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VW Piezometers


The Model 4500 Standard Piezometer is designed to measure fluid pressures such as ground water elevations and pore pressures when buried directly in embankments, fills, etc. Also for installation inside boreholes, observation wells and standard (>19 mm diameter) piezometer riser pipe. The Model 4500SH is designed with a heavy duty housing for pressures that exceed 3 MPa. The Model 4500AL is designed for low-pressure ranges. The vented version (ALV) provides automatic compensation for barometric pressure changes. Thermistors are included to measure temperatures.


Standard Ranges 4500S | −100 to 350, 700 kPa; 1, 2, 3 MPa
4500SH | −100 kPa to 5, 7.5, 10, 20 MPa
4500AL(V) | 70, 170 kPa
Over Range 2 × rated pressure
Resolution 0.025% F.S. (minimum)
Accuracy ±0.1% F.S.
Linearity <0.5% F.S. (±0.1% F.S. option available in some ranges)
Temperature Range¹ −20°C to +80°C
Length x Diameter 4500S | 133 × 19.1 mm
4500SH | 194 × 25.4 mm
4500AL(V) | 133 × 25.4 mm

¹High temperature versions available on request.
*Please Note: All Geokon vibrating wire piezometers include tripolar plasma surge arrestors to protect the sensor coils from possible lightning damage. Semiconductor piezometers are also available (see 3400 Series).