Humidity indicator

A humidity indicator with a housing having mounted therein a sensing element that changes dimensionally in response to humidity variations. A flexible diaphragm is captively held within the housing and is moved by dimensional changes of the sensing element. An intermediate plate with a cavity forms...

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Bibliographic Details
Main Author CAPTAIN; KHUSHROO M
Format Patent
LanguageEnglish
Published 04.07.1978
Subjects
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
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Summary:A humidity indicator with a housing having mounted therein a sensing element that changes dimensionally in response to humidity variations. A flexible diaphragm is captively held within the housing and is moved by dimensional changes of the sensing element. An intermediate plate with a cavity forms a reservoir on the flexible diaphragm for a transduction fluid. An adjustable member received within the sensing element contacts a portion of the flexible diaphragm bounding the reservoir for initial calibration of the humidity indicator. A dial and cover assemblage having an internal capillary groove is mounted on the intermediate plate, a port interconnecting the reservoir and capillary groove. The transduction fluid within the reservoir flows into the capillary groove and provides an indication of the percent of relative humidity.
Bibliography:Application Number: US19770786006