Patent ID: 7316768

Claim:
A gas sensor comprising a housing including a shelf member and a chamber containing an electrolyte, said housing and shelf member being made of a metallic material, a cathode mounted on the shelf member, said cathode having a plurality of holes therein and including a conductive tail element, a gas permeable membrane overlying the cathode that prevents electrolyte escaping the chamber but allows gas to permeate the membrane, and an anode within the chamber that is spaced from the cathode and is in electrical contact with the electrolyte and the conductive housing, said tail element of the cathode being adapted to be connected to the anode through an electrical circuit including the metallic housing upon use of the sensor with a gas-analyzing instrument, the shelf member has a topside, an underside, and a central opening, and the anode is in electrical contact with the underside and has a central aperture in communication with the central opening in the shelf member.