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Proceedings Paper

Performance analysis of diode optopair gas sensors
Author(s): Galina Yu. Sotnikova; Sergey E. Aleksandrov; Gennadyi A. Gavrilov
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Paper Abstract

Analytical description of the transfer function of an optical gas sensor takes into account a fine structure of gas absorption spectra and spectral characteristics of optopair elements and their temperature drift. Such approach permits one to estimate as early as at the designing stage the expected accuracy of measurements that can be provided by non-dispersive infrared (NDIR) gas sensors of different configuration as the environment temperature changes and/or in the presence of interference from foreign gases. Moreover, analytical description of the transfer function allows increasing the accuracy of gas concentration measurements. Calculated and experimental results of the study of laboratory models of small-size NDIR sensors based on mid-infrared (3-5 μm) immersion diode optopairs are given. The presented results confirm the validity of the proposed approach for the NDIR gas sensor description and promising prospects for using the sensors based on immersion diode optopairs in portable gas analysers.

Paper Details

Date Published: 18 May 2009
PDF: 11 pages
Proc. SPIE 7356, Optical Sensors 2009, 73561T (18 May 2009); doi: 10.1117/12.820668
Show Author Affiliations
Galina Yu. Sotnikova, Ioffe Physical-Technical Institute (Russian Federation)
Sergey E. Aleksandrov, Ioffe Physical-Technical Institute (Russian Federation)
Gennadyi A. Gavrilov, Ioffe Physical-Technical Institute (Russian Federation)


Published in SPIE Proceedings Vol. 7356:
Optical Sensors 2009
Francesco Baldini; Jiri Homola; Robert A. Lieberman, Editor(s)

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