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Low Concentration Monitoring of Exhaust Gases Using a UV-Based Optical Sensor

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4 Author(s)
Gerard Dooly ; Electron. & Comput. Eng. Dept., Univ. of Limerick, Castletroy ; Elfed Lewis ; Colin Fitzpatrick ; Paul Chambers

The development of an ultra-violet (UV) differential optical absorption spectroscopy (DOAS) fibre-optic sensor for the monitoring of vehicle exhaust gases is described in this paper. Experimental results describing the operation of this sensor with NO2, SO2 , and NO are shown. These experimental results are compared with existing published spectroscopic absorption measurements. It is shown that the minimum detectable concentration of NO2 is 1 ppm, SO 2 is 1 ppm, and NO is 26 ppm. The sensor was found to have a low susceptibility to interference between the detection of these gases

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IEEE Sensors Journal  (Volume:7 ,  Issue: 5 )