Table of Contents

What is water level sensor?

How does the water level sensor work?

Where to use water degree sensors?

What are the benefits of water level sensors?

What are the kinds of water degree sensors?

Magnetic flap stage gauge

Optical water degree sensor

Capacitance liquid degree sensor

Hydrostatic stage transmitter

Tuning fork stage sensor

Diaphragm liquid level sensor

Float water degree sensor

Ultrasonic liquid level sensor

Radar stage gauge

Conclusion

What is water degree sensor?

Water level sensor is a tool that measures the high or low degree of a liquid in a set vessel. According to the strategy of liquid stage measurement, there are two kinds of contact and non-contact. What we name enter water level transmitter is a contact measurement, which converts the height of liquid stage into electrical sign output. It is a widely used water degree transmitter at present.
Various degree sensors

How does the water level sensor work?

The working principle of the water level sensor is that when it is placed into the liquid to be measured at a certain depth, the stress on the front surface of the sensor is converted into the liquid level peak. The calculation formula is Ρ=ρ.g.H+Po, the place P is the sensor surface strain, ρ is the density of the liquid to be measured, g is the local acceleration of gravity, Po is the atmospheric strain on the surface of the liquid, and H is the depth of the sensor dropped into the liquid.
Where to make use of water degree sensors?

Uses of water level sensors embody the following applications.
Water stage measurement in swimming pools and tanks

Water stage measurement in rivers and lakes

Marine water level measurement

Level measurement of acid and alkaline liquids

Oil level measurement of oil trucks and mailboxes

Swimming pool water degree control

Tsunami warning and sea level monitoring

Cooling tower water degree management

Sewage pump water stage control

Liquid stage distant monitoring

What are the advantages of water stage sensors?

Simple construction: no movable or elastic components, extremely reliable, no common upkeep during use. Simple and simple to function.
Easy set up: When using, first join one finish of the wire accurately, then put the opposite end of the water stage probe into the answer to be measured.
Range optional: It can measure the water stage inside the range of 1-200 meters, and different measurement ranges can also be customized.
Wide range of utility: It is suitable for liquid level measurement of high temperature and strain, strong corrosion, excessive air pollution and other media.
Wide range of measuring medium: from water, oil to high viscosity paste could be measured with high accuracy, and the temperature compensation vary is wide, not affected by the blistering, deposition and electrical traits of the measured medium.
Long service life: common liquid degree sensor can be used in a traditional surroundings for 4-5 years, in a harsh environment may additionally be used for 2-3 years.
Powerful: may be instantly linked to the digital display table real-time show values, may additionally be connected to a big selection of controllers to set the upper and decrease limits to regulate the amount of water within the container.
Accurate measurement: built-in high-quality sensors, excessive sensitivity, quick response time, accurately mirror the delicate adjustments in the move or static liquid degree, excessive measurement accuracy.
Various sorts: The liquid level sensor has various construction designs similar to input sort, straight rod kind, flange type, threaded type, induction kind, screw-in kind, float sort, etc. It can meet the measurement wants of varied locations.
What are the types of water level sensors?

Here are 9 types of liquid stage sensors on your reference.
Display of various liquid degree sensors

Magnetic flap level gauge

Magnetic flip level gauge (also often recognized as magnetic float stage gauge) primarily based on the buoyancy principle and magnetic coupling developed. When the liquid level within the measured container rises and falls, the magnetic float in the body tube of the level gauge also rises and falls. The everlasting magnetic steel within the float is transferred to the magnetic flip column indicator by way of magnetic coupling, driving the red and white flip column to turn 180°. When the liquid degree rises, the flip column changes from white to red, and when the liquid stage drops, the flip column modifications from red to white. The purple and white junction of the indicator is the precise top of the liquid degree contained in the container, so as to comprehend a transparent indication of the liquid stage.
Magnetic flap stage gauge picture

Characteristics:
Wide range of application, installation of assorted types, appropriate for any medium level, interface measurement.
The measured medium is totally isolated from the indicating structure, with good sealing performance, leakproof, and excessive reliability for liquid stage measurement under excessive pressure, high temperature and corrosion conditions.
Set subject indication, distant transmission, alarm management about one and may be adjusted freely, totally practical dual-color indication with luminous, continuous and intuitive, eye-catching, massive measurement range, statement direction may be arbitrarily changed.
Good vibration resistance, can adapt to the state of affairs of liquid stage fluctuation simple construction, handy set up, low maintenance price.
With fantastic magnetic metal corrector, on-site adjustment of technical parameters.
Optical water level sensor

Optical sensors are solid-state. They use infrared LEDs and phototransistors, that are optically coupled when the sensor is in the air. When the sensing head is immersed in a liquid, the infrared light escapes, inflicting the output to vary. These sensors can detect the presence or absence of almost any liquid. They are insensitive to ambient mild, unaffected by bubbles in air, and unaffected by small air bubbles in liquids. This makes them useful in situations where modifications in condition have to be recorded rapidly and reliably, and the place they’ll function reliably for lengthy periods without maintenance.
Optical water stage sensor picture

Advantages: non-contact measurement, excessive accuracy, quick response time.
Disadvantages: Do not use in direct daylight, water vapor will have an result on the measurement accuracy.
Capacitance liquid degree sensor

Capacitive degree switches use 2 conductive electrodes (usually made of metal) in a circuit with a short distance between them. When the electrodes are immersed in the liquid, it completes the circuit.
Capacitance liquid stage sensor image

Advantages: It can be utilized to determine the rise or fall of liquid in a container. By making the electrodes and the container the same height, the capacitance between the electrodes could be measured. No capacitance means no liquid. A full capacitance represents a full vessel. The “empty” and “full” measurements must be recorded, and the extent is then displayed using 0% and one hundred pc calibration meters.
Disadvantage: Corrosion of the electrodes will change the capacitance of the electrodes and require cleaning or recalibration.
Hydrostatic level transmitter

Hydrostatic level meter is based on the precept that the static pressure of the measured liquid is proportional to the peak of that liquid, and makes use of an isolated diffusion silicon sensitive element or ceramic capacitive pressure sensitive sensor with wonderful performance to transform the static stress into an electrical signal, which is then converted into a normal electrical signal (generally 4-20mA/1-5VDC) after temperature compensation and linearity correction.
Hydrostatic level transmitter image

Characteristics

Good stability, full degree, zero long-term stability up to 0.1%FS/ year. The temperature drift is less than 0.1%FS within the compensation temperature range from zero ℃ to 70 ℃ and fewer than zero.3%FS in the whole allowable operating temperature vary.
With reverse safety, current limiting protection circuit, in the installation of optimistic and adverse polarity connection won’t harm the transmitter, irregular transmitter will automatically restrict the present within 35MA.
Solid structure, no moving elements, excessive reliability, lengthy service life.
Easy to put in, simple structure, financial and durable.
Tuning fork degree sensor

The tuning fork degree meter is a liquid level stage switching device designed utilizing the tuning fork precept. The working principle of the change is to cause its vibration by the resonance of a piezoelectric crystal.
Tuning fork stage sensor picture

Every object has its resonant frequency. The resonant frequency of an object is expounded to the size, mass, form, and force of the thing. A typical example of the resonant frequency of an object is: the same glass is repeatedly full of water of different heights and tapped to carry out instrumental music.
เกจวัดแรงดัน : can be actually unbiased of move, bubbles, kind of liquid, etc. No calibration is required.
Disadvantage: cannot be used for viscous media.
Diaphragm liquid degree sensor

Diaphragm or pneumatic stage switches rely on air strain to push the diaphragm, which engages a microswitch contained in the physique of the device. As the level increases, the strain in the detection tube increases until the microswitch is activated. As the level drops, the air pressure also drops and the change opens.
Diaphragm liquid stage sensor image

Advantages: The tank doesn’t require electrical energy, can be utilized with quite so much of liquids, and the switch doesn’t come into contact with the liquid.
Disadvantages: upkeep is required over time as a end result of it’s a mechanical device.
Float water stage sensor

Float stage switches are the unique level sensors. They are mechanical devices. A hollow float is attached to the arm. As the float rises and falls in the liquid, the arm shall be pushed up and down. The arm may be related to a magnetic or mechanical change to determine on/off, or to a degree gauge that may go from full to empty as the extent drops.
Float switches for water pumps are a price efficient method to measure water ranges in basement pumping pits.
Float water level sensor image

Advantages: Float switches can measure any kind of liquid and may be designed to function with none power supply.
Disadvantages: They are bigger than other forms of switches, and since they are mechanical, they have to be used extra regularly than different level switches.
Ultrasonic liquid level sensor

The ultrasonic level meter is a digital stage meter controlled by a microprocessor. In the measurement, ultrasonic pulses are emitted by a transducer (transducer). The sound waves are reflected by the liquid stage and acquired by the same transducer. It is transformed into an electrical signal by a piezoelectric crystal. The time between the emission and reception of the acoustic wave is used to calculate a measure of the gap to the liquid surface.
Ultrasonic liquid stage sensor image

Ultrasonic water level sensor works on the precept that the ultrasonic transducer (probe) emits high-frequency pulse sound waves when it encounters the measured level (object) floor, is mirrored, and the reflected echo is obtained by the sensor. Transducer and transformed into an electrical sign. The propagation time of the sound wave. It is proportional to the space of the sound wave to the surface of the item. Sound wave propagation distance S with the pace of sound C and sound propagation time T could be expressed within the formula: S = C × T / 2.
Advantages: non-contact measurement, the measured medium is almost unlimited, and could be extensively used to measure the peak of assorted liquids and strong supplies.
Disadvantages: the measurement accuracy is affected by the current ambient temperature and dust.
Radar level gauge

Radar level gauge is a degree measurement instrument based mostly on the time travel precept. The radar wave travels on the pace of light and the journey time can be transformed right into a degree signal by digital elements. The probe emits excessive frequency pulses traveling at the pace of light in area. When the pulses encounter the surface of the fabric, they are reflected and received by the receiver inside the instrument, changing the distance sign right into a stage sign.
Radar degree gauge picture

Advantages: wide selection of utility, unaffected by temperature, mud, steam, and so forth.
Disadvantages: straightforward to generate interference echoes, affecting the measurement accuracy.
Conclusion

In many industrial applications, one of the essential parts of process management is figuring out how much gas or liquid is current in a given vessel. There is a necessity to ensure that the fill stage of a given substance doesn’t overflow. Therefore, level measurement transmitters play an important role in monitoring the liquid degree of a vessel, container or tank. For further questions or necessities please contact our skilled engineers..
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Table of Contents

What is water level sensor?

How does the water stage sensor work?

Where to make use of water level sensors?

What are the benefits of water stage sensors?

What are the types of water stage sensors?

Magnetic flap degree gauge

Optical water degree sensor

Capacitance liquid degree sensor

Hydrostatic stage transmitter

Tuning fork level sensor

Diaphragm liquid level sensor

Float water degree sensor

Ultrasonic liquid degree sensor

Radar degree gauge

Conclusion

What is water degree sensor?

Water degree sensor is a tool that measures the excessive or low stage of a liquid in a exhausting and fast vessel. According to the strategy of liquid level measurement, there are two forms of contact and non-contact. What we name enter water degree transmitter is a contact measurement, which converts the height of liquid level into electrical sign output. It is a widely used water stage transmitter at current.
Various degree sensors

How does the water degree sensor work?

The working principle of the water stage sensor is that when it’s positioned into the liquid to be measured at a certain depth, the pressure on the entrance surface of the sensor is transformed into the liquid stage top. The calculation formula is Ρ=ρ.g.H+Po, the place P is the sensor surface stress, ρ is the density of the liquid to be measured, g is the native acceleration of gravity, Po is the atmospheric strain on the surface of the liquid, and H is the depth of the sensor dropped into the liquid.
Where to make use of water stage sensors?

Uses of water level sensors include the following functions.
Water degree measurement in pools and tanks

Water degree measurement in rivers and lakes

Marine water degree measurement

Level measurement of acid and alkaline liquids

Oil degree measurement of oil vehicles and mailboxes

Swimming pool water degree control

Tsunami warning and sea degree monitoring

Cooling tower water level control

Sewage pump water stage management

Liquid level remote monitoring

What are the advantages of water degree sensors?

Simple construction: no movable or elastic components, extremely reliable, no common upkeep during use. Simple and simple to operate.
Easy set up: When using, first join one finish of the wire correctly, then put the opposite finish of the water level probe into the answer to be measured.
Range elective: It can measure the water level throughout the range of 1-200 meters, and different measurement ranges may additionally be custom-made.
Wide vary of utility: It is suitable for liquid degree measurement of high temperature and pressure, robust corrosion, high air pollution and other media.
Wide vary of measuring medium: from water, oil to excessive viscosity paste may be measured with high accuracy, and the temperature compensation range is extensive, not affected by the blistering, deposition and electrical traits of the measured medium.
Long service life: basic liquid level sensor can be utilized in a standard setting for 4-5 years, in a harsh setting may also be used for 2-3 years.
Powerful: can be instantly connected to the digital display table real-time show values, can be related to quite a lot of controllers to set the upper and lower limits to manage the amount of water within the container.
Accurate measurement: built-in high-quality sensors, excessive sensitivity, fast response time, accurately mirror the subtle modifications in the move or static liquid level, excessive measurement accuracy.
Various varieties: The liquid degree sensor has numerous structure designs corresponding to enter type, straight rod type, flange sort, threaded type, induction kind, screw-in sort, float type, etc. It can meet the measurement needs of varied places.
What are the kinds of water level sensors?

Here are 9 kinds of liquid stage sensors in your reference.
Display of various liquid stage sensors

Magnetic flap level gauge

Magnetic flip level gauge (also known as magnetic float level gauge) based on the buoyancy principle and magnetic coupling developed. When the liquid level within the measured container rises and falls, the magnetic float within the physique tube of the extent gauge also rises and falls. The permanent magnetic steel within the float is transferred to the magnetic flip column indicator through magnetic coupling, driving the pink and white flip column to turn 180°. When the liquid degree rises, the flip column modifications from white to purple, and when the liquid degree drops, the flip column changes from pink to white. The pink and white junction of the indicator is the actual peak of the liquid degree contained in the container, so as to understand a clear indication of the liquid degree.
Magnetic flap stage gauge picture

Characteristics:
Wide vary of software, set up of various types, suitable for any medium level, interface measurement.
The measured medium is totally isolated from the indicating construction, with good sealing performance, leakproof, and high reliability for liquid degree measurement beneath high strain, excessive temperature and corrosion situations.
Set subject indication, distant transmission, alarm control about one and can be adjusted freely, totally useful dual-color indication with luminous, steady and intuitive, eye-catching, large measurement range, remark path could be arbitrarily modified.
Good vibration resistance, can adapt to the scenario of liquid degree fluctuation easy structure, handy set up, low maintenance cost.
With pressure gauge 10 bar , on-site adjustment of technical parameters.
Optical water degree sensor

Optical sensors are solid-state. They use infrared LEDs and phototransistors, which are optically coupled when the sensor is in the air. When the sensing head is immersed in a liquid, the infrared mild escapes, causing the output to alter. These sensors can detect the presence or absence of simply about any liquid. They are insensitive to ambient light, unaffected by bubbles in air, and unaffected by small air bubbles in liquids. This makes them helpful in situations where modifications in situation have to be recorded shortly and reliably, and where they’ll operate reliably for lengthy intervals without upkeep.
Optical water degree sensor picture

Advantages: non-contact measurement, excessive accuracy, fast response time.
Disadvantages: Do not use in direct daylight, water vapor will affect the measurement accuracy.
Capacitance liquid degree sensor

Capacitive degree switches use 2 conductive electrodes (usually manufactured from metal) in a circuit with a brief distance between them. When the electrodes are immersed within the liquid, it completes the circuit.
Capacitance liquid degree sensor picture

Advantages: It can be used to determine the rise or fall of liquid in a container. By making the electrodes and the container the identical peak, the capacitance between the electrodes could be measured. No capacitance means no liquid. A full capacitance represents a full vessel. The “empty” and “full” measurements should be recorded, and the level is then displayed utilizing 0% and one hundred pc calibration meters.
Disadvantage: Corrosion of the electrodes will change the capacitance of the electrodes and require cleaning or recalibration.
Hydrostatic degree transmitter

Hydrostatic degree meter is based on the principle that the static strain of the measured liquid is proportional to the peak of that liquid, and uses an isolated diffusion silicon delicate component or ceramic capacitive pressure sensitive sensor with glorious efficiency to convert the static pressure into an electrical sign, which is then converted into a standard electrical signal (generally 4-20mA/1-5VDC) after temperature compensation and linearity correction.
Hydrostatic degree transmitter picture

Characteristics

Good stability, full degree, zero long-term stability as a lot as 0.1%FS/ 12 months. The temperature drift is lower than zero.1%FS in the compensation temperature vary from zero ℃ to 70 ℃ and less than 0.3%FS in the entire allowable operating temperature range.
With reverse safety, present limiting safety circuit, in the set up of constructive and unfavorable polarity connection is not going to harm the transmitter, abnormal transmitter will automatically limit the present inside 35MA.
Solid structure, no transferring components, excessive reliability, long service life.
Easy to put in, simple structure, financial and durable.
Tuning fork stage sensor

The tuning fork level meter is a liquid level level switching software designed utilizing the tuning fork principle. The working precept of the switch is to trigger its vibration by the resonance of a piezoelectric crystal.
Tuning fork level sensor image

Every object has its resonant frequency. The resonant frequency of an object is said to the dimensions, mass, form, and drive of the item. A typical instance of the resonant frequency of an object is: the identical glass is continuously filled with water of various heights and tapped to perform instrumental music.
Advantages: can be really unbiased of flow, bubbles, sort of liquid, and so on. No calibration is required.
Disadvantage: cannot be used for viscous media.
Diaphragm liquid degree sensor

Diaphragm or pneumatic stage switches depend on air strain to push the diaphragm, which engages a microswitch contained in the body of the gadget. As the level will increase, the strain within the detection tube will increase till the microswitch is activated. As the level drops, the air stress also drops and the swap opens.
Diaphragm liquid stage sensor picture

Advantages: The tank does not require electricity, can be used with quite so much of liquids, and the switch does not come into contact with the liquid.
Disadvantages: upkeep is required over time because it is a mechanical gadget.
Float water degree sensor

Float degree switches are the original degree sensors. They are mechanical units. A hole float is attached to the arm. As the float rises and falls in the liquid, the arm will be pushed up and down. The arm can be connected to a magnetic or mechanical swap to determine on/off, or to a level gauge that can go from full to empty as the level drops.
Float switches for water pumps are a cost effective way to measure water levels in basement pumping pits.
Float water degree sensor picture

Advantages: Float switches can measure any sort of liquid and could be designed to function with none energy supply.
Disadvantages: They are larger than different kinds of switches, and since they’re mechanical, they must be used more frequently than different stage switches.
Ultrasonic liquid level sensor

The ultrasonic stage meter is a digital stage meter managed by a microprocessor. In the measurement, ultrasonic pulses are emitted by a transducer (transducer). The sound waves are reflected by the liquid degree and received by the identical transducer. It is converted into an electrical sign by a piezoelectric crystal. The time between the emission and reception of the acoustic wave is used to calculate a measure of the distance to the liquid floor.
Ultrasonic liquid level sensor image

Ultrasonic water degree sensor works on the precept that the ultrasonic transducer (probe) emits high-frequency pulse sound waves when it encounters the measured degree (object) floor, is reflected, and the mirrored echo is received by the sensor. Transducer and transformed into an electrical sign. The propagation time of the sound wave. It is proportional to the space of the sound wave to the floor of the item. Sound wave propagation distance S with the speed of sound C and sound propagation time T may be expressed in the method: S = C × T / 2.
Advantages: non-contact measurement, the measured medium is nearly limitless, and can be extensively used to measure the peak of assorted liquids and strong supplies.
Disadvantages: the measurement accuracy is affected by the present ambient temperature and dust.
Radar stage gauge

Radar level gauge is a level measurement instrument based mostly on the time journey precept. The radar wave travels at the velocity of sunshine and the travel time may be transformed right into a level sign by electronic elements. The probe emits excessive frequency pulses touring at the velocity of light in house. When the pulses encounter the surface of the material, they’re reflected and received by the receiver inside the instrument, converting the space signal into a level signal.
Radar stage gauge picture

Advantages: wide selection of utility, unaffected by temperature, mud, steam, etc.
Disadvantages: straightforward to generate interference echoes, affecting the measurement accuracy.
Conclusion

In many industrial purposes, one of the important components of process control is understanding how a lot gasoline or liquid is current in a given vessel. There is a need to guarantee that the fill degree of a given substance doesn’t overflow. Therefore, degree measurement transmitters play an important role in monitoring the liquid level of a vessel, container or tank. For further questions or requirements please contact our professional engineers..