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RELATIVE HUMIDITY SENSOR

  • US 3,715,702 A
  • Filed: 06/23/1971
  • Issued: 02/06/1973
  • Est. Priority Date: 06/23/1971
  • Status: Expired due to Term
First Claim
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1. A moisture sensitive element comprising spaced metal electrodes, an elecTrically insulating metal oxide coating overlapping said electrodes, said oxide having an electrical resistance which is humidity-dependent, said coating having a porous structure, the pores thereof being impregnated with a reversibly hygroscopic humectant material, and electrical leads attached to said electrodes.

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