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Ionic component sensor and method for making and using same

  • US 5,081,041 A
  • Filed: 04/03/1990
  • Issued: 01/14/1992
  • Est. Priority Date: 04/03/1990
  • Status: Expired due to Term
First Claim
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1. A composite sensing element useful in sensing the concentration of an ionic component in a medium comprising:

  • a first layer which includes a first matrix material which is permeable to the ionic component, and a sensing component in an amount effective to provide a signal which varies as the concentration of the ionic component in the medium varies; and

    a second layer which includes a second matrix material which is permeable to the ionic component, and an opaque agent in an amount sufficient to render said second layer effectively opaque, said first layer and said second layer being covalently bonded together, said composite sensing element being formed from a composite sheet comprising said first and second covalently bonded layers, from which composite sheet a plurality of said composite sensing elements may be formed.

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