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Fluoropolymer humidity sensors

  • US 5,045,828 A
  • Filed: 07/27/1989
  • Issued: 09/03/1991
  • Est. Priority Date: 07/27/1989
  • Status: Expired due to Fees
First Claim
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1. A humidity sensor comprising:

  • (a) a substrate having an electrically insulative surface,(b) a pair of spaced electrodes on said surface; and

    (c) a film having a thickness of approximately 5 microns or less on said surface interconnecting said electrodes, said film comprising;

    the reaction product of polytetrafluorethylene with ionogenic grouping appended thereto and an aqueous solution of a compound taken from the class consisting of lithium compounds, ammonium compounds, sodium compounds, silver compounds, magnesium compounds and combinations thereof.

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