Patent ID: 7913542

Claim:
A gas sensor assembly for detecting a constituent in a gaseous stream, the assembly comprising: (a) a mounting surface having a central portion formed on a flexible circuit such that said central portion of said mounting surface does not contact underlying components of said sensor assembly; (b) a sensor mounted on the mounting surface, said sensor capable of generating a detectable signal in the presence of said constituent; and (c) an enclosing structure comprising: (i) a walled component having a pair of vertically spaced ends, the walled component mounted at one end on said mounting surface and circumscribing said sensor; and (ii) a gas-permeable membrane attached at the other end of said walled component, thereby defining an interior volume within said enclosing structure, said gas-permeable membrane having optical properties that inhibit passage of light into said interior volume; whereby flowing the gaseous stream across said gas-permeable membrane infuses a portion of the gaseous stream into said interior volume containing said sensor.