Patent ID: 7151260

Claim:
Stand-alone multiple gas analysis apparatus comprising: an FT-IR gas analyzer, including a product case, an infrared radiation source, an interferometer, a gas sample cell, an infrared detector having an associated preamplifier, and optics operatively disposed for transmitting radiation between said radiation source, said interferometer, said gas sample cell and said detector, said radiation source, said interferometer, said gas sample cell, said detector and preamplifier, and said optics all being enclosed within said FT-IR gas analyzer product case, said FT-IR gas analyzer additionally including a single gas inlet conduit connected to said gas sample cell for conducting gas to said gas cell from a location external to said product case and having at least a portion of its length enclosed within said product case, and a single gas outlet conduit connected to said gas sample cell for conducting gas from said gas sample cell to a location external to said product case and having at least a portion of its length enclosed within said product case, said single gas inlet conduit, said single gas outlet conduit, and said gas sample cell cooperatively defining a gas flow path for gas to be analyzed; and at least one sensor, enclosed within said FT-IR product case and integrated into structure defining said gas flow path for contact by the gas to be analyzed, said at least one sensor being constructed for the analysis of molecular oxygen and for generating an electrical signal representative of the concentration of molecular oxygen; said analysis apparatus being devoid of gas analysis means disposed external to said FT-IR gas analyzer product case and operatively connected to said gas flow path for contact by the gas to be analyzed.