Vibratingwire piezometer is a device
used in geotechnical engineering for various critical tasks like measurement of
ground water elevation and pore water pressure. It is also deployed for
carrying out pump tests and for measuring uplift pressures in dam foundations.
The extreme water pressures that build up behind tunnel linings can also be
measured effectively using this device.
How It Works
The best quality vibrating wire load cell comes with a tough stainless steel
body and offers consistent surge protection. It is designed to offer highest
resistance to radio and electrical frequency interference.
The transducer of the piezometer makes use of a
diaphragm which has a vibrating wire element attached to it which is sensitive
to pressure. The diaphragm is welded to a hermetically sealed and evacuated
capsule.
The Measuring process
The
pressure exerted by fluid on the outer face of the diaphragm results in
deflections of the diaphragm which in turn results in difference in tension and
frequency of the vibrating wire. This frequency is analyzed and transmitted to
a device through an electrical coil. There is a readable device which records
the readings
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