Patent ID: 8083914

Claim:
An electrochemical gas sensor comprising: a housing, the housing defining a gas inlet therethrough and also an interior surface; and a stacked combination of an electrolyte absorbing material, adjacent to the surface and an overlying gas sensing electrode that detects oxygen with one entire side of the electrolyte absorbing element directly facing the overlying gas sensing electrode, a peripheral region of the gas sensing electrode positioned adjacent to and in contact with a portion of the surface, the gas sensing electrode covering an end of the gas inlet, with the electrode being bonded to an annular region of the surface, around the inlet, the absorbing material is retained between the surface and a portion of the electrode, by an annular bond, forming a unitary multi-layered subassembly wherein the electrolyte absorbing material absorbs on the facing side any liquid electrolyte passing through the gas sensing electrolyte to prevent any detrimental effects on cell performance caused by liquid electrolyte residing in the region of the gas inlet.