Dew-sensing hygroscopic element

Details Dew-sensing hygroscopic element Dew-sensing hygroscopic element

1977-08-04

1979-09-11

Albritton, C. L.

Electrical resistors

Resistance value responsive to a condition

Gas, vapor, or moisture absorbing or collecting

422 98, H01L 700

Patent

active

041677250

ABSTRACT:
A dew-sensing hygroscopic element includes a pair of electrodes and a dew-sensing hygroscopic material arranged between the electrodes which detects dew by the change of impedance between the electrodes. The dew-sensing hygroscopic material comprises polyvinyl alcohol having a saponification equivalent of 20 to 65 as a base material and contains an organic electrolyte.

REFERENCES:
patent: 2937524 (1960-05-01), Gregor
patent: 3295088 (1966-12-01), Smith
F. W. Dunmore, Journal of Research of the National Bureau of Standards, "An Improved Hygrometer," vol. 23, pp. 701-714, Dec. 1939.
Koso Kisho, No. 3, May. 1954, pp. 1-12.
Keiso, Sep. 1960, pp. 21-26.

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