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Water purity testing system having reversing polarity

  • US 5,581,189 A
  • Filed: 09/02/1994
  • Issued: 12/03/1996
  • Est. Priority Date: 03/17/1992
  • Status: Expired due to Fees
First Claim
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1. For use in testing water for dissolved solids, a water testing system comprising:

  • a pair of electrodes exposed to said water; and

    means for applying a voltage and current of predetermined magnitude, duration and first polarity to at least one of said electrodes and for measuring the current flow between said pair of electrodes during a first time period, and for grounding said first electrode to prevent the buildup of debris with respect to said electrodes, and for ungrounding said first electrode, and for applying a voltage and current of predetermined magnitude, duration and second polarity, opposite said first polarity, to said at least one electrode and for measuring the current flow between said pair of electrodes during a second time period period, and for grounding said first electrode to prevent the buildup of debris with respect to said electrodes, and for ungrounding said first electrode.

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