instrumentation & monitoring

Instrumentation > Instruments > Water > Vibrating Wire Piezometer

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 Standard Vibrating Wire Piezometer provides accurate measurement of pore water pressures in fully or partially saturated soil.

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
Product Benefits
Over 30 years of expertise in the design and manufacture of Vibrating Wire instrument technology
Accurate, repeatable readings over long cable lengths
Long working life, long term stability and reliability
Fast response to pressure changes
Design prevents case stresses from affecting readings
Over-voltage surge arrestor protects against electrical damage
Connecting cable is strong, screened and flexible

The Standard Vibrating Wire Piezometer is designed for the accurate measurement of pore water pressures in fully or partially saturated soil.

The piezometer tip has an integral porous filter element containing a diaphragm type Vibrating Wire pressure transducer. A cable connects the transducer to a read-out, terminal unit or data logger.

The readout can display either frequency based units, or on inputting the instrument calibration factor, it can also display engineering units.


Piezometers are used in geotechnical, environmental, and hydrological applications. They can be installed in boreholes, placed in fill materials or open wells to measure water levels or pore water pressures to enable engineers to verify design assumptions and control placement of fill. With a nose cone fitted the piezometer can also be pushed  into soft ground with a CPT rig.

Typical applications include:
Environmental management including landfill sites
Monitoring of aquifers
Monitoring of tidal effects on coastal soils
Potential landslide sites
Dewatering excavations
Tailings lagoons
Pumping tests
Monitoring seepage
Control placement of fill.