Vehicle passenger compartment gas mixture constituent measurement procedure uses electrically filtered infrared radiation passed twice through sample holder using mirror on window heat sink

摘要

A vehicle passenger compartment gas mixture constituent measurement procedure uses electrically filtered infrared radiation passed twice through the sample holder (4) from transmitter (10) to a receiver (11) via a reflector (8) thermally coupled to a window or windscreen as heat sink : Independent claims are included equipment using the procedure.