A Novel Hydraulic Pressure (Capacitive) Gauge

摘要

The dielectric behaviour of a composite of lead magnesium niobate, lead titanate and lead magnesium tungstate ferroelectric, having different compositions, has been investigated as a function of pressure and temperature. This study reveals that this material can be used as a capacitive pressure gauge in the range 0.1 to 415 MPa to measure the pressure within full scale accuracy of +-0.1% or better.