The Vibrating Wire Pressure Cell is used to measure total pressure, particularly in earth or rockfill structures. The cells are normally used to validate design assumptions and to give adequate warning of soil pressures in excess of those which a structure is designed to withstand. The VW Pressure Cell has two designs; the double face design is formed from a circular flat cell comprising two flexible plates of Stainless Steel welded together around their periphery, providing two active faces, the single face design has one thick metal plate and one flexing plate, providing one active face. A narrow gap is formed between the plates and is filled with highly de-aired hydraulic oil, a Vibrating Wire pressure transducer is connected to the cell by a short length of steel tubing forming a closed hydraulic system.

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