Table of Contents
What is water level sensor?
How does the water level sensor work?
Where to use water degree sensors?
What are the advantages of water stage sensors?
What are the kinds of water stage sensors?
Magnetic flap degree gauge
Optical water stage sensor
Capacitance liquid degree sensor
Hydrostatic stage transmitter
Tuning fork degree sensor
Diaphragm liquid degree sensor
Float water level sensor
Ultrasonic liquid stage sensor
Radar stage gauge
Conclusion
What is water degree sensor?
Water stage sensor is a device that measures the high or low degree of a liquid in a fixed vessel. According to the method of liquid level measurement, there are two forms of contact and non-contact. What we name enter water stage transmitter is a contact measurement, which converts the peak of liquid stage into electrical signal output. It is a extensively used water stage transmitter at current.
Various degree sensors
How does the water stage sensor work?
The working precept of the water level sensor is that when it is placed into the liquid to be measured at a certain depth, the pressure on the front 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 floor pressure, ρ is the density of the liquid to be measured, g is the local acceleration of gravity, Po is the atmospheric stress on the surface of the liquid, and H is the depth of the sensor dropped into the liquid.
Where to use water level sensors?
Uses of water level sensors include the next applications.
Water stage measurement in pools and tanks
Water degree measurement in rivers and lakes
Marine water stage measurement
Level measurement of acid and alkaline liquids
Oil stage measurement of oil vehicles and mailboxes
Swimming pool water stage management
Tsunami warning and sea stage monitoring
Cooling tower water level control
Sewage pump water degree management
Liquid stage remote monitoring
What are the advantages of water level sensors?
Simple construction: no movable or elastic elements, extraordinarily dependable, no common maintenance during use. Simple and simple to function.
Easy set up: When utilizing, first connect one end of the wire appropriately, then put the opposite end of the water degree probe into the answer to be measured.
Range elective: It can measure the water level within the vary of 1-200 meters, and other measurement ranges can additionally be customized.
Wide range of utility: It is suitable for liquid level measurement of high temperature and strain, strong corrosion, high pollution and other 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 extensive, not affected by the blistering, deposition and electrical traits of the measured medium.
Long service life: basic liquid stage sensor can be used in a traditional environment for 4-5 years, in a harsh setting can be used for 2-3 years.
Powerful: may be immediately connected to the digital show desk real-time show values, can be related to quite lots of controllers to set the higher and decrease limits to regulate the quantity of water within the container.
Accurate measurement: built-in high-quality sensors, excessive sensitivity, fast response time, accurately mirror the subtle adjustments within the move or static liquid degree, high measurement accuracy.
Various types: The liquid level sensor has various structure designs corresponding to input sort, straight rod sort, flange type, threaded sort, induction kind, screw-in sort, float sort, and so on. It can meet the measurement wants of assorted locations.
What are the types 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 stage gauge (also known as magnetic float level gauge) primarily based on the buoyancy precept and magnetic coupling developed. When the liquid level within the measured container rises and falls, the magnetic float within the body tube of the level gauge additionally rises and falls. The permanent magnetic steel 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 level rises, the flip column modifications from white to red, and when the liquid degree drops, the flip column modifications from red to white. pressure gauge octa and white junction of the indicator is the precise top of the liquid stage contained in the container, so as to understand a clear indication of the liquid degree.
Magnetic flap level gauge image
Characteristics:
Wide vary of application, set up of various varieties, appropriate for any medium degree, interface measurement.
The measured medium is completely isolated from the indicating construction, with good sealing performance, leakproof, and high reliability for liquid stage measurement underneath excessive pressure, high temperature and corrosion circumstances.
Set subject indication, remote transmission, alarm management about one and may be adjusted freely, totally functional dual-color indication with luminous, continuous and intuitive, eye-catching, giant measurement range, observation course could be arbitrarily changed.
Good vibration resistance, can adapt to the state of affairs of liquid degree fluctuation simple structure, convenient installation, low upkeep cost.
With nice magnetic metal corrector, 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 light escapes, causing the output to vary. 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 useful in situations the place adjustments in condition have to be recorded shortly and reliably, and where they’ll operate reliably for lengthy durations without maintenance.
Optical water level sensor image
Advantages: non-contact measurement, high accuracy, fast response time.
Disadvantages: Do not use in direct sunlight, water vapor will affect 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 within the liquid, it completes the circuit.
Capacitance liquid degree 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 identical 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 should be recorded, and the level is then displayed utilizing 0% and 100 percent calibration meters.
Disadvantage: Corrosion of the electrodes will change the capacitance of the electrodes and require cleansing or recalibration.
Hydrostatic stage transmitter
Hydrostatic degree meter is based on the principle that the static strain of the measured liquid is proportional to the height of that liquid, and uses an isolated diffusion silicon delicate factor or ceramic capacitive strain sensitive sensor with glorious performance to convert the static pressure into an electrical signal, which is then converted into a standard electrical signal (generally 4-20mA/1-5VDC) after temperature compensation and linearity correction.
Hydrostatic stage transmitter picture
Characteristics
Good stability, full degree, zero long-term stability up to 0.1%FS/ yr. 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 whole allowable working temperature vary.
With reverse protection, present limiting protection circuit, in the installation of optimistic and negative polarity connection is not going to harm the transmitter, irregular transmitter will mechanically restrict the present within 35MA.
Solid structure, no transferring elements, high reliability, long service life.
Easy to install, easy construction, financial and durable.
Tuning fork stage sensor
The tuning fork level meter is a liquid point degree switching device designed utilizing the tuning fork precept. The working precept of the change 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 scale, mass, form, and drive of the object. A typical instance of the resonant frequency of an object is: the identical glass is constantly filled with water of different heights and tapped to carry out instrumental music.
Advantages: can be truly 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 degree switches rely on air stress to push the diaphragm, which engages a microswitch inside the physique of the device. As the extent will increase, the pressure in the detection tube will increase till the microswitch is activated. As the level drops, the air strain additionally drops and the switch opens.
Diaphragm liquid stage sensor picture
Advantages: The tank doesn’t require electrical energy, can be used with a variety of liquids, and the switch doesn’t come into contact with the liquid.
Disadvantages: maintenance is required over time as a result of it’s a mechanical device.
Float water degree sensor
Float degree switches are the original level sensors. They are mechanical gadgets. A hole float is hooked up to the arm. As the float rises and falls in the liquid, the arm might be pushed up and down. The arm can be related to a magnetic or mechanical switch to determine on/off, or to a level gauge that can go from full to empty as the extent drops.
Float switches for water pumps are a price effective method to measure water levels in basement pumping pits.
Float water degree sensor picture
Advantages: Float switches can measure any type of liquid and may be designed to function with none power supply.
Disadvantages: They are bigger than different types of switches, and because they’re mechanical, they have to be used extra frequently than different degree switches.
Ultrasonic liquid degree sensor
The ultrasonic level 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 mirrored by the liquid degree and received by the same 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 gap 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 degree (object) surface, is mirrored, and the reflected echo is acquired by the sensor. Transducer and converted 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 can be expressed in the formulation: S = C × T / 2.
Advantages: non-contact measurement, the measured medium is kind of unlimited, and could be widely used to measure the peak of various liquids and solid supplies.
Disadvantages: the measurement accuracy is affected by the present ambient temperature and dirt.
Radar stage gauge
Radar degree gauge is a degree measurement instrument based on the time travel precept. The radar wave travels at the pace of light and the journey time can be converted right into a level signal by electronic elements. The probe emits high frequency pulses touring on the pace of light in house. When the pulses encounter the surface of the material, they’re reflected and obtained by the receiver inside the instrument, changing the space signal into a level signal.
Radar degree gauge image
Advantages: big selection of software, unaffected by temperature, mud, steam, etc.
Disadvantages: straightforward to generate interference echoes, affecting the measurement accuracy.
Conclusion
In many industrial applications, one of the necessary elements of process control is understanding how much gas or liquid is present in a given vessel. There is a need to make certain that the fill level of a given substance doesn’t overflow. Therefore, stage measurement transmitters play an necessary function in monitoring the liquid stage of a vessel, container or tank. For additional questions or necessities please contact our professional 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 degree sensors?
What are the advantages of water stage sensors?
What are the types of water stage sensors?
Magnetic flap stage gauge
Optical water degree sensor
Capacitance liquid degree sensor
Hydrostatic stage transmitter
Tuning fork level sensor
Diaphragm liquid degree sensor
Float water level sensor
Ultrasonic liquid stage sensor
Radar degree gauge
Conclusion
What is water stage sensor?
Water degree sensor is a tool that measures the high or low stage of a liquid in a onerous and fast vessel. According to the strategy of liquid level measurement, there are two types of contact and non-contact. What we name input water level transmitter is a contact measurement, which converts the height of liquid degree into electrical signal output. It is a widely used water degree transmitter at current.
Various degree sensors
How does the water stage 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 pressure on the entrance surface of the sensor is transformed into the liquid level top. The calculation formulation is Ρ=ρ.g.H+Po, the place P is the sensor surface pressure, ρ is the density of the liquid to be measured, g is the local acceleration of gravity, Po is the atmospheric stress 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 embrace the next functions.
Water stage measurement in pools and tanks
Water level measurement in rivers and lakes
Marine water stage measurement
Level measurement of acid and alkaline liquids
Oil level measurement of oil vehicles and mailboxes
Swimming pool water stage management
Tsunami warning and sea level monitoring
Cooling tower water level management
Sewage pump water degree control
Liquid stage remote monitoring
What are the benefits of water level sensors?
Simple construction: no movable or elastic parts, extremely reliable, no common upkeep throughout use. Simple and simple to function.
Easy set up: When utilizing, first connect one end of the wire accurately, then put the other finish of the water degree probe into the answer to be measured.
Range elective: It can measure the water degree throughout the range of 1-200 meters, and different measurement ranges can be customized.
Wide range of utility: It is appropriate for liquid degree measurement of excessive temperature and strain, strong corrosion, excessive air pollution and other media.
Wide range of measuring medium: from water, oil to excessive viscosity paste can be measured with high accuracy, and the temperature compensation vary is extensive, not affected by the blistering, deposition and electrical characteristics of the measured medium.
Long service life: common liquid stage sensor can be utilized in a traditional setting for 4-5 years, in a harsh surroundings can also be used for 2-3 years.
Powerful: can be immediately linked to the digital display table real-time show values, can be related to a wide selection of controllers to set the higher and decrease limits to control the amount of water within the container.
Accurate measurement: built-in high-quality sensors, high sensitivity, fast response time, precisely replicate the refined changes within the move or static liquid degree, excessive measurement accuracy.
Various types: The liquid level sensor has varied construction designs such as input kind, straight rod type, flange kind, threaded type, induction kind, screw-in kind, float sort, and so forth. It can meet the measurement wants of assorted places.
What are the kinds of water level sensors?
Here are 9 forms of liquid level sensors for your reference.
Display of assorted liquid level sensors
Magnetic flap stage gauge
Magnetic flip degree gauge (also known as magnetic float level gauge) based on the buoyancy precept and magnetic coupling developed. When the liquid degree within the measured container rises and falls, the magnetic float within the physique tube of the extent gauge additionally 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 pink and white flip column to turn 180°. When the liquid stage rises, the flip column adjustments from white to pink, and when the liquid stage drops, the flip column modifications from pink to white. The red and white junction of the indicator is the precise peak of the liquid degree contained in the container, so as to realize a clear indication of the liquid degree.
Magnetic flap stage gauge picture
Characteristics:
Wide range of software, set up of assorted forms, suitable for any medium degree, interface measurement.
The measured medium is totally isolated from the indicating structure, with good sealing performance, leakproof, and excessive reliability for liquid degree measurement under excessive strain, excessive temperature and corrosion situations.
Set subject indication, remote transmission, alarm control about one and may be adjusted freely, fully functional dual-color indication with luminous, steady and intuitive, eye-catching, massive measurement vary, observation course may be arbitrarily modified.
Good vibration resistance, can adapt to the scenario of liquid stage fluctuation easy structure, convenient set up, low maintenance value.
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 mild escapes, inflicting the output to change. These sensors can detect the presence or absence of virtually any liquid. They are insensitive to ambient light, unaffected by bubbles in air, and unaffected by small air bubbles in liquids. ไดอะแฟรม makes them useful in conditions where modifications in situation should be recorded rapidly and reliably, and the place they can function reliably for lengthy intervals with out maintenance.
Optical water stage sensor image
Advantages: non-contact measurement, excessive accuracy, quick response time.
Disadvantages: Do not use in direct daylight, water vapor will affect the measurement accuracy.
Capacitance liquid stage sensor
Capacitive level switches use 2 conductive electrodes (usually made from metal) in a circuit with a short distance between them. When the electrodes are immersed within the liquid, it completes the circuit.
Capacitance liquid degree 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 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 extent 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 degree transmitter
Hydrostatic degree meter relies on the precept that the static stress of the measured liquid is proportional to the peak of that liquid, and makes use of an isolated diffusion silicon sensitive factor or ceramic capacitive stress sensitive sensor with wonderful efficiency to convert the static pressure into an electrical sign, which is then transformed 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 zero.1%FS/ 12 months. The temperature drift is lower than 0.1%FS in the compensation temperature range from zero ℃ 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 positive and negative polarity connection is not going to injury the transmitter, abnormal transmitter will automatically limit the current within 35MA.
Solid construction, no moving parts, excessive reliability, lengthy service life.
Easy to install, simple construction, financial and sturdy.
Tuning fork level sensor
The tuning fork level meter is a liquid point stage switching device designed using the tuning fork principle. The working principle of the swap is to trigger its vibration by the resonance of a piezoelectric crystal.
Tuning fork level sensor picture
Every object has its resonant frequency. The resonant frequency of an object is expounded to the size, mass, form, and drive of the object. A typical example of the resonant frequency of an object is: the identical glass is continuously crammed with water of different heights and tapped to perform instrumental music.
Advantages: could be truly unbiased of circulate, bubbles, sort of liquid, and so forth. No calibration is required.
Disadvantage: cannot be used for viscous media.
Diaphragm liquid level sensor
Diaphragm or pneumatic stage switches depend on air stress to push the diaphragm, which engages a microswitch inside the physique of the gadget. As the extent will increase, the pressure within the detection tube will increase till the microswitch is activated. As the extent drops, the air stress additionally drops and the change opens.
Diaphragm liquid stage sensor picture
Advantages: The tank doesn’t require electricity, can be utilized with a big selection of liquids, and the change does not come into contact with the liquid.
Disadvantages: upkeep is required over time because it’s a mechanical device.
Float water degree sensor
Float level switches are the original level sensors. They are mechanical units. A hollow float is hooked up to the arm. As the float rises and falls within the liquid, the arm might be pushed up and down. The arm could be connected to a magnetic or mechanical change to discover out 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 value effective method to measure water ranges in basement pumping pits.
Float water degree sensor image
Advantages: Float switches can measure any kind of liquid and can be designed to operate without any energy source.
Disadvantages: They are bigger than different kinds of switches, and since they are mechanical, they should be used more frequently than different level switches.
Ultrasonic liquid stage 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 degree 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 gap to the liquid surface.
Ultrasonic liquid stage sensor picture
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 reflected echo is obtained by the sensor. Transducer and transformed into an electrical signal. The propagation time of the sound wave. It is proportional to the gap of the sound wave to the surface of the object. Sound wave propagation distance S with the velocity of sound C and sound propagation time T can be expressed within the method: S = C × T / 2.
Advantages: non-contact measurement, the measured medium is nearly unlimited, and could be extensively used to measure the height of assorted liquids and stable materials.
Disadvantages: the measurement accuracy is affected by the present ambient temperature and mud.
Radar stage gauge
Radar degree gauge is a level measurement instrument primarily based on the time journey principle. The radar wave travels on the pace of sunshine and the journey time could be converted into a degree sign by digital components. The probe emits high frequency pulses touring at the pace of sunshine in space. When the pulses encounter the floor of the material, they’re reflected and acquired by the receiver contained in the instrument, converting the distance sign into a degree signal.
Radar level gauge image
Advantages: big selection of utility, unaffected by temperature, mud, steam, etc.
Disadvantages: easy to generate interference echoes, affecting the measurement accuracy.
Conclusion
In many industrial applications, one of the essential parts of process management is knowing how much 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, degree measurement transmitters play an essential role in monitoring the liquid stage of a vessel, container or tank. For additional questions or requirements please contact our skilled engineers..