| 摘要 |
The invention relates to a non-dispersive infrared gas analyzer ( 1 ) for identifying a test gas containing a number of gas constituents, comprising a radiation source ( 2 ), a modulating device ( 3 ), a measuring cell ( 4 ), which has a measuring chamber ( 4 a) and a comparing chamber ( 4 b), and comprising an optopneumatic detector unit ( 5 ) that has a first detector ( 5 a), which, for measuring gas constituent A, is filled with gas constituent A, and has a second detector ( 5 b), which is situated behind the first detector ( 5 a) and which, for measuring gas constituent B, is filled with the isotope B* thereof.
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