Constant temperature hygrometer

Details Constant temperature hygrometer Constant temperature hygrometer

G - Physics

01

N

73/71

G01N 19/10 (2006.01) G01N 27/00 (2006.01)

Patent

CA 1322468

CONSTANT TEMPERATURE HYGROMETER Abstract of the Disclosure A constant temperature hygrometer comprising a piezoelectric substrate supporting a temperature coefficient resistor on one face and a conducting electrode on the opposite face, one or both conductor faces partially or completely covered by a hygroscopic layer of aluminum oxide anodized from aluminum metal deposited on one or both conductor faces, operated by a feedback controlled constant temperature bridge circuit, excited and read out by radio frequency oscillator circuitry; together with alternate forms of hygrometer transducer structures and water vapor sorptive materials.

568304

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