ESL042 Geothermal Water Level Transmitter


ESL042 Geothermal Water Level Transmitter | Submersible Sensor

ESL042 line is heat-resistant liquid level transmitter. Featuring high reliability, stability and accuracy, the product is mainly used for the measurement of high-temperature liquid. This product line adopts 1Cr18Ni9Ti stainless steel construction, active sensing element of international brands, and the specially designed V/I converting circuit. It is easy to perform zero/span trim. Based on the locations, different high-strength breathable cables featuring wear-proof, acid/alkali resistance and oil resistance can be configured. Non-polarized two-wire output and DC-AC three-wire output available.


  • Pressure type: Gauge Pressure
  • Range: From0~1…500mH2O
  • Accuracy: ±0.25%F.S, ±0.5%F.S
  • Stability: 0.15%F.S/Year (typical), 0.25%F.S/Year (maximum)
  • Customized working temperature: -20℃~120℃
  • Signal Output: 4~20mA, 0/1~5V, 0~10V
  • Power supply: 10/11~30V, 8~24V
  • Diffused silicon-oil fill system
  • Ingress Protection: IP68
  • OEM: Available
RangeOverloadPrecisionStabilityWorking TemperatureInsulationElectric Strength
0~1...500mH2O1.5 times±0.25~±0.5%F.S0.15/0.25%F.S/Y-20~100℃>100MΩ@50V500V@60second
Two wireThree wireThree wireThree wire
Output Signal4~20mA0~5Vdc1~5Vdc0~10Vdc
Power Supply10~30Vdc8~24Vdc8~24Vdc11~30Vdc/ac
Load Resistance(U-10)/0.02(Ω)>100kΩ>100kΩ>100kΩ


Geothermal water measurement | Geothermal water in taking | Cooling water detection of thermal power plant | Thermal boiler | Hydrology detection | Power units | Hydropower


The probe measures liquid levels, basing on a simple relationship between the height of the liquid column and the resulting hydrostatic pressure. The pressure measurement is carried out on the level of separating diaphragm of the immersed probe and is related to atmospheric pressure through a capillary in the cable.

The active sensing element is a piezoresistant silicon sensor separated from the medium by an isolating diaphragm. The electronic amplifier, which words in combination with the sensor, and is meat to standardize the signal, is additionally equipped with an overvoltage protection circuit, which protects the probe from damage caused by induced interference from atmospheric discharges or from associated heavy current engineering appliance.

ESL042 Geothermal Water Level Transmitter drawing

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  • General Instruction and Datasheet-ESL042 GID-3-EV02