Measuring and testing – Gas analysis – Moisture content or vapor pressure
Patent
1997-02-14
1998-09-08
Williams, Hezron E.
Measuring and testing
Gas analysis
Moisture content or vapor pressure
G01N 3700
Patent
active
058047212
ABSTRACT:
A pair of metal plates having a space therebetween are surrounded by a flexible enclosure which is waterproof and which is filled with a dry gas. A pair of electrical conductors connected to the plates extend through and are water-tight sealed to the enclosure. A water-deformable element which expands in the presence of moisture is disposed around the enclosure, and a rigid housing having holes therethrough is disposed around the water-deformable element so that moisture passing through the holes into the water-deformable element causes it to expand to move the enclosure and at least one plate so as to reduce the space between the plates to change the capacitance of the capacitor.
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Flanders Stephen N.
Yankielun Norbert E.
Larkin Daniel S.
Marsh Luther A.
Williams Hezron E.
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