Patent ID: 7408158

Claim:
A gas sensor apparatus for sensing the presence of selected or target gasses in combination with multi-spectral sources of infrared radiation which comprises, a cylindrical housing or can open at both ends, an infrared filter closing off one end facing said radiation sources, a can base closing off the other end of said can, sensor element means in said housing adjacent said filter, including, a first brass washer at the top of said assembly means, a first layer of electrically conductive adhesive in contact with and under said washer, a first layer of Quantum Ferroelectric Copolymer under said adhesive responsive to infrared radiation from said infrared radiation source, a first layer of vacuum deposited Au coating on said Quantum Ferroelectric Copolymer in contact with and under said adhesive, a first layer of aluminum in contact with and under said first layer of copolymer, a first lead connected to said aluminum layer, and to amplifier circuit means connected to said first lead, whereby, upon bombardment of said first copolymer layer with infrared radiation from said source, said copolymer provides a measurable charge of photovoltaic and current output which signals the presence of a target or selected gas by its characteristic infrared radiation absorption band.