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Proceedings Paper

Self-calibrated fiber optic transflection probe for NO2 detection
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Paper Abstract

The paper describes an optical fiber based sensor (FOS) for the detection of the pollutant gas, NO2, in a mixture of gases. The design comprises of a fiber optic transflection probe with a sensor element placed at one end. In the present FOS, the transducing component is prepared by sol-gel process. An equal quantity of a diazotizing reagent together with a coupling reagent is immobilized in the sol-gel matrix, which forms an azo dye in the presence of NO2. The sensor relies on the coloration reaction occurring at the micropores of this sol-gel film in the NO2 environment and offers a consequent variation in the optical absorption at a specific wavelength. The current sensor design gives more than 85% of variation in the output intensity at a NO2 concentration of few parts per million in air sample.

Paper Details

Date Published: 8 March 2004
PDF: 6 pages
Proc. SPIE 5272, Industrial and Highway Sensors Technology, (8 March 2004); doi: 10.1117/12.516204
Show Author Affiliations
Shelly John Mechery, Mississippi State Univ. (United States)
Jagdish P. Singh, Mississippi State Univ. (United States)

Published in SPIE Proceedings Vol. 5272:
Industrial and Highway Sensors Technology
Brian Culshaw; Michael A. Marcus; John P. Dakin; Samuel David Crossley; Helmut E. Knee, Editor(s)

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