Pressure sensor for high-temperature liquids

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

1977-06-06

1978-08-01

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

With protective separator

73718, G01L 708, G01L 912

Patent

active

041035550

ABSTRACT:
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 displacment 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 mechanical 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 calibrated rapidly and absolutely.

REFERENCES:
patent: 2883995 (1959-04-01), Bialous et al.
patent: 3067614 (1962-12-01), Rich

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