The cell consists of a rectangular flat jack formed from 2 plates of steel welded together around the periphery. The narrow gap between the plates is filled with hydraulic oil. A vibrating wire pressure transducer is connected to the cell by a short length of steel tubing, forming a closed hydraulic system. Both cell and transducer are embedded in the medium to be monitored.

As the concrete or shotcrete cures the cell expands due to the rise in temperature. Upon cooling a slight gap between the cell and the concrete.

To correct for this a re-pressurisation tube is supplied with both the tangential and radial cell. This allows extra oil to be squeezed into the cell thus expanding it to form a firm bonding with the cooled concrete. This ensures fast and accurate response.

An armoured, screened cable connects the transducer to a terminal unit, a portable readout unit or a datalogger.

Robust, reliable with good long term stability.
Accuracy unaffected by cable length.
Transducer design prevents case stresses from affecting readings.
Connecting cable is strong, screened and flexible and can be used in lengths in excess of 1000m.
Low volume change and slender profile. Arching and stress concentrations are minimised.
Over voltage surge arrestor fitted to protect against electrical damage.
Suitable for remote reading, scanning and data logging.
Re-pressurising facility for restoring cell contact pressure.

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