8.5.3 Colorimetric CO and NO2 Gas Sensors for Fire Detection
- 14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
- 8.5 Optical absorbance-based Sensors
- C. Peter, I. Schumacher, K. Schmitt, J. Wöllenstein - Fraunhofer Institute for Physical Measurement Techniques (Germany), D. Gutmacher - Siemens Schweiz AG (Switzerland)
- 732 - 735
We present the development of a novel CO and NO2 sensing principle using gasochromic materials. The sensor set-up works with a very low power consumption to enable their usage in commercial fire detection systems. CO and NO2 are both typical fire indicating gases. For the detection of CO we used a binuclear rhodium complex. NO2 can be detected using the chinonime dye N,N,N’,N’-tetramethyl-phenylene-diamine. Both dyes were embedded into a highly porous polymer and deposited on planar optical waveguides by spin coating. The capability of the developed sensors was shown in a real fire lab, regarding different standardized test fires.