Patent ID: 8158945
Filing Date: 2012-04-17
Classification: G01N

Abstract:
1. A detector arrangement for a non-dispersive infrared gas analyzer for detecting a measuring gas component in a gas mixture, comprising: a first single-layer receiver containing a measuring gas component or a gas spectrally overlaying the measuring gas component; a second single-layer receiver containing a transverse gas, a measuring gas component or a gas spectrally overlaying the measuring gas component; and an evaluating device for determining a concentration of the measuring gas component in the gas mixture from signals supplied from sensors of the first and second single-layer receivers, wherein the first and second single-layer receivers are located one behind the other in a beam path of the infrared gas analyzer, wherein the evaluating device includes a two-dimensional calibration matrix corresponding to a number of single-layer receivers, wherein signal values from the sensors obtained in the case of different known concentrations of the measuring gas component in the presence of different known transverse gas concentrations are stored in the evaluating device as two-tuples, and wherein the evaluating device is configured to determine the concentration of the measuring gas component when measuring unknown concentrations of the measuring gas component in the presence of unknown transverse gas concentrations by comparing the two-tuples of signal values obtained thereby with the two-tuples of signal values stored in the calibration matrix.