Piezometers are used to measure ground water elevations and pore water pressures in bore holes, dams, embankments, concrete structures, pipe- lines, wells, mines, tunnels etc. It has a stainless steel pressure sensitive diaphragm with a tensioned steel wire. The VW piezometers convert water pressure on the diaphragm to be measured into an equivalent frequency signal. The pressure on the diaphragm changed by fluid pressure causes a change in tension of the wire. The wire excited by the plucking vibrates at its resonant frequency. The frequency signal transmitted through a cable to the readout unit.

 

Specifications
Model: 1801V-P-XX (Specify)
Sensor Type: Vibrating wire
Sensor range: 20MPa
Resolution: 0.02% F.S.
Accuracy: ±0.1% F.S.
Cable: 4-wire, shielded, polyurethane jacket
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PIEZOMETER (VW)

A Casagrande Standpipe Piezometer along with water level meter  is used to measure water level and artesian heads in embankments and foundations and reservoir, uplift pressure in hill side highways and underground works.

The Casagrande Standpipe Piezometer of PMT consists of a porous tip, attached to a riser pipe. The Porous tip is isolated in the zone of interest, usually with an overlying bentonite seal. Water is free to flow through the porous tip stabilizes in the riser pipe at the piezometric elevation. This elevation of the water level in the riser is measured using water level meter.

Specifications
Model: 4201V-P-CS
Porous Tube:
Casgrande Tip: 37mm (OD), 25mm (ID), 60cm (L)
Standpipe: 20mm (OD), 1.75mm (WT), 3m (L)
Dip Meter:
Length (L): 25, 50, 100, 150, 200, 300m
Resolution: 1mm or 10mm
Tape material: Fiberglass reinforced tape jacket
Probe: Stainless Steel
Power Supply: 9 VDC supply
Audio Signal: Sound Buzzer
Visual Signal: LED light
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PIEZOMETER (CASAGRANDE STANDPIPE)