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GT3-420 Jet fill Tensiometer Transducers

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.

The GT3-420 has an industry-standard 4 to 20mA current loop output that can be used to interface it to a wide variety of standard devices including programmable logic controllers (PLCs) and data loggers.

Ordering Information

GT3-420

Transducer with 1/4 inch NPT thread, 1 m cable

Note: Customers requiring cable lengths greater than 1 m are requested to source cable locally. Standard 4 wire cable is required.

Links and Brochures
Download a printer-friendly version of GT3-420 Brochure (200K PDF)
GT3-1 0 to -7 kPa Custom Tensiometer Transducers Download a printer-friendly version of GT3-1 Brochure (200K PDF)
GT3-15 0 to -100 kPa Jet fill Tensiometer Transducers Download a printer-friendly version of GT3-15 Brochure (200K PDF)
GT3-30 -100 to 200 kPa Jet fill Tensiometer Transducers Download a printer-friendly version of GT3-30 Brochure (200K PDF)
GT3 Custom Tensiometer Transducers
Notes for Tensiometer & Pressure Transducer Interfaces
Soil Science Instrumentation
FieldStation
Irrigation Solutions