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GT3-30 4-20mA Tensiometer Transducer

The ICTGT3-30 sensor measures in the range of -100 to +200 kPa. This version has a 4-20mA output.

GT3-30 Tensiometer Transducer -100 to 200 kPa Features

  • Pressure and suction measurements (-100kPa to +200kPa)
  • Rapid response
  • Temperature compensated in the range 0–50°C — typical shift 0.5% full scale.
Range: -100kPa to +200kPa
Temperature shift: Temperature compensated in the range 0–50°C—typical shift 0.5% full scale.
Resolution: 0.1 kPa
Accuracy: ±1.0% span

Measuring Principle

The soil water tension is transmitted via the ceramic cup into the tensiometer. The vacuum inside the tensiometer is measured by a pressure transducer, which gives a continuous analogue output signal.

Resolution and Accuracy

A resolution of 0.1 kPa (1 cm H2O) can be attained for the GT3 Tensiometer Transducer.
The accuracy actually obtained is related to the calibration and resolution of the AD converter. In field applications the values obtained should consider the shaft/cup length of the tensiometer: 1 cm = 0.1 kPa.