High-Temperature Pressure Transducers

Pressure sensing systems operating at temperatures >200 °C are required for a variety of presentand next-generation applications ranging from oil field instrumentation to turbine engine control. Quite often, part or all of the sensing system must be physically removed from the hightemperature environment. In some cases, pressure translating devices and capillary tubes are used to isolate the sensing mechanism. Alternatively, the pressure sensor can sometimes be placed in the high temperature environment and its supporting electronics in an adjacent, low temperature location. Unfortunately, these techniques can contribute significant noncompensable errors, e.g., pressure and thermal hysteresis and instability, to the sensing