Multicomponent photometer
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United States of America Patent
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Jul 30, 1991
Grant Date -
N/A
app pub date -
Jun 30, 1989
filing date -
Jun 30, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A multicomponent photometer comprises a light source (10) emitting a continuum and from which a measuring light beam (12) originates. The measuring light beam (12) passes through a sample vessel (14) in which a sample gas can be introduced. A plurality of first gas vessels (26), which are filled with different gases looked for in the sample gas, and one or several second gas vessels (28), each of which is associated with at least one of the first gas vessels (26) and contains a reference gas, are located in a first filter wheel (22) and are optionally movable into the path of rays of the measuring light beam (12). One or several filters (32), each of which transmits only a limited spectral region about an absorption band of a gas contained in a first gas vessel (26) (blocking filter), are located in a second filter wheel (24) through which one of the filters (32) is optionally movable into the path of rays of the measuring light beam. The measuring light beam (12 ) is applied to a detector (36). The filter wheels (22,24) are controlled such that one and the same blocking filter (32) is arranged in the path of rays of the measuring light beam (12) in connection with the associated first gas filter (26) and in connection with the second gas filter (28) which is associated with this first gas filter (26).
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