Piezometers are designed to measure fluid pressures, such as ground water elevations and pore pressures, when buried in embankments, fills, inside boreholes, wells and riser pipes. Vibrating Wire (VW) Piezometers contain a high tensile steel wire with a fixed anchor at one end and are attached to a diaphragm in contact with water pressure at the other end. The wire is electrically plucked, with the resonant frequency of the vibration proportional to the tension in the wire. This frequency induces and alternating current in a coil which is detected by a readout unit, and can then be converted to a pressure. The frequency output is immune to external electrical noise.