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Differential conductivity recirculation monitor

  • US 5,510,717 A
  • Filed: 05/31/1995
  • Issued: 04/23/1996
  • Est. Priority Date: 09/30/1992
  • Status: Expired due to Term
First Claim
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1. A method for determining a difference in electrical conductivity of at least two fluids comprising:

  • placing a first fluid into a first conductivity cell having a tubular ring configuration, said fluid forming a continuous electrical path;

    placing a second fluid into a second conductivity cell having a tubular ring configuration, said fluid forming a continuous electrical path;

    inducing a first electrical current in the first fluid in the first conductivity cell and a second electrical current in the second fluid in the second conductivity cell;

    sensing the first electrical current in the first fluid in the first conductivity cell and the second electrical current in the second fluid in the second conductivity cell; and

    subtracting the second electrical current from the first electrical current to produce a signal representative of the difference in the conductivity between the first and the second fluids.

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