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Electrodeless conductivity sensor with inflatable surface

  • US 5,077,525 A
  • Filed: 01/24/1990
  • Issued: 12/31/1991
  • Est. Priority Date: 01/24/1990
  • Status: Expired due to Term
First Claim
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1. An inductive conductivity sensor for communicating with a liquid to measure its conductivity, the sensor comprising:

  • a transducer for generating a changing magnetic field and for inductively measuring an electric current induced in the liquid by the changing magnetic field, the transducer having an external surface facing the liquid;

    an elastic membrane separating the external surface from the liquid; and

    means for inflating and deflating the elastic membrane such that the membrane is changed in shape to remove deposits formed on the membrane.

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