Dew-sensing hygroscopic element

G - Physics – 08 – B

Patent

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340/139, 73/71,

G08B 19/02 (2006.01) C08L 29/04 (2006.01) G01N 27/12 (2006.01)

Patent

CA 1111928

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

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