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4-20mA Piezometer

The 4-20mA Piezometer is designed for accurately measuring pore water pressures in fully or partially saturated soil and rock.

The transducer is fitted with a sintered Stainless Steel filter disc and is available as a vented (gauge) piezometer or a non-vented (absolute) piezometer.

The Piezometer is built from high quality 316 grade Stainless Steel and is fitted with a thermistor for temperature monitoring.

The 4-20mA Piezometer is devised for pressure ranges from -50 to 3500 kPa.

Product Features

•Accurate with excellent long term stability
•Fitted with thermistor for temperature monitoring
•Fast response to pressure changes
•Advanced design prevents case stresses from affecting readings
•Capable of measuring negative pore pressures to -50 kPa (absolute non-vented unit)

Ordering Information
4-20mA Piezometer - Absolute Pressure Range

4-20mA Output 2-wire; 19mm outer diameter, sintered Stainless Steel filter disc (50micron) with customer specified length of cable.
Armoured cable to be joined using joint sealing kit CA-4.1
W12-10  75-125 kPa Barometer
W12-20  200kPa pressure range
W12-35  350kPa pressure range
W12-70  700kPa pressure range
W12-200  2000kPa pressure range
W12-340 3500kPa pressure range


4-20mA Vented Piezometer - Gauge Pressure Range
4-20mA Output 2-wire; 19mm outer diameter, sintered Stainless Steel filter disc (50micron) with customer specified length of vented cable.
Not compatible with armoured cable.
W12V-10  100kPa pressure range
W12V-20  200kPa pressure range
W12V-35  350kPa pressure range
W12V-70  700kPa pressure range
W12V-200  2000kPa pressure range
W12V-340 3500kPa pressure range


Connecting Cables and Fittings
CA-3.1-4-IC Instrument cable, 4 core, 7/0.20, screened; Polyurethane jacket, priced per metre
CA-1.1-4-A Armoured cable, 4 cores; 1.5mm², PVC jacket, for instruments with thermistors, priced per metre
CA-3.3-4-V Vented cable, 4 cores, 0.22, screened; PVC jacket, priced per metre
W12-MT-VC Moisture trap for 4-20mA Vented Piezometer
W10-2.1 Spare desiccant tablets for moisture trap; set of 20No.
CA-4.1 Joint sealing kit, not for use with vented cables
CA-4.2 Coloured adhesive tapes; set of 10No.
CA-4.3 Crimping tool
CA-4.4 Crimping sleeves; set of 100 No.
W6-6.1 Nylon ties; 150mm x 3.5mm, pack of 100No.
ST1-3.5 Nylon ties; 370mm x 4.7mm, pack of 100No.