For the measurement of NO and NO2 the CLD-analyzer (chemiluminescense detector) has been used for more than twenty-five years. The disadvantage of the CLD is that NO can be measured only. To obtain total NOX (NO+NO2) the exhaust gas sample has to flow through a catalytic converter, which reduces NO2 to NO. The converter has a efficiency between 90 and 100%. For precise NO and NO2 values it is an advantage to analyze NO and NO2 directly. This paper describes a new UV NOX-analyzer for the simultaneous measurement of NO and NO2. Two different configurations, for high and low concentrations, eg. CVS-bag analysis are presented. The performance of the analyzers is documented in comparison to the UV-RAS analyzer with converter for NOX [1] and the conventional CLD-analyzer. The benefits of the new analyzer compared to analyzers equipped with a converter are given in detailed test results.
Evaluation of an UV-Analyzer for the Simultaneous NO and NO2 Vehicle Emission Measurement
Sae Technical Papers
2004 SAE Fuels & Lubricants Meeting & Exhibition ; 2004
2004-06-08
Aufsatz (Konferenz)
Englisch
Evaluation of an UV-analyzer for the simultaneous NO and NO2 vehicle emission measurement
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British Library Conference Proceedings | 2001
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