The cell consists of a Vibrating Wire Transducer with an integral water chamber. A pair of nylon tubes and an armoured cable extends from the cell to a readout terminal located on stable ground. The nylon tubes are filled with water and connected, at one end, to a datum pot and at the other end to the transducer chamber. The cable connects the transducer to a terminal panel. Vertical movement of the cell relative to its readout location results in a change in liquid pressure within the chamber.

To measure the pressure change and hence the amount of settlement or heave, a Vibrating Wire Readout/Logger provides a direct reading of fluid pressure acting on the cell. The pressure is displayed in metres of water and can then be recorded for comparison with previously recorded data.

Reliable, simple to install and read.
Large operating range.
Measurements can be made beneath concrete and earth structures at locations inaccessible to other types of instruments.
No vertical rods or tubes to interfere with construction.
Unaffected by lateral movements.
Twin liquid lines allow for re-circulation of water through the system after installation and insitu calibration test if required.
Portable readout unit can be used in conjunction with other Vibrating Wire instruments.

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