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Water level sensor types and works

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มีให้เลือกตั้งแต่ 1/8" - 4"

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มีให้เลือกตั้งแต่ 1/8" - 4"

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Table of Contents

What is water degree sensor?

How does the water stage sensor work?

Where to make use of water level sensors?

What are the advantages of water level sensors?

What are the forms of water degree sensors?

Magnetic flap level gauge

Optical water degree sensor

Capacitance liquid degree sensor

Hydrostatic stage transmitter

Tuning fork level sensor

Diaphragm liquid level sensor

Float water level sensor

Ultrasonic liquid stage sensor

Radar degree gauge

Conclusion

What is water level sensor?

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

How does the water degree sensor work?

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

Uses of water degree sensors embody the next functions.
Water stage measurement in pools and tanks

Water degree measurement in rivers and lakes

Marine water level measurement

Level measurement of acid and alkaline liquids

Oil stage measurement of oil vehicles and mailboxes

Swimming pool water degree management

Tsunami warning and sea stage monitoring

Cooling tower water level control

Sewage pump water stage control

Liquid stage distant monitoring

What are the benefits of water stage sensors?

Simple structure: no movable or elastic elements, extremely reliable, no common maintenance during use. Simple and straightforward to function.
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 solution to be measured.
Range elective: It can measure the water degree throughout the range of 1-200 meters, and other measurement ranges can be personalized.
Wide vary of utility: It is appropriate for liquid stage measurement of high temperature and stress, strong corrosion, high air pollution and different media.
Wide range of measuring medium: from water, oil to high viscosity paste can be measured with excessive accuracy, and the temperature compensation vary is broad, not affected by the blistering, deposition and electrical characteristics of the measured medium.
Long service life: common liquid degree sensor can be used in a standard surroundings for 4-5 years, in a harsh environment can be used for 2-3 years.
Powerful: may be instantly connected to the digital show desk real-time display values, can be connected to a wide range of controllers to set the upper and decrease limits to control the amount of water in the container.
Accurate measurement: built-in high-quality sensors, high sensitivity, fast response time, accurately mirror the refined adjustments in the flow or static liquid degree, high measurement accuracy.
Various sorts: The liquid level sensor has numerous construction designs such as enter type, straight rod sort, flange sort, threaded sort, induction kind, screw-in type, float kind, and so on. It can meet the measurement wants of various places.
What are the types of water level sensors?

Here are 9 forms of liquid degree sensors in your reference.
Display of varied liquid stage sensors

Magnetic flap stage gauge

Magnetic flip degree gauge (also generally recognized as magnetic float level gauge) based mostly on the buoyancy precept and magnetic coupling developed. When the liquid level in the measured container rises and falls, the magnetic float within the body tube of the level gauge also rises and falls. The everlasting magnetic metal within the float is transferred to the magnetic flip column indicator via magnetic coupling, driving the purple and white flip column to show 180°. When the liquid level rises, the flip column adjustments from white to pink, and when the liquid level drops, the flip column changes from purple to white. The red and white junction of the indicator is the precise peak of the liquid stage contained in the container, in order to comprehend a transparent indication of the liquid stage.
Magnetic flap stage gauge picture

Characteristics:
Wide vary of application, installation of assorted varieties, appropriate for any medium degree, interface measurement.
The measured medium is totally isolated from the indicating construction, with good sealing performance, leakproof, and high reliability for liquid level measurement beneath high pressure, high temperature and corrosion conditions.
Set area indication, distant transmission, alarm management about one and may be adjusted freely, totally practical dual-color indication with luminous, steady and intuitive, eye-catching, massive measurement range, remark path can be arbitrarily modified.
Good vibration resistance, can adapt to the situation of liquid level fluctuation simple construction, handy set up, low upkeep cost.
With nice magnetic metal corrector, on-site adjustment of technical parameters.
Optical water stage sensor

Optical sensors are solid-state. They use infrared LEDs and phototransistors, that are optically coupled when the sensor is within 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 virtually 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 the place modifications in condition should be recorded shortly and reliably, and the place they can operate reliably for long intervals with out maintenance.
Optical water stage sensor picture

Advantages: non-contact measurement, excessive accuracy, quick response time.
Disadvantages: Do not use in direct sunlight, water vapor will have an effect on the measurement accuracy.
pressure gauge 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 peak, the capacitance between the electrodes may be measured. No capacitance means no liquid. A full capacitance represents a full vessel. The “empty” and “full” measurements should be recorded, and the extent is then displayed using 0% and 100% calibration meters.
Disadvantage: Corrosion of the electrodes will change the capacitance of the electrodes and require cleaning or recalibration.
Hydrostatic stage transmitter

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

Characteristics

Good stability, full degree, zero long-term stability up to zero.1%FS/ 12 months. The temperature drift is lower than zero.1%FS in the compensation temperature vary from zero ℃ to 70 ℃ and fewer than zero.3%FS in the entire allowable operating temperature vary.
With reverse safety, present limiting protection circuit, in the installation of optimistic and negative polarity connection is not going to injury the transmitter, irregular transmitter will mechanically limit the present within 35MA.
Solid structure, no shifting components, excessive reliability, long service life.
Easy to put in, easy structure, financial and durable.
Tuning fork stage sensor

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

Every object has its resonant frequency. The resonant frequency of an object is said to the dimensions, mass, form, and force of the object. A typical example of the resonant frequency of an object is: the same glass is continuously crammed with water of different heights and tapped to carry out instrumental music.
Advantages: may be really unbiased of move, bubbles, type of liquid, and so forth. No calibration is required.
Disadvantage: cannot be used for viscous media.
Diaphragm liquid degree sensor

Diaphragm or pneumatic level 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 pressure within the detection tube will increase till the microswitch is activated. As the level drops, the air strain additionally drops and the change opens.
Diaphragm liquid level sensor picture

Advantages: The tank doesn’t require electricity, can be used with quite lots of liquids, and the change does not come into contact with the liquid.
Disadvantages: maintenance is required over time as a result of it’s a mechanical gadget.
Float water level sensor

Float stage switches are the original level sensors. They are mechanical units. A hollow 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 related to a magnetic or mechanical change to determine on/off, or to a level gauge that will go from full to empty as the level drops.
Float switches for water pumps are a cost efficient method to measure water ranges in basement pumping pits.
Float water degree sensor picture

Advantages: Float switches can measure any type of liquid and may be designed to function without any power source.
Disadvantages: They are bigger than other kinds of switches, and because they’re mechanical, they must be used more frequently than other degree switches.
pressure gauge 10 bar is a digital stage meter controlled by a microprocessor. In the measurement, ultrasonic pulses are emitted by a transducer (transducer). The sound waves are mirrored by the liquid stage and received by the identical transducer. It is transformed 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 space to the liquid floor.
Ultrasonic liquid stage sensor picture

Ultrasonic water degree sensor works on the principle that the ultrasonic transducer (probe) emits high-frequency pulse sound waves when it encounters the measured stage (object) floor, is reflected, and the mirrored 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 object. 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 nearly unlimited, and may be extensively used to measure the height of various liquids and solid materials.
Disadvantages: the measurement accuracy is affected by the current ambient temperature and dust.
Radar level gauge

Radar level gauge is a level measurement instrument based mostly on the time journey principle. The radar wave travels at the speed of light and the journey time can be converted into a stage signal by electronic parts. The probe emits excessive frequency pulses traveling on the pace of light in area. When the pulses encounter the floor of the fabric, they’re reflected and received by the receiver inside the instrument, changing the space sign right into a level signal.
Radar degree gauge picture

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

In many industrial purposes, one of the necessary components of process control is knowing how a lot gasoline or liquid is present in a given vessel. There is a necessity to make certain that the fill degree of a given substance doesn’t overflow. Therefore, stage measurement transmitters play an essential position in monitoring the liquid degree of a vessel, container or tank. For additional questions or necessities please contact our skilled engineers..
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Table of Contents

What is water level sensor?

How does the water degree sensor work?

Where to use water stage sensors?

What are the benefits of water degree sensors?

What are the types of water degree sensors?

Magnetic flap degree gauge

Optical water stage sensor

Capacitance liquid stage sensor

Hydrostatic degree transmitter

Tuning fork stage sensor

Diaphragm liquid degree sensor

Float water stage sensor

Ultrasonic liquid degree sensor

Radar level gauge

Conclusion

What is water stage sensor?

Water level sensor is a device that measures the excessive or low level of a liquid in a hard and fast vessel. According to the method of liquid stage measurement, there are two forms of contact and non-contact. What we name input water level transmitter is a contact measurement, which converts the height of liquid stage into electrical sign output. It is a extensively used water level transmitter at present.
Various stage sensors

How does the water level sensor work?

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

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

Water stage measurement in rivers and lakes

Marine water stage measurement

Level measurement of acid and alkaline liquids

Oil degree measurement of oil vans and mailboxes

Swimming pool water level management

Tsunami warning and sea level monitoring

Cooling tower water level management

Sewage pump water stage management

Liquid stage remote monitoring

What are the benefits of water stage sensors?

Simple structure: no movable or elastic elements, extraordinarily dependable, no regular upkeep during use. Simple and simple to function.
Easy installation: When utilizing, first connect one finish of the wire accurately, then put the other finish of the water stage probe into the answer to be measured.
Range elective: It can measure the water level within the range of 1-200 meters, and different measurement ranges may also be custom-made.
Wide vary of application: It is appropriate for liquid stage measurement of high temperature and pressure, sturdy corrosion, high pollution and different media.
Wide range of measuring medium: from water, oil to excessive viscosity paste may be measured with excessive accuracy, and the temperature compensation range is broad, not affected by the blistering, deposition and electrical traits of the measured medium.
Long service life: common liquid stage sensor can be used in a traditional surroundings for 4-5 years, in a harsh setting can be used for 2-3 years.
Powerful: can be immediately connected to the digital show desk real-time display values, may additionally be linked to quite so much of controllers to set the upper and decrease limits to regulate the amount of water in the container.
Accurate measurement: built-in high-quality sensors, high sensitivity, quick response time, precisely mirror the delicate modifications within the flow or static liquid level, high measurement accuracy.
Various varieties: The liquid stage sensor has varied construction designs similar to input type, straight rod type, flange type, threaded sort, induction kind, screw-in type, float type, etc. It can meet the measurement wants of assorted locations.
What are the kinds of water stage sensors?

Here are 9 forms of liquid stage sensors on your reference.
Display of various liquid level sensors

Magnetic flap stage gauge

Magnetic flip degree gauge (also generally identified as magnetic float degree gauge) based on the buoyancy precept and magnetic coupling developed. When the liquid degree within the measured container rises and falls, the magnetic float in the body tube of the extent gauge also rises and falls. The permanent magnetic metal within the float is transferred to the magnetic flip column indicator through magnetic coupling, driving the pink and white flip column to show 180°. When the liquid degree rises, the flip column modifications from white to red, and when the liquid degree drops, the flip column adjustments from pink to white. The red and white junction of the indicator is the precise peak of the liquid stage contained in the container, so as to comprehend a transparent indication of the liquid level.
Magnetic flap degree gauge image

Characteristics:
Wide range of software, installation of assorted types, appropriate for any medium degree, interface measurement.
The measured medium is totally isolated from the indicating construction, with good sealing efficiency, leakproof, and excessive reliability for liquid level measurement beneath excessive strain, high temperature and corrosion conditions.
Set subject indication, distant transmission, alarm management about one and could be adjusted freely, totally practical dual-color indication with luminous, steady and intuitive, eye-catching, large measurement vary, remark course could be arbitrarily modified.
Good vibration resistance, can adapt to the situation of liquid stage fluctuation simple structure, handy installation, low upkeep value.
With fantastic magnetic steel corrector, on-site adjustment of technical parameters.
Optical water stage 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, causing the output to alter. These sensors can detect the presence or absence of virtually any liquid. They are insensitive to ambient gentle, unaffected by bubbles in air, and unaffected by small air bubbles in liquids. This makes them helpful in situations the place modifications in situation must be recorded rapidly and reliably, and where they will operate reliably for long durations without maintenance.
diaphragm seal : non-contact measurement, excessive accuracy, quick response time.
Disadvantages: Do not use in direct sunlight, water vapor will have an result on the measurement accuracy.
Capacitance liquid level sensor

Capacitive level switches use 2 conductive electrodes (usually manufactured from 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 find out the rise or fall of liquid in a container. By making the electrodes and the container the same height, the capacitance between the electrodes can be measured. No capacitance means no liquid. A full capacitance represents a full vessel. The “empty” and “full” measurements must be recorded, and the level is then displayed using 0% and 100% calibration meters.
Disadvantage: Corrosion of the electrodes will change the capacitance of the electrodes and require cleansing or recalibration.
Hydrostatic stage transmitter

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

Characteristics

Good stability, full diploma, zero long-term stability as a lot as zero.1%FS/ 12 months. The temperature drift is lower than 0.1%FS within the compensation temperature vary from 0 ℃ to 70 ℃ and fewer than 0.3%FS in the whole allowable operating temperature vary.
With reverse safety, present limiting protection circuit, within the set up of optimistic and negative polarity connection will not harm the transmitter, irregular transmitter will mechanically restrict the present inside 35MA.
Solid construction, no moving parts, high reliability, lengthy service life.
Easy to install, simple construction, financial and durable.
Tuning fork stage sensor

The tuning fork degree meter is a liquid level degree switching software designed using the tuning fork principle. The working principle of the swap is to cause its vibration by the resonance of a piezoelectric crystal.
Tuning fork degree sensor image

Every object has its resonant frequency. The resonant frequency of an object is related 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 different heights and tapped to perform instrumental music.
Advantages: can be truly impartial of flow, bubbles, type of liquid, and so on. No calibration is required.
Disadvantage: cannot be used for viscous media.
Diaphragm liquid stage sensor

Diaphragm or pneumatic degree switches rely on air stress to push the diaphragm, which engages a microswitch contained in the physique of the gadget. As the extent increases, the pressure in the detection tube increases until the microswitch is activated. As the extent drops, the air stress additionally drops and the switch opens.
Diaphragm liquid level sensor picture

Advantages: The tank doesn’t require electrical energy, can be used with a big selection of liquids, and the change does not come into contact with the liquid.
Disadvantages: upkeep is required over time as a result of it’s a mechanical gadget.
Float water degree sensor

Float stage switches are the original level sensors. They are mechanical units. A hole float is hooked up to the arm. As the float rises and falls in the liquid, the arm will be pushed up and down. The arm can be related to a magnetic or mechanical change to find out on/off, or to a level gauge that may go from full to empty as the extent drops.
Float switches for water pumps are a cost effective way to measure water ranges in basement pumping pits.
Float water stage sensor picture

Advantages: Float switches can measure any kind of liquid and may be designed to operate without any energy source.
Disadvantages: They are bigger than other types of switches, and because they are mechanical, they have to be used more incessantly than other degree switches.
Ultrasonic liquid stage sensor

The ultrasonic stage meter is a digital level meter controlled by a microprocessor. In the measurement, ultrasonic pulses are emitted by a transducer (transducer). The sound waves are reflected by the liquid level and obtained by the identical transducer. It is converted 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 floor.
Ultrasonic liquid level sensor image

Ultrasonic water level sensor works on the principle that the ultrasonic transducer (probe) emits high-frequency pulse sound waves when it encounters the measured level (object) floor, is mirrored, and the mirrored 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 distance of the sound wave to the floor of the thing. Sound wave propagation distance S with the velocity of sound C and sound propagation time T can be expressed in the formulation: S = C × T / 2.
Advantages: non-contact measurement, the measured medium is type of limitless, and may be broadly used to measure the height of varied liquids and solid materials.
Disadvantages: the measurement accuracy is affected by the current ambient temperature and mud.
Radar level gauge

Radar stage gauge is a level measurement instrument based on the time journey principle. The radar wave travels on the pace of light and the journey time can be transformed right into a level sign by electronic components. The probe emits high frequency pulses touring at the speed of light in house. When the pulses encounter the floor of the material, they are mirrored and acquired by the receiver inside the instrument, changing the space sign into a level sign.
Radar degree gauge image

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

In many industrial purposes, one of the important parts of course of control is figuring out how much fuel or liquid is present in a given vessel. There is a necessity to guarantee that the fill degree of a given substance doesn’t overflow. Therefore, stage measurement transmitters play an necessary position in monitoring the liquid degree of a vessel, container or tank. For further questions or necessities please contact our skilled engineers..