Electrode system for an electro-chemical sensor for measuring vapor concentrations

DETAILED DESCRIPTION The object of the present invention is to provide an improved electrode for as electrochemical sensor.
In accomplishing this and other objects, there has been provided, in accordance with the present invention, an electrode for an electrochemical sensor system comprising a chemically inert non-conductive substrate, a plurality of electrically conductive segments isolated from each other mounted on the substrate, a plurality of differing ion conductive sensing materials covering respective ones of the segments, at least one electrically conductive uncoated segment mounted on the substrate and isolated from the plurality of segments, a non-aqueous electrolyte covering all of said segments on an outside surface of the sensing materials and on the uncoated segment to form a sorption/desorption medium, a semi-permeable membrane means covering the electrolyte and a plurality of electrical conductors attached to respective ones of the segments.