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Sensor for monitoring the deposition of frozen fog and/or ice on surfaces

  • US 4,532,806 A
  • Filed: 02/15/1983
  • Issued: 08/06/1985
  • Est. Priority Date: 02/16/1982
  • Status: Expired due to Fees
First Claim
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1. Sensor for monitoring the deposition of frozen fog and/or ice on evaporator surfaces, comprising a can-shaped housing having opposite sides, means for heat conductingly connecting said housing to the evaporator, first and second membranes respectively disposed at said opposite sides of said housing, first and second electroacustic transducers each being attached to a respective one of said membranes, and means for applying alternating voltage to said first transducer causing said first transducer to oscillate said first membrane, said second membrane being spaced from said first membrane by a distance permitting oscillation of said first membrane to oscillate said second membrane.

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