DUAL-BEAM MULTIPLE UNIT GAS ANALYZER STRUCTURE

摘要

Apparatus for performing multiple gas analyses simultaneously in which a plurality of optical gas analysis assemblies are mounted in a frame housing in a manner to be operative with a single chopper disc. Each optical gas analysis assembly includes a support plate means supporting a single source of radiant energy and a single detector of such radiant energy, structure defining a sample gas chamber and a reference gas chamber between the source and detector, optical means for directing radiant energy from the source through the gas chambers to the detector, and ports for entry and exit of test gas. Calibration means and circuit housing means can be mounted on each optical assembly. Phase reference generating means mounted within the frame housing coact with the single chopper disc and provide for selecting the synchronous relationship between the phase reference generating means and passage of radiant energy through the gas chambers of each optical assembly. Circuit connector means connect the output of each radiant energy detector to its respective signal separation circuitry.