Patent ID: 8303788

Claim:
An electrochemical gas sensor comprising: a working electrode comprising a gas porous membrane and a catalyst layer formed on one side of the membrane; a counter electrode that includes a catalyst; electrolyte in contact with the catalyst both of the working electrode and of the counter electrode; and a support which is one of rigid or semi-rigid, the support defines a plurality of open areas allowing gas to contact the membrane, the support is in contact with, and presses against a side of the working electrode remote from the electrolyte to compress the electrodes and the electrolyte together, the support including solid regions that extend between the open areas for contacting and supporting the membrane, the support having a thickness of only approximately 0.1 mm thick and wherein the support defines a plurality of open areas allowing gas to contact the membrane, the surface area of the solid regions of the support between the open areas being less than 40% of the combined surface area of the open areas and the solid regions of the support between them.