Pressure sensor for high-temperature liquids

Details Pressure sensor for high-temperature liquids Pressure sensor for high-temperature liquids

G - Physics

01

L

359/19, 73/3, 73

G01L 7/08 (2006.01) G01L 9/00 (2006.01) G01L 19/06 (2006.01)

Patent

CA 1071426

ABSTRACT OF THE DISCLOSURE A pressure sensor for use in measuring pressures in liquid at high temperatures, especially such as liquid sodium or liquid potassium, comprises a soft diaphragm in contact with the liquid. The soft diaphragm is coupled mechanically to a stiff diaphragm. Pressure is measured by measuring the displacement of both diaphragms, typically by measuring the capacitance between the stiff diaphragm and a fixed plate when the stiff diaphragm is deflected in response to the measured pressure through mecnanical coupling from the soft diaphragm. Absolute calibration is achieved by admitting gas under pressure to the region between diaphragms and to the region between the stiff diaphragm and the fixed plate, breaking the coupling between the soft and stiff diaphragms. The apparatus can be cali- brated rapidly and absolutely.

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