A colorimetric CO sensor for fire detection

We report on a colorimetric carbon monoxide (CO) sensor based on a rhodium complex. The sensor relies on changes in the light absorption properties of the chemochromic reagent when exposed to the gas. Its optical properties in solution and in a polymeric matrix were investigated by spectrophotometry...

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Bibliographic Details
Main Authors: Courbat, J., Pascu, M., Gutmacher, D., Briand, D., Wöllenstein, J., Hoefer, U., Severin, K., de Rooij, N.F.
Format: Conference Proceeding
Language:English
Subjects:
Carbon monoxide
Color dye
Colorimetric
Fire detection
Optical waveguide
Rhodium
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Summary:We report on a colorimetric carbon monoxide (CO) sensor based on a rhodium complex. The sensor relies on changes in the light absorption properties of the chemochromic reagent when exposed to the gas. Its optical properties in solution and in a polymeric matrix were investigated by spectrophotometry. A strong color change from purple to yellow was obtained when exposed to CO. For its implementation in a sensor configuration, the complex embedded in a PVC-based matrix was spin-coated onto a glass waveguide. The sensor was tested in a gas cell and with standardized test fires. It showed a high sensitivity to low concentrations of CO, a fast reaction time and complete reversibility. The device may find applications in the field of fire detection and indoor air quality monitoring.
ISSN:1877-7058
1877-7058
DOI:10.1016/j.proeng.2011.12.328