Pressure measuring apparatus

Details Pressure measuring apparatus Pressure measuring apparatus

1992-04-03

1995-03-28

Woodiel, Donald

Measuring and testing

Fluid pressure gauge

With protective separator

73715, 92103M, G01L 708

Patent

active

054006554

ABSTRACT:
A pressure measuring apparatus comprising a seal diaphragm that separates a fluid to be measured from a pressure transmitting medium that transmits a pressure variation of the fluid to be measured to a pressure detecting section. In such an apparatus, a non-electrically conductive film is coated on a surface of the seal diaphragm which is on the side of the fluid to be measured. As a result of the above construction, the pressure can be measured accurately over a long period of time while preventing hydrogen from passing through the seal diaphragm surely and protecting the seal diaphragm.

REFERENCES:
patent: 4498070 (1985-02-01), Lirman
patent: 4837068 (1989-06-01), Martin et al.
patent: 4920972 (1990-05-01), Frank et al.
patent: 4970487 (1990-11-01), Tsukahara et al.
Communication from European Patent Office dated Oct. 12, 1993 with attached European Search Report.

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