What Is a Water Level Transducer?
Water level transducers are also called Water Level Sensors, or water level transmitters. Water level transducers are used to monitor water usage and quality. The water level signal is output through 4-20mA and other signals, which is convenient for people to monitor the water level.
There are many types of water level transducers. Common ones are input type, ultrasonic, radar and so on.
Sino-Inst offer a wide range of solutions with various pressure ranges, cable lengths and output options.
For remote monitoring and recording of water level data in groundwater pumping and sludge testing, stormwater flood analysis and runoff, and surface water irrigation canals, streams and river measurements.
Featured water level transmitters for Sale
level transducer types
In various industrial production processes, many auxiliary safety products are used. Among them, level transducer, as one of the most common auxiliary products, has many names. The following are 20 common level transducers:
- Magnetic flap liquid level transducer
- Float level transducer
- Steel belt level transducer
- Radar level transmitter
- Magnetostrictive liquid level transducer
- RF Admittance Level Transducer
- Tuning Fork Level Meter
- Glass plate/glass tube level transducer
- Hydrostatic level transmitter
- pressure level transmitter
- Capacitive Level Transducer
- Intelligent electric displacer liquid level transducer
- Buoy Level Transducer
- Displacer Level Transmitter
- Electric contact level transducer
- Magnetic two-color electronic liquid level transducer
- External level transmitter
- Hydrostatic Level Transducer
- Ultrasonic Level Transducer
- Differential pressure level transmitter (double flange level transmitter)
Extended Reading: What is level transmitter working principle?
types of water level sensors
We can divide Water Level Sensors into two categories by measuring whether they are in contact with the water level.
One type is contact type. Including single flange static pressure/double flange differential pressure level transmitter, float type level transmitter, magnetic level transmitter, input type level transmitter, electric internal float level transmitter Sensors, electric float level transmitters, capacitive level transmitters, magnetostrictive level transmitters, service level transmitters, etc.
The second category is non-contact. Divided into the ultrasonic level transmitter, radar level transmitter, and so on.
Extended Reading: Chilled Water Flow Meter
Submersible level transmitter is a kind of Hydrostatic water pressure level transmitter. It is widely used for its simple installation and reasonable price. Providing quick, accurate and reliable level measurement.
Cable 0m ～ 300m, minimum range 0.5m.
Submersible Water Level Sensor Specifications
| Measurement form and range | 0～1～200mH2O |
| Overload allowed | 3 times full scale pressure |
| Operating temperature | -20～80℃ |
| Temperature compensation | -10～70℃ |
| Storage temperature | -40～80℃ |
| Accuracy (including nonlinearity, repeatability, hysteresis) | 0.2%FS(Typical) 0.5%FS(Maximum) |
| Stability error | 0.2%FS(Typical), 0.5%FS(Maximum) |
| Temperature drift coefficient | 0.01%FS (typical, range not less than 5mH2O) 0.03%FS (typical, less than 5mH2O) |
| Output signal | (4～20)mA, (0～10/20)mA (0～5)V, (1～5)V, )0～10)V |
| Power supply | 15～36 VDC (calibration voltage 24VDC) |
| Load (Ω) | Current output type<(U-15V)/0.02A, current output type>5K |
| Shell material | Stainless steel |
| O-ring | Fluorine rubber |
| Diaphragm | 316L stainless steel |
| Cable | Special waterproof and breathable cable |
| Protection class | IP68 (pressure sensor part), IP65 (junction box transmitter part) |
Radar sensor for water level is a level detection instrument using microwave technology. It is mainly suitable for detecting the water level of natural waters such as rivers and lakes. It can also be used for water level detection of large reservoirs, reservoirs, sewage canals and other open-air channels.
As a detection terminal, this product can effectively assist in monitoring the state of water level changes and provide accurate water level information for monitoring units.
The product adopts the pulse radar detection method, which can work stably around the clock. The measurement results are accurate and reliable.
The non-contact detection method makes its application range more extensive. It can even be used in complex water environments with organic pollutants or sediments.
Application: Rivers, Lakes, Shoal
Measuring Range: 70 meters
Process Connection: Thread G1½ A″ /Frame /Flange
Temperature: -40℃ ~ 100℃
Process Pressure: Normal pressure
Precision: ± 3mm; ± 10mm
Frequency Range: 26GHz
Protection Grade: IP67 / IP65
Power Supply: (6 – 24V) DC / Four-wire
24V DC / Two wire
The Signal output: RS485 / Modbus ( 6~24V DC)
4~20mA / Hart Two wire ( 24V DC)
The Scene Display: Optional
Outer Covering: Aluminum / Plastic / Single chamber
Extended reading: Amazing Solutions for Continuous Liquid Level Measurement
The principle of liquid level measurement of pressure sensor
In physics, the pressure P of a liquid is determined by the relationship: p=ρgh.
For the same liquid, the liquid density ρ is constant. Therefore, the pressure P of the liquid is linearly proportional to the height h of the liquid surface (the height from the liquid surface). It is not difficult to find that the pressure of the liquid at different heights of the liquid level is also different.
When the pressure sensor is used to measure the liquid level, the pressure sensor is installed at the bottom of the tank. When the liquid level in the tank changes, the height h from the tank bottom to the liquid level is also changing at the same time. The pressure will naturally change accordingly. Thus, the purpose of continuous measurement is achieved.
One of the advantages of using pressure sensors for liquid level measurement is non-contact. Compared with mechanical and static methods, when measuring, it does not require many parts to be in contact with the liquid, and the installation is relatively convenient.
In addition, in terms of measurement principle, compared with similar non-contact measurement methods such as laser and ultrasonic, the relationship between pressure sensor measurement principle is simpler and linear, and it is more intuitive in data processing, analysis and processing.
Extended reading: Float Switch Water Level Controller
How does a water level transducer work?
Water level transducer is an instrument that can convert the water level parameter of the measured point into the corresponding electric quantity signal in real time.
The working principle of the Water level transducer is that when it is put into a certain depth in the liquid to be measured. The pressure on the sensor’s front surface is converted into the liquid level height.
The calculation formula is Ρ=ρ.g.H+Po.
In the formula P is the pressure on the liquid surface of the sensor;
ρ is the density of the liquid to be measured;
g is the local acceleration of gravity;
Po is the atmospheric pressure on the liquid surface;
And H is the depth at which the sensor drops into the liquid.
Extended reading: How to convert a 4-20mA to 0-10V /1-5V signal?
industrial water level sensor advantages and disadvantages
At present, the Submersible Water Level Sensor is the most used one.
Submersible Water level transducers generally use the piezoresistive effect of diffused silicon or ceramic sensing elements. Convert static pressure into electrical signal. Temperature compensated and linearity corrected. Converted to 4-20mADC standard current signal output.
The Submersible Water level transducer is directly put into the liquid, and the transmitter part can be fixed by flange or bracket, which is extremely convenient to install and use.
The benefits of water level sensors
- Good stability and high precision;
- The Submersible Water Level Sensor is put directly into the measured medium. It is very convenient to install and use;
- Input type, straight rod type, flange type, threaded type, inductive type, screw-in type, floating ball structure design. Anti-blocking design is available.
- Simple installation, convenient use and strong interchangeability. High-quality level gauges have high sensitivity.
- The response speed is fast, and it accurately reflects the subtle changes of flowing or static liquid level.
- High measurement accuracy.
- Solid-state structure, no moving parts, high reliability.
- Long service life High-precision measurements are possible from water and oil to more viscous pastes.
- A wide range of temperature compensation is not affected by the foaming, deposition, and electrical properties of the measured medium.
- The Submersible Water Level Sensor has power reverse polarity protection and overload current limiting protection.
The disadvantages of Submersible Water Level Sensor are:
- The measurement signal needs to be converted;
- Cannot measure the temperature of high temperature medium over 125℃;
- The density of the measuring medium must be uniform.
These points also limit its scope of use. But for water level measurement, Submersible Water Level Sensor is the perfect choice.
Extended Reading: 3 inch (3″) Water Meter
water level sensor applications
Uses of water level sensors include the following applications:
- Water level measurement in pools and tanks
- River and lake water level measurement
- Marine level measurement
- Level measurement of acid and alkali liquids
- Oil level measurement of oil trucks and mailboxes
- Swimming pool water level control
- Tsunami Warning and Sea Level Monitoring
- Cooling tower water level control
- Sewage pump level control
- Liquid level remote monitoring
Extended reading: Sludge Blanket Level Detector Appliactions
digital water level recorder
Paperless Recorder is an intelligent Digital chart recorder. Data can be remotely recorded, analyzed, stored, and signal output. LCD color screen, maximum 16 channels.
R7100 series color paperless recorder supports 1-16 channels of universal input. R7100 has a powerful display function, real-time curve display, historical curve recall, bar graph display, alarm list display, power-down list display.
Configurable and optional inputs: standard voltage, standard current, thermocouple, thermal resistance, frequency, switch value, pulse, etc. It can be equipped with 6 relay alarm outputs, 6 feed outputs, 4 transmitter outputs, and RS232/485 communication interface is optional. Bluetooth function, GPRS function Ethernet interface, micro printer interface and USB interface.
Sino-Inst offers a variety of digital water level recorder instruments for industrial control. If you have any questions, please contact our sales engineers.
Frequently
Asked
Questions
Related Blogs
Sino-Inst offers over 10 Water Level Transducers About 50% of these are submersible liquid level meters, 40% is the others types.
A wide variety of Water Level Transducers for Liquid Level Measurement options are available to you, such as free samples, paid samples.
Sino-Inst is a globally recognized supplier and manufacturer of Water Level Transducers for Liquid Level Measurement instrumentation, located in China.
Request a Quote
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.