Pressure responsive apparatus

Details Pressure responsive apparatus Pressure responsive apparatus

G - Physics

01

L

73/10, 73/3

G01L 13/02 (2006.01) G01L 9/00 (2006.01)

Patent

CA 1107982

Abstract of the Disclosure A liquid filled differential pressure transmitter includes a metallic measurement diaphragm within a pressure chamber and a pair of iso- lation diaphragms sealing the chamber from the process fluid which serve to transmit the applied pressure signals to the measurement diaphragm. The isolation diaphragms bottom against mating back-up surfaces to limit deflec- tion of the diaphragm during overrange pressure conditions. An electrically conductive liquid fills the chamber so that measureable electrical resistances are established through the liquid between the measurement diaphragm and a pair of electrodes adjacent thereto formed on opposite walls of the chamber. As the measurement diaphragm deflects in response to applied pressure signals, the electrical resistance between the diaphragm and each of the electrodes changes providing an output signal which is a function of the applied differ- ential pressure.

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