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Ion sensor

  • US 4,871,442 A
  • Filed: 04/29/1987
  • Issued: 10/03/1989
  • Est. Priority Date: 05/01/1986
  • Status: Expired due to Term
First Claim
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1. An ion sensor comprising:

  • an electrically conductive substrate;

    a redox layer coating a surface of said electrically conductive substrate;

    a barrier layer coating a surface of said redox layer; and

    an ion-selective layer coating a surface of said barrier layer;

    said barrier layer made from a material which functions to prevent mutual contamination between said ion-selective layer and said redox layer with substances constituting these layers, and to transmit a potential produced in said ion-selective layer by contact with an ion from said ion-selective layer to said redox layer.

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