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 level sensors?
What are the forms of water stage sensors?
Magnetic flap stage gauge
Optical water level sensor
Capacitance liquid stage sensor
Hydrostatic level transmitter
Tuning fork degree sensor
Diaphragm liquid stage sensor
Float water level sensor
Ultrasonic liquid degree sensor
Radar stage gauge
Conclusion
What is water degree sensor?
Water level sensor is a device that measures the high or low level of a liquid in a hard and fast vessel. According to the strategy of liquid degree measurement, there are two types of contact and non-contact. What we call input water level transmitter is a contact measurement, which converts the height of liquid stage into electrical sign output. It is a broadly used water degree transmitter at current.
Various stage sensors
How does the water level sensor work?
The working principle of the water stage sensor is that when it is positioned into the liquid to be measured at a certain depth, the strain on the front surface of the sensor is transformed into the liquid degree height. The calculation formulation 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 stress on the floor 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 stage sensors embrace the next purposes.
Water stage measurement in pools and tanks
Water stage measurement in rivers and lakes
Marine water degree measurement
Level measurement of acid and alkaline liquids
Oil stage measurement of oil vans and mailboxes
Swimming pool water stage control
Tsunami warning and sea stage monitoring
Cooling tower water level management
Sewage pump water level management
Liquid stage distant monitoring
What are the advantages of water degree sensors?
Simple construction: no movable or elastic elements, extraordinarily dependable, no regular upkeep throughout use. Simple and easy to operate.
Easy set up: When using, first join one end of the wire correctly, then put the other end of the water level probe into the solution to be measured.
Range elective: It can measure the water level within the vary of 1-200 meters, and different measurement ranges may also be custom-made.
Wide vary of application: It is suitable for liquid level measurement of high temperature and stress, strong corrosion, excessive pollution and other media.
Wide vary of measuring medium: from water, oil to high viscosity paste can be measured with excessive accuracy, and the temperature compensation vary is wide, 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 normal setting for 4-5 years, in a harsh surroundings can also be used for 2-3 years.
Powerful: can be directly connected to the digital show desk real-time show values, may additionally be connected to a selection of controllers to set the upper and lower limits to control the amount of water within the container.
Accurate measurement: built-in high-quality sensors, high sensitivity, quick response time, accurately reflect the refined modifications in the flow or static liquid degree, excessive measurement accuracy.
Various sorts: The liquid level sensor has various construction designs such as enter type, straight rod type, flange kind, threaded kind, induction kind, screw-in kind, float kind, and so on. It can meet the measurement wants of assorted places.
What are the kinds of water degree sensors?
Here are 9 types of liquid level sensors in your reference.
Display of assorted liquid stage sensors
Magnetic flap degree gauge
Magnetic flip stage gauge (also known as magnetic float degree gauge) based on the buoyancy principle and magnetic coupling developed. When the liquid degree in the measured container rises and falls, the magnetic float within the physique tube of the level gauge additionally rises and falls. The everlasting magnetic metal in the float is transferred to the magnetic flip column indicator via magnetic coupling, driving the pink and white flip column to show 180°. When the liquid level rises, the flip column adjustments from white to purple, and when the liquid stage drops, the flip column adjustments from pink to white. The pink and white junction of the indicator is the precise top of the liquid stage inside the container, so as to understand a transparent indication of the liquid degree.
Magnetic flap level gauge picture
Characteristics:
Wide vary of utility, installation of assorted types, suitable for any medium level, interface measurement.
The measured medium is completely isolated from the indicating structure, with good sealing efficiency, leakproof, and high reliability for liquid stage measurement beneath high strain, excessive temperature and corrosion situations.
Set area indication, distant transmission, alarm control about one and may be adjusted freely, fully functional dual-color indication with luminous, continuous and intuitive, eye-catching, giant measurement vary, observation course can be arbitrarily modified.
Good vibration resistance, can adapt to the state of affairs of liquid level fluctuation simple construction, handy installation, low maintenance price.
With fantastic magnetic metal corrector, on-site adjustment of technical parameters.
Optical water stage sensor
Optical sensors are solid-state. They use infrared LEDs and phototransistors, which are optically coupled when the sensor is within the air. When the sensing head is immersed in a liquid, the infrared gentle escapes, inflicting the output to alter. These sensors can detect the presence or absence of almost any liquid. They are insensitive to ambient light, unaffected by bubbles in air, and unaffected by small air bubbles in liquids. This makes them useful in conditions where modifications in condition have to be recorded shortly and reliably, and the place they’ll operate reliably for lengthy periods with out upkeep.
Optical water stage sensor picture
Advantages: non-contact measurement, high accuracy, quick response time.
Disadvantages: Do not use in direct daylight, water vapor will have an effect on the measurement accuracy.
Capacitance liquid stage sensor
Capacitive degree switches use 2 conductive electrodes (usually made of metal) in a circuit with a brief distance between them. When the electrodes are immersed within the liquid, it completes the circuit.
Capacitance liquid level 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 must be recorded, and the level is then displayed using 0% and 100 percent calibration meters.
Disadvantage: Corrosion of the electrodes will change the capacitance of the electrodes and require cleansing or recalibration.
Hydrostatic level transmitter
Hydrostatic degree meter relies on the principle that the static pressure of the measured liquid is proportional to the peak of that liquid, and makes use of an isolated diffusion silicon delicate element or ceramic capacitive pressure sensitive sensor with excellent efficiency to convert the static strain into an electrical sign, which is then transformed into a standard electrical sign (generally 4-20mA/1-5VDC) after temperature compensation and linearity correction.
Hydrostatic level transmitter picture
Characteristics
Good stability, full degree, zero long-term stability as much as zero.1%FS/ year. The temperature drift is less than zero.1%FS within the compensation temperature vary from 0 ℃ to 70 ℃ and fewer than 0.3%FS in the whole allowable working temperature vary.
With reverse protection, present limiting protection circuit, within the set up of constructive and adverse polarity connection won’t injury the transmitter, irregular transmitter will mechanically limit the present inside 35MA.
Solid construction, no transferring elements, high reliability, lengthy service life.
Easy to put in, simple construction, economic and durable.
Tuning fork level sensor
The tuning fork degree meter is a liquid point degree switching device designed using the tuning fork precept. The working precept of the switch is to cause its vibration by the resonance of a piezoelectric crystal.
Tuning fork degree sensor picture
Every object has its resonant frequency. The resonant frequency of an object is said to the scale, mass, form, and force of the object. A typical example of the resonant frequency of an object is: the same glass is repeatedly full of water of various heights and tapped to perform instrumental music.
Advantages: could be really impartial of circulate, bubbles, type of liquid, etc. No calibration is required.
Disadvantage: cannot be used for viscous media.
Diaphragm liquid degree sensor
Diaphragm or pneumatic degree switches rely on air strain to push the diaphragm, which engages a microswitch inside the body of the system. As the extent increases, the strain within the detection tube increases until the microswitch is activated. As the extent drops, the air strain also drops and the change opens.
Diaphragm liquid degree sensor image
Advantages: The tank doesn’t require electrical energy, can be utilized with quite so much of liquids, and the change does not come into contact with the liquid.
Disadvantages: maintenance is required over time as a result of it is a mechanical system.
Float water level sensor
Float level switches are the unique stage sensors. They are mechanical gadgets. A hole float is connected to the arm. As the float rises and falls within the liquid, the arm shall be pushed up and down. The arm can be linked to a magnetic or mechanical change to discover out on/off, or to a degree gauge that will go from full to empty as the level drops.
Float switches for water pumps are a value effective way to measure water ranges in basement pumping pits.
Float water degree sensor image
Advantages: Float switches can measure any kind of liquid and may be designed to operate with none energy supply.
Disadvantages: They are larger than different types of switches, and since they’re mechanical, they must be used extra frequently than different level switches.
Ultrasonic liquid level sensor
The ultrasonic stage 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 mirrored by the liquid level and obtained by the same 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 space to the liquid floor.
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 stage (object) surface, is reflected, and the reflected echo is received by the sensor. Transducer and converted into an electrical signal. 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 pace of sound C and sound propagation time T could be expressed in the formula: S = C × T / 2.
Advantages: non-contact measurement, the measured medium is almost unlimited, and could be broadly used to measure the height of varied liquids and stable materials.
Disadvantages: the measurement accuracy is affected by the current ambient temperature and dirt.
Radar degree gauge
Radar stage gauge is a degree measurement instrument based on the time travel principle. The radar wave travels on the velocity of light and the travel time can be transformed into a stage signal by digital elements. The probe emits high frequency pulses touring at the velocity of light in area. When the pulses encounter the floor of the material, they’re mirrored and obtained by the receiver contained in the instrument, converting the distance signal right into a stage sign.
Radar degree gauge image
Advantages: wide selection of application, unaffected by temperature, mud, steam, and so on.
Disadvantages: easy to generate interference echoes, affecting the measurement accuracy.
Conclusion
In many industrial applications, one of many essential components of process control is understanding how a lot gasoline or liquid is current in a given vessel. There is a necessity to guarantee that the fill stage of a given substance does not overflow. Therefore, level measurement transmitters play an essential function in monitoring the liquid degree of a vessel, container or tank. For additional questions or requirements please contact our professional engineers..
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Table of Contents
What is water stage sensor?
How does the water level sensor work?
Where to use water stage sensors?
What are the benefits of water degree sensors?
What are the forms of water level sensors?
Magnetic flap level gauge
Optical water degree sensor
Capacitance liquid level sensor
Hydrostatic degree transmitter
Tuning fork degree sensor
Diaphragm liquid level sensor
Float water stage sensor
Ultrasonic liquid level sensor
Radar stage gauge
Conclusion
What is water stage sensor?
Water degree sensor is a tool that measures the high or low degree of a liquid in a hard and fast vessel. According to the strategy of liquid degree measurement, there are two kinds of contact and non-contact. What we call enter water degree transmitter is a contact measurement, which converts the peak of liquid stage into electrical sign output. It is a extensively used water degree transmitter at present.
Various degree sensors
How does the water degree sensor work?
The working principle of the water degree sensor is that when it is placed into the liquid to be measured at a sure depth, the pressure on the front surface of the sensor is converted into the liquid stage top. The calculation method 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 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 stage sensors?
Uses of water level sensors embrace the following functions.
Water stage measurement in swimming pools and tanks
Water degree measurement in rivers and lakes
Marine water level measurement
Level measurement of acid and alkaline liquids
Oil level measurement of oil vehicles and mailboxes
Swimming pool water level management
Tsunami warning and sea level monitoring
Cooling tower water degree management
Sewage pump water level management
Liquid degree remote monitoring
What are the advantages of water stage sensors?
Simple construction: no movable or elastic elements, extremely dependable, no regular upkeep throughout use. Simple and straightforward to operate.
Easy set up: When using, first join one finish of the wire accurately, then put the other finish of the water degree probe into the solution to be measured.
Range optionally available: It can measure the water stage within the vary of 1-200 meters, and other measurement ranges can be personalized.
Wide range of application: It is suitable for liquid degree measurement of high temperature and strain, strong corrosion, excessive pollution and different media.
Wide range of measuring medium: from water, oil to high viscosity paste could be measured with high 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 level sensor can be used in a normal environment for 4-5 years, in a harsh environment can be used for 2-3 years.
Powerful: may be directly linked to the digital show desk real-time show values, can be connected to a variety of controllers to set the higher and lower limits to regulate the quantity of water within the container.
Accurate measurement: built-in high-quality sensors, high sensitivity, quick response time, accurately mirror the delicate modifications in the circulate or static liquid stage, high measurement accuracy.
Various types: The liquid degree sensor has varied construction designs such as enter kind, straight rod kind, flange kind, threaded sort, induction type, screw-in type, float sort, and so on. It can meet the measurement needs of assorted locations.
What are the forms of water degree sensors?
Here are 9 types of liquid level sensors in your reference.
Display of varied liquid degree sensors
Magnetic flap stage gauge
Magnetic flip stage gauge (also often known as magnetic float level gauge) based on the buoyancy precept and magnetic coupling developed. When the liquid degree in the measured container rises and falls, the magnetic float within the physique tube of the extent gauge also rises and falls. The everlasting magnetic metal in the float is transferred to the magnetic flip column indicator via magnetic coupling, driving the purple 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 red to white. The pink and white junction of the indicator is the actual peak of the liquid stage contained in the container, so as to comprehend a clear indication of the liquid stage.
Magnetic flap degree gauge picture
Characteristics:
Wide vary of utility, set up of varied forms, suitable for any medium level, interface measurement.
The measured medium is totally isolated from the indicating construction, with good sealing performance, leakproof, and excessive reliability for liquid degree measurement under high stress, excessive temperature and corrosion conditions.
Set field indication, remote transmission, alarm management about one and could be adjusted freely, totally functional dual-color indication with luminous, continuous and intuitive, eye-catching, large measurement range, observation path can be arbitrarily changed.
Good vibration resistance, can adapt to the scenario of liquid degree fluctuation easy construction, convenient set up, low maintenance cost.
With fine magnetic steel corrector, on-site adjustment of technical parameters.
Optical water stage 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, inflicting the output to vary. These sensors can detect the presence or absence of simply about any liquid. เกวัดแรงดันน้ำ are insensitive to ambient gentle, unaffected by bubbles in air, and unaffected by small air bubbles in liquids. This makes them useful in conditions where modifications in situation should be recorded quickly and reliably, and where they’ll operate reliably for long intervals with out maintenance.
Optical water degree sensor picture
Advantages: non-contact measurement, high accuracy, quick response time.
Disadvantages: Do not use in direct sunlight, water vapor will have an effect on the measurement accuracy.
Capacitance liquid stage sensor
Capacitive stage 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 stage 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 same peak, 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 have to 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 cleaning or recalibration.
Hydrostatic degree transmitter
Hydrostatic stage meter is predicated on the precept that the static strain of the measured liquid is proportional to the height of that liquid, and makes use of an isolated diffusion silicon delicate element or ceramic capacitive strain delicate sensor with wonderful performance to transform the static strain into an electrical sign, which is then transformed into a normal electrical sign (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 0.1%FS/ year. The temperature drift is lower than zero.1%FS in the compensation temperature vary from 0 ℃ to 70 ℃ and less than zero.3%FS in the whole allowable working temperature range.
With reverse safety, present limiting protection circuit, within the installation of constructive and unfavorable polarity connection is not going to injury the transmitter, abnormal transmitter will routinely limit the current within 35MA.
Solid structure, no moving components, high reliability, long service life.
Easy to install, easy construction, economic and sturdy.
Tuning fork degree sensor
The tuning fork degree meter is a liquid point level switching tool designed using the tuning fork principle. The working principle of the switch is to trigger 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 scale, mass, form, and force of the object. A typical example of the resonant frequency of an object is: the identical glass is continuously filled with water of different heights and tapped to carry out instrumental music.
Advantages: may be truly independent of move, bubbles, type of liquid, and so forth. No calibration is required.
Disadvantage: can’t 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 strain within the detection tube will increase until the microswitch is activated. As the extent drops, the air strain additionally drops and the switch opens.
Diaphragm liquid level sensor picture
Advantages: The tank doesn’t require electricity, can be used with a selection of liquids, and the change doesn’t come into contact with the liquid.
Disadvantages: upkeep is required over time because it is a mechanical device.
Float water degree sensor
Float stage switches are the original stage sensors. They are mechanical devices. A hole float is connected to the arm. As the float rises and falls in the liquid, the arm might be pushed up and down. The arm could be connected to a magnetic or mechanical swap to determine on/off, or to a degree gauge that can go from full to empty as the extent drops.
Float switches for water pumps are a price effective way to measure water levels in basement pumping pits.
Float water stage sensor picture
Advantages: Float switches can measure any sort of liquid and can be designed to operate without any energy supply.
Disadvantages: They are larger than other types of switches, and because they’re mechanical, they have to be used more incessantly than other stage switches.
Ultrasonic liquid degree sensor
The ultrasonic degree meter is a digital level meter managed 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 distance to the liquid floor.
Ultrasonic liquid level sensor image
Ultrasonic water stage sensor works on the precept that the ultrasonic transducer (probe) emits high-frequency pulse sound waves when it encounters the measured stage (object) surface, is reflected, and the mirrored echo is acquired by the sensor. Transducer and converted into an electrical signal. 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 can be expressed in the formulation: S = C × T / 2.
Advantages: non-contact measurement, the measured medium is kind of limitless, and could be broadly used to measure the peak of various liquids and strong materials.
Disadvantages: the measurement accuracy is affected by the present ambient temperature and mud.
Radar level gauge
Radar level gauge is a level measurement instrument based mostly on the time journey principle. The radar wave travels at the pace of sunshine and the travel time may be transformed right into a stage sign by digital components. The probe emits high frequency pulses touring on the pace of light in house. When the pulses encounter the floor of the fabric, they’re reflected and received by the receiver inside the instrument, changing the gap sign right into a level sign.
Radar level gauge picture
Advantages: wide selection of utility, unaffected by temperature, dust, steam, etc.
Disadvantages: simple to generate interference echoes, affecting the measurement accuracy.
Conclusion
In many industrial applications, one of many necessary components of course of control is knowing how a lot gas or liquid is current in a given vessel. There is a necessity to guarantee that the fill degree of a given substance does not overflow. Therefore, level measurement transmitters play an necessary role in monitoring the liquid level of a vessel, container or tank. For further questions or requirements please contact our skilled engineers..