Gas analysis instrument

摘要

The gas analysis instrument has a radiation source (2), a spherical mirror (3), a modulator (4), a working cell (5) and comparison cell (6) arranged in parallel, an infrared filter (7), a lens (8) and a radiation receiver (9), which are arranged in the order given in the direction of the radiation flow passing through. The diameter of the working cell (5) is made greater than the diameter of the comparison cell (6), in order to increase the signal-to-noise ratio. <IMAGE>