This product is no longer available and has been replaced by: CS456,CS451. Some accessories, replacement parts, or services may still be available.
CS431-L Water Level and Temperature Sensor
Services Available
Repair No
Calibration No
Free Support No

Visão Geral

The CS431 is a pressure transducer manufactured for use with Campbell Scientific data loggers. It measures both water level and water temperature in canals, wells, ponds, harbors, lakes, streams and tanks. Campbell Scientific data loggers measure the sensor's output and then converts the measured value to the desired units.

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Benefícios e Características

  • Compatible with most Campbell Scientific data loggers
  • Enhanced temperature calibration available (see Ordering Info)
  • Stainless-steel body and Viton and Teflon wire seals resist corrosion
  • Double-sealed cable harness protects the cable jacket and reduces the possibility of leakage
  • End cone is interchangeable with an NPT inlet allowing easy hookup and field calibration


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Descrição Técnica

The CS431 uses piezoresistive strain gage technology to measure water level and an on-board thermistor to measure temperature. Piezoresistive transducers include a strain gage bonded to a pressure-sensitive diaphragm. Electrical resistance changes as pressure changes on the diaphragm.

The CS431 has a 316 stainless steel body and Viton® and Teflon® wire seals that resist corrosion. Its double-sealed, cable harness protects the cable jacket and reduces the possibility of leakage. The end cone is interchangeable with a ¼” NPT inlet allowing easy hookup and field calibration. You can choose a polyurethane or Teflon cable (see Ordering Info). Both cable options are vented.


Available Pressure Ranges 5, 10, 30, 50, 100 psi
Pressure Measurement Repeatability ±0.1% FSO (typical)
Pressure Measurement Linearity ±0.1% FSO, (typical)
Typical Output Voltage Sensitivity 15 to 16 mV/V (at 20°C)
Typical Bridge Resistance 4 kohm (at 20°C)
Typical Excitation Voltage 0.8 V
Compensated Temperature 0° to 40°C
Operating Temperature -5° to +70°C
Diameter 2.13 cm (0.84 in.)
Maximum Cable Length 609.6 m (2000 ft)
Length 27.31 cm (10.75 in.)
Weight 1.4 kg (3 lb) with 15.24-m (50-ft) cable

Temperature Error

Standard Calibration (-SC) ±2.0% FSO (0° to 40°C)
Enhanced Calibration (-XC) ±0.2% FSO (0° to 40°C)


Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.

Data Loggers

Product Compatible Note
21X (retired)
CR10 (retired)
CR1000 (retired)
CR10X (retired)
CR200X (retired)
CR206X (retired)
CR211X (retired)
CR216X (retired)
CR23X (retired)
CR295X (retired)
CR500 (retired)
CR5000 (retired)
CR510 (retired)
CR9000 (retired)
CR9000X (retired)

Additional Compatibility Information

Data Logger Considerations

The pressure measurement requires two differential channels and one excitation channel, and the temperature measurement requires one single-ended channel and one excitation channel. The CR500 and CR510 do not have sufficient channels to measure both pressure and temperature.

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