Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1984-12-21
1986-02-04
Tung, T.
Chemistry: electrical and wave energy
Apparatus
Electrolytic
204416, 204418, 204419, 204435, G01N 2746
Patent
active
045684456
ABSTRACT:
An electrode system for an electrochemical sensor has a plurality of electrically conductive sensing segments isolated from each other and mounted on a support substrate formed from a chemically inert encapsulation material. The sensing segments are unencapsulated and are each coated with respective ones of ion conducting sensing materials to characterize each of the segments except for one of the segments which is uncoated and is arranged to be used as a reference electrode. The outer surface area of the sensing materials and the reference electrode is coated with a layer of a nonaqueous electrolyte which serves as a sorption/desorption medium. The electrolyte, in turn, is covered by a semipermeable thin film membrane secured at its peripheral edge by an O-ring to the support to form a fluid seal. Electrically conductive leads are connected to respective ones of the sensing surfaces, and a temperature measuring device is provided in the electrode structure for temperature compensation.
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Cates Marion H.
Szonntagh Eugene L.
Halista Mitchell J.
Honeywell Inc.
Joike Trevor B.
Tung T.
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