Measuring and testing – Gas analysis – Moisture content or vapor pressure
Patent
1987-06-02
1988-12-27
Levy, Stewart J.
Measuring and testing
Gas analysis
Moisture content or vapor pressure
73 29, G01W 100
Patent
active
047931817
ABSTRACT:
A constant temperature sorption hygrometer comprising a differential pair of substrate-supported heated metal film sensing elements, one coated with a hygroscopic layer of microporous aluminum oxide and the other coated with a non-hygroscopic protective coating or uncoated, both operated by feedback controlled constant temperature bridge circuits; together with alternate forms of hygrometer transducer apparatus employing differential sorption detection of water vapor.
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Levy Stewart J.
Roskos Joseph W.
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