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Moisture sensor

  • US 4,632,879 A
  • Filed: 04/27/1984
  • Issued: 12/30/1986
  • Est. Priority Date: 04/30/1983
  • Status: Expired due to Fees
First Claim
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1. A moisture sensor comprising a substrate, a bottom electrode formed on said substrate, a moisture sensitive film formed on said bottom electrode and a moisture permeable electrode formed on said moisture sensitive film, said moisture sensitive film being formed by high crystallizable polyvinyl alcohol which is heat treated thereby attaining a linear relationship between the impedance and the relative humidity ranging from 0% to 90% of the relative humidity.

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