Apparatus for measuring pressure in a fluid using a seal diaphra

Details Apparatus for measuring pressure in a fluid using a seal diaphra Apparatus for measuring pressure in a fluid using a seal diaphra

1994-08-25

1996-09-03

Chilcot, Richard

Measuring and testing

Fluid pressure gauge

With protective separator

73716, G01L 700, G01L 1302

Patent

active

055512992

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: 4109535 (1978-10-01), Reed et al.
patent: 4498070 (1985-02-01), Lirman
patent: 4798089 (1989-01-01), Frick et al.
patent: 4837068 (1989-06-01), Martin et al.
patent: 4920972 (1990-05-01), Frank et al.
patent: 4970487 (1990-11-01), Tsukahara et al.

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