for the measurement of the liquid level and interface of the liquid medium in the container. In addition to on-site instructions, it can be equipped with remote transmitters, alarm switches and complete detection functions.
Innovative indication, intuitive reading, eye-catching, observing the direction of the indicator can be according to user needsChange the angle.
Large measuring range, not limited by the height of the storage tank.
The indicating mechanism is completely isolated from the measured medium, with good sealing, high reliability and safe use.
Simple structure, easy installation, easy maintenance, corrosion resistance, no power supply required, explosion-proof. At the lower limit, the float floats upright on the water.

Extended reading: Diesel fuel tank level gauges & indicators

After understanding these 7 types of Tank Level Senors, if you are experienced, you can purchase Tank Level Senors on the product details page. If you are new to this, then perhaps you need to continue to consider the measurement medium and monitoring requirements.

The following content is based on our many years of experience in liquid level measurement services. We at Sino-Inst have long been providing users with various tank level measurement solutions.

First, we recommend that you consider the measuring medium. For example, the most common measurement is the liquid level of water and diesel.

Water Tank Level Sensor

The water level sensor of your water tank is an essential component. If not repaired or replaced, a sensor can become damaged over time and fail entirely. Too much water can cause a malfunction and too little water means inadequate water pressure. Either way, repairing or replacing holding tanks is an expensive task you shouldn’t have to undertake because of sub-par sensors.
With Sino-Inst’s water tank level sensors, there’s nothing to break down or rust and our models have a 99% success rate!

In the high unlikely event that you experience any issues with your product, call us and we’ll replace or repair it immediately at no charge.

Hydrostatic pressure for Water level measurement

SMT3151TR Hydrostatic level transmitter-Rod Type

Extended reading: Hydrostatic Pressure Transmitter

Diesel storage tanks -Explosion Proof level sensors

For diesel, gasoline, or other oils that require explosion-proof storage tanks. Liquid level measurement requires level sensors to meet explosion-proof requirements.

For example, explosion-proof ultrasonic level meter, explosion-proof radar level meter, etc.

non-contact tank level sensors

**ULT-100 Explosion-proof** **Ultrasonic Level Indicator**

**Radar Water Level Sensor 0.05m～35m ~70m~120m**

Of course, there are many cases where we need to measure chemical liquids, such as hydrochloric acid, liquid ammonia, etc.

Chemical Tank Level Measurement

Sino-Inst Tank level sensors expand the range of environments in which our sensors operate. Some common chemicals can damage or corrode sensor materials, even 316 stainless steel. Transducer elements and bonding adhesives are also susceptible. Our tank level sensors avoid these problems by using a continuous injection molded housing of Polyvinylidene fluoride (PVDF), a highly non-reactive thermoplastic that resists solvents, acids and hydrocarbons.

Tank level sensors have both top and bottom mounting threads and include a potted-in, PUR-jacketed, UV resistant cable. Verify your chemicals and operating temperatures with this compatibility chart. All ToughSonic sensors include analog, switch and data interfaces and compatible setup software, included at no charge.

Extended reading: Corrosive Liquid Chemical Level Sensor in Chemical Processing

Read more about: Ultrasonic Tank Level Sensors for Tank Level Monitoring

OK. Once you know your measuring medium. Then you need to identify your monitoring needs. For example, you need to transmit the liquid level signal to the PLC system through 4-20mA.

All tank level sensors mentioned in this article can output 4-20mA.

The 4-20 mA current loop is the prevailing process control signal in many industries.It is an ideal method of transferring process information. Because the current does not change as it travels from the transmitter to receiver. It is also much simpler and cost-effective.However, voltage drops and the number of process variables,that need to be monitored can impact its cost and complexity.By knowing these fundamentals you will be able to make more informed decisions about process control in your facility. Which could affect your bottom line.

Extended reading: Industrial Tank level indicators and Tank Level Gauges

An analog signal refers to information represented by a continuously changing physical quantity. The amplitude, frequency, or phase of the signal changes continuously over time, or the characteristic amount of the representative information can be presented at any instant as a continuous time interval. Any value signal.

Sino-Inst’s tank level gauge provides multiple output modes, including analog voltage and current, digital, RS485, etc. The output signal can provide a position, multiple positions, or a position plus a temperature output. The detailed multi-function output mode provides customers with more choices.

Extended Reading: How to Measure Volume of Liquid

Continuous level sensors provide level monitoring of an entire system. They measure liquid level in a range, rather than at a single point, outputting an analog signal that correlates to the liquid level inside your tank or vessel.

Extended reading: What is a capacitive liquid level sensor?

If you do not have a monitoring system similar to a PLC, but you need to monitor the tank level in the office, you can configure our level-volume recorder.

Extended reading: GWR Solid Level Sensor-Cement silo-Ash powder measure

Featured Continuous level sensors

Tank Level Sensor Industries & Applications

Continuous level transmitters are versatile in monitoring liquid level needs. They can monitor water, diesel, lube oils and fuels, as well as various chemical and petrochemical liquids.

Storage tanks are widely used in the fluid industry to store raw materials, finished products, and intermediate products. They have an irreplaceable role in ensuring the safe production of equipment, energy-saving and emission reduction and improving the overall management level. National strategic reserves are also inseparable from various types of Storage tanks.

Industrial storage tanks are generally steel storage tanks. Carbon steel, low-temperature steel, stainless steel, and other materials are selected according to the characteristics of the storage medium, storage temperature, pressure, and other parameters. Other materials such as FRP and plastic are not considered due to fire and pressure resistance.

Common liquid level sensor application tank level monitoring:

Chemical injection
Hydraulic and lube oil tanks
Drilling fluid (mud) tank monitoring
Liquid level monitoring during transfer
Food and Beverage
HVAC
Medical
Printing (Ink Handling Systems)
Off-Highway Vehicles
Semiconductor

Extended reading: Types of Fuel-Diesel Level Sensors

How Tank Level Sensors Work?

The level of the liquid medium in the container is called the liquid level. And the instrument that measures the liquid level is called the liquid level transmitter. Level transmitter is a kind of level instrument.

There are two types of level transmitters, one is continuous and the other is point-off. The continuous level transmitter is a real-time monitor of the height of the liquid in the container. The point type, which generally takes two points, high and low, and outputs an alarm signal when the medium in the container reaches these two points. The types of liquid level transmitters are very wide. Specific include magnetic flap liquid level gauge, tuning fork vibration type, differential pressure type, pressure type. Ultrasonic, magnetostrictive liquid level gauge, magnetic flap, radar, and so on.

Levels of media such as: water, viscous fluids, and fuels, or dry media such as bulk solids and powders can be measured using the transmitter.

Level measurement transmitters are used in a myriad of applications that require level measurement within containers or tanks. These transmitters often find their application in material handling, food and beverage, power, chemical, and water treatment industries.

Magnetostrictive Level Sensor in Storage Tank Level Measurement

Level Transmitters

About Level Sensor Types and how they work, OMEGA Engineering has a good explanation. Video source

Technical Support

Top 5 Ultrasonic Level Sensor Applications

Ultrasonic level sensor applications are across a wide range of industries, from water and wastewater treatment to the food and…

Ultrasonic Depth Sensor vs Ultrasonic Level Sensor

What is the difference between Ultrasonic Depth Sensor and Ultrasonic Level Sensor? Recently, many customers have questioned whether Ultrasonic Depth…

How to Choose Explosion Proof Ultrasonic Level Sensor?

Are you looking for a way to measure the liquid level in a hazardous area without any risk of explosion?…

How to Measure River Water Level?

River water level monitoring is very important. There are many places where remote water level monitoring is required. Such as…

New Choice for Heating Oil Tank Level Sensor

A heating oil tank level sensor is a device that accurately measures the amount of heating oil in your tank…

What Is Capacitive Level Sensor?

What is a Capacitive Level Sensor? Simply put, it’s a device used to accurately measure the level of materials in…

Q&A

Fluid level sensors are termed as the sensors used for detecting liquid levels or interfaces between liquids. Such as water and oil or solids and liquids. These sensors can also be defined as transducers or as integrated systems with instrumentation and control capabilities. This type of fluid level sensor is one of the most important sensors. Fluid level sensor plays a vital role in a variety of industrial and applications.

Industrial applications include fluid-level sensing in transport tanks, storage tanks and water treatment tanks. And also in the petrochemical industries for sensing liquids. Such as petrol, diesel and other fuels. Liquid level measurement is significant in household applications. Including electronic devices. Such as, water dispensers, water evaporators, steamers.

The monitoring system of boilers, heating systems. Washing machines, steam irons, juice squeezers, automated coffee machines, etc.

Fluid Level sensors are designed for specific applications compared to general applications.

Extended reading: Diesel Tank Level Monitoring System

Point level sensors are devices that detect variation in liquid levels. And the levels are based on the presence or absence of liquid media at various points in a vessel or tank. Most often, the function of point level sensors is: High level or low-level alarms. Spill-prevention sensors. Pump protection alarms. Or pump control components.

In the simplest terms, point level sensors operate in either an on or off state. And point level sensors are used to control external devices that share an on/off functionality.
Examples of liquid level sensors that can work as point-level sensors:

Horizontal Float Switches
Vertical Float Switches
Ultrasonic Liquid Level Sensors
Optical Liquid Level Sensors

Fuel tank level measurement can be achieved by using fuel level sensors. These Fuel level sensors work on a hydrostatic pressure principle. By installing a sensor at the base of the fuel tank can associate the pressure created by the level of fuel above the device. And this has a direct relationship to the level by a simple calculation. This calculation can be seen by using the Impress conversion software here.

The things to consider when selecting a fuel level sensor is that the materials used are compatible with the type of fuel you have so for instance on the submersible devices you must make sure that the pressure diaphragm, O ring seals, housing material and Cable sheath are all suitable for complete submersion in the fuel.

Typically we would suggest using a PTFE or FEP cable sheath but for petrol or gasoline although a specially made Hytrel cable may be necessary.

If the installation is a screw-type fitting in the base of the tank then just the housing, O ring seal, and diaphragm are of concern. Ceramic pressure sensor or stainless steel silicon pressure sensors are fine and a stainless steel housing are recommended.

Ultrasonic Sensors are good choice for Water Level Measurement.

The water and wastewater industry has many requirements for measuring the level of water. In applications such as flumes, weirs, pipes, tanks, wells, basins, and cooling towers. Ultrasonic sensors are reliable, cost-effective instruments for these applications. In operation, the sensor is mounted over the water. To determine the distance to the water, it transmits a sound pulse that reflects from the surface of the water. And measures the time it takes for the echo to return.

Sometimes structural components, such as a small pipe, are located in the acoustic path between the ultrasonic sensor and the water. They can reflect a portion of the sound and produce a false echo that interferes with the ability of the sensor to properly detect the echo from the surface of the water. Advanced ultrasonic sensors can be adjusted to ignore these false echoes, which therefore enables them to provide accurate water level measurements.

Extended reading: Sludge flow meter for sewage treatment return activated sludge system

There are 7 main types of level transmitters that Sino-Instrument offers. Each type of transmitter works in a different way, and makes it useful for different types of processes.

Capacitance Level Transmitters
Hydrostatic Level Transmitters
Magnetic Level Transmitters
Radar Fill Level Transmitters
Ultrasonic Level Transmitter
Guided Microwave Level Transmitters
Liquid Level Transmitters

Let’s take a closer look at how different types of level transmitters work.

Sino-Inst offers over 10 level transmitters for level measurement.

About 50% of these are liquid level meters, 40% is the tank level sensor.

A wide variety of level meters options are available to you, such as free samples, paid samples.

Sino-Instrument is a globally recognized supplier and manufacturer of level measurement instrumentation, located in China.

Request a Quote

Please enable JavaScript in your browser to submit the form

Request a Quote

Please enable JavaScript in your browser to submit the form

KimGuo11

drurylandetheatre.com

Featured Continuous Level Sensors

What is a Continuous Liquid Level Sensor?

Continuous level sensor definition

Difference between a point level sensor and a continuous level sensor?

point level sensors

Continuous level sensor 4-20 ma

Measuring techniques for continuous level measurement

Applications

bin/silo level sensors

tank level sensor

powder level sensors

laser water level sensor

external water tank level indicator

How to select a continuous level sensor?

Frequently Asked Questions

What is continuous level measurement?

What are the different types of level sensors?

What is a point level sensor?

What type of sensor is a fuel level sensor?

What is the difference between a point level measurement and a continuous level measurement?

What is meant by point level measurement?

Technical Support

Features of SI-U05 Cable Float Level Sensor

Specifications of SI-U05 Cable Float Level Sensor

Applicaitons of Cable Float Level Sensor & Swtich

Working Principle of Float Level Sensor

Float Level Sensor Installation

Other types of Float Level Switches

Q&A

Techinical Support

Features of Magnetic Float Level Sensor

Applications of Magnetic Float Level Sensor

Specifications of SI-U04 Magnetic Float Level Sensor-Reed Switch

Operation Principle of Magnetic Float Level Sensor

Types of Magnetic Float

Other types of Continuous magnetic float level switches

Q&A

Technical Support

Magnetic float level sensor manufacturer

SI-U03 Float Switch Water Level Controller

Float Switch Water Level Controller Features

Specifications of SI-U03 Float Switch Water Level Controller

How to install float switch in water storage tank?

How does a float switch water level controller work?

Water Tank Level Controller

Water Level Sensors for Water Tanks

Water Tank Level Control System

remote water tank level sensor

electronic water level sensor

external water tank level indicator

Frequently Asked Questions

How does a float water level sensor work?

Water level float switch price

How do you use a float switch in a water storage tank?

What is water level control?

How do you adjust a float switch?

How do you make an automatic water level controller?

What is the difference between level switch and float switch?

What is the function of the float level switch?

Related Products

Technical Support

Features of SI-U02 Multi Level Float Switch

Specifications of SI-U02 Multi Level Float Switch

SI-U02 Multi Level Float Switch Types

How does a float level switch work ?

Applications of Multi-Point Liquid Level Float Switch

SI-U02 Multi Level Float Switch Dimension

Installation Precautions

More Featured liquid Level Sensors and Switches

Description of SI-U01 Float Level Sensor

Features of SI-U01 Continuous Float Level Sensor

Specifications of SI-U01 Float Level Sensor

Float Level Sensor Operating Principle

Applications of SI-U01 Float Level Sensor

Float level sensor Advantages and Disadvantages

Float level sensor for water tank & fuel tank

Float Level Sensor for tank liquid volume monitoring

SI-U01 Float Leve Sensor Installation

SI-U01 Float level sensor installation instructions:

Float level sensor price

Frequently
Asked
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Frequently
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