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Online detection of harmful exhaust gases is necessary for optimal engine control to reduce the polluting emissions of diesel cars. Optical detection methods in the UV-VIS range enable the simultaneous characterisation of various gases such as NO, NO2 and SO2. Additionally this technique is fast and has a low cross-sensitivity to other exhaust components. First results show the advantages for the optical approach compared with standard electrochemical gas sensors.
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Martin Degner, Hartmut Ewald, "Low-cost sensor for online detection of harmful diesel combustion gases in UV-VIS region," Proc. SPIE 6198, Photonics in the Automobile II, 619806 (21 April 2006); https://doi.org/10.1117/12.662789