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Method and apparatus for controlling the feed of water treatment chemicals using a voltammetric sensor

  • US 5,470,484 A
  • Filed: 01/13/1994
  • Issued: 11/28/1995
  • Est. Priority Date: 01/13/1994
  • Status: Expired due to Term
First Claim
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1. A method for controlling the chemical treatment of a solution comprising the steps of:

  • (a) feeding a treatment chemical into the solution to obtain a mixture of the treatment chemical and the solution;

    (b) applying an external voltage across a reference electrode and a working electrode of a voltammetric sensor while the electrodes are immersed in and contact the mixture;

    (c) measuring a current that flows through the working electrode;

    (d) converting the measured current into a feedback signal which is indicative of a concentration of a substance in the mixture; and

    (e) using the feedback signal to control a rate of feeding the treatment chemical in step (a).

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