Apparatus for measuring pressure in a fluid using a seal diaphragm and pressure transmitting medium
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United States of America Patent
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Sep 3, 1996
Issued Date -
N/A
app pub date -
Aug 25, 1994
filing date -
Jul 4, 1991
priority date (Note) -
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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.
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