Patent ID: 7727369

Claim:
A gas sensor comprising: a sensor housing comprising a first housing part and a second housing part together defining a gas entrance, a gas collection space and a gas distribution space, said first housing part having a first housing part interior surface extending between said gas collection space and said gas distribution space, said second housing part having a second housing part interior surface extending between said gas collection space and said gas distribution space, said first housing part interior surface being opposite said second housing part interior surface, one of said first housing part and said second housing part having a hole extending inwardly from an exterior of said housing and communicating with said first housing part interior surface and said second housing part interior surface; a diffusion-limiting barrier at said gas entrance whereby gas to be analyzed diffuses into said collection space through said diffusion-limiting barrier; a working electrode disposed in communication with said gas distribution space, said working electrode being supported by said sensor housing with a working electrode disposition providing a portion extending in a plane; a capillary tube arrangement between said first housing part interior surface and said second housing part interior surface with one end in said gas collection space and another end in said distribution space providing a gas diffusion path between said diffusion-limited gas entrance and said working electrode for diffusion of the measuring gas to be analyzed from said gas collection space to said working electrode through said capillary tube arrangement, said capillary tube arrangement having a portion extending in parallel to said plane or along said plane at least in some sections adjacent to said working electrode; and a sealing compound filling said hole for sealingly connecting said capillary tube arrangement with said first housing part and said second housing part.