The progress in the miniature drive technology and high-precision mechanics makes it possible to use the classic filter wheel spectrometer in a much more competitive and compact form for multi component gas analysis. In contrast to the multi-color detectors, the measuring signal is available in a series through the very same optical and electrical channel. However, for a constant metering time period the modulation frequency of the IR detector rises with a higher channel number. InfraTec GmbH (
