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Vibrating Wire Piezometer

The itmsoil Vibrating Wire Piezometer is designed for accurate and long term measurement of pore water pressures in fully or partially saturated soil and rock.

The transducer is made from high quality 316 grade stainless steel and designed to handle pressure ranges from -50 to 4000 kPa. It incorporates an over voltage surge arrestor that offers protection from a lightning strike

The piezometer may be fitted with either a low air entry sintered steel or high air entry ceramic filters. A coned nose piece is available for push in installations. An integral thermistor for temperature monitoring is included.

Product Features

•Small diameter
•Uses proven Vibrating Wire (VW) technology
•Manufactured from high grade 316 stainless steel for extended operation
•In-built temperature compensation
•Hermetically sealed
•Suitable for long-term monitoring
•No electronic components in sensor module
•Capable of measuring negative pore pressures to –50 kPa
•Fitted with thermistors for temperature monitoring

Ordering information
Low resistance to air entry (LAE), stainless steel sintered filter (50micron)
W9-30-SS-T 300kPa pressure range with thermistor
W9-50-SS-T 500kPa pressure range with thermistor
W9-70-SS-T 700kPa pressure range with thermistor
W9-100-SS-T 1000kPa pressure range with thermistor
W9-150-SS-T 1500kPa pressure range with thermistor
W9-200-SS-T 2000kPa pressure range with thermistor
W9-400-SS-T 4000kPa pressure range with thermistor


High air entry ceramic filter vibrating wire piezometer
High resistance to air entry (HAE), ceramic filter (1micron)
W9-30-H-T 300kPa pressure range with thermistor
W9-50-H-T 500kPa pressure range with thermistor
W9-70-H-T 700kPa pressure range with thermistor
W9-100-H-T 1000kPa pressure range with thermistor
W9-150-H-T 1500kPa pressure range with thermistor
W9-200-H-T 2000kPa pressure range with thermistor
W9-400-H-T 4000kPa pressure range with thermistor


Heavy Duty Push-In Piezometers
W9P-30-SS-T 300kPa pressure range
W9P-50-SS-T 500kPa pressure range
W9P-70-SS-T 700kPa pressure range
W9P-100-SS-T 1000kPa pressure range
W9P-150-SS-T 1500kPa pressure range
W9P-200-SS-T 2000kPa pressure range
W9P-400-SS-T 4000kPa pressure range