Innovative series IG-1400/1500 piezometers are used to measure ground water elevations and pore water pressures in bore holes, embankments, concrete structures, pipe- lines, wells, mines, tunnels etc. Model IG-1501 has the filter replaced with a threaded adapter to permit it to be coupled directly to pressure lines. Provision of gas discharge tube protects the sensor against surge and lightning.

Typical Applications

• Controlling water pressure during consolidation by continuous monitoring.
• Prediction of slope failure and remediation.
• Design for lateral earth pressures.
• Design for uplift pressures and buoyancy.
• Monitor seepage, determine phreatic line and verify models of flow.
• Monitor surface water run-off.
• Monitor rate and direction of flow of contaminated water.
• Monitor encroachment of salt water into fresh water acquifiers.

Outstanding features

• Unprecedented sensitivity, long term stability and reliability.
• Isolation of the sensor assembly from the effects of total stresses acting on the body of the piezometer.
• Robust and sturdy construction.
• Slim-line design.
• Corrosion resistant option available for coastal applications.
• Provision of thermistor for temperature measurement.
• Provision of gas discharge tube for lightening and surge protection.
• Suitable for remote reading, scanning and Data logging.
• No effect of cable length on performance of the sensor.

Push-In type Displacement Transducer/ Crack meter Model IG-2002 & Perimetric Joint meter Model IG-2002 XYZ

The model IG2002 crackmeter consists of a spring loaded, compression type vibrating wire displacement transducer and two installation brackets. One mounting bracket supports the displacement transducer while the other is anchored across the joint on to the reference surface. The springloaded shaft of the displacement transducer is always in contact with the reference surface at the other side of the crack. The sliding rod senses the movement between the two anchors and gives a frequency output which is read by the indicator.

For measurement in three orthogonal directions IG2002XYZ or perimetric joint meter is used. This version has three sets of displacement transducer assemblies installed across the crack in three mutually perpendicular directions. Free movement of the sliding shaft in all directions ensures accuracy of measurement.

Piezometer : Water level gauge Model IG 1402 with 20m integral cable and vent tube

Model IG-1402 Automatic Water Level Recorder is designed for accurate, remote monitoring of ground water level in a reservoir/ borehole, coastal and inland waters, ports, wells and rivers. It can also be used for recording water level in canals, open channels, sumps and underground and overhead tanks/ sumps.

It essentially consists of a vibrating wire pressure sensor provided with a vent tube of required length running parallel to the sensor cable. The vent tube and cable are routed through a protective tube to a Digital read out unit, for displaying the water level in its engineering units. A special cylindrical filter with conical tip is provided to give more surface area to the sensor. The filter is fixed on to the sensor body through a threaded connector which may easily be removed for saturation. Option of disc filter is also available.

Outstanding features

Unprecedented sensitivity, long term stability and reliability.

Isolation of the sensor assembly from the effects of total stresses acting on the body of the piezometer.

• Robust and sturdy construction.
• Slim-line design.
• Corrosion resistant option available for coastal applications.
• Provision of thermistor for temperature measurement.
• Provision of gas discharge tube for lightening and surge protection.
• Suitable for remote reading, scanning and Data logging.
• No effect of cable length on performance of the sensor.