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Moisture sensing device for pipes and the like

  • US 4,374,379 A
  • Filed: 08/25/1980
  • Issued: 02/15/1983
  • Est. Priority Date: 08/25/1980
  • Status: Expired due to Term
First Claim
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1. A device capable of detecting an extremely small drop of liquid associated with a leak from a pipe or the like comprising an alarm means, an elongated strip of insulating material having inner and outer faces, spaced longitudinally extending electrical conductors partially embedded in said strip, continuous portions of each of said conductors exposed on said outer face of said strip, said conductors being closely spaced to one another with a maximum spacing of about 3/64th of an inch therebetween so that extremely small particles of liquid can be detected, means on the inner face of said strip for mounting said strip to said pipe or the like, said electrical conductors connected with said alarm means, said alarm means arranged to initiate an alarm upon moisture bridging said electrical conductors.

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