Abstract:The conversion rate of NO2-NO is an important indicator of the conversion efficiency of nitrogen oxides. The conversion rate of the NO2-NO directly determines the accuracy of the total measurement of nitrogen oxide emissions. The evaluation method of the difference between NO and NO2 is used. The equipment was analyzed by example and compared with the results of the conversion rate calculation module provided by the nitrogen oxide detector. The method was proved to be reliable and effective, and the NO2-NO conversion rate of the nitrogen oxide detector can be analyzed quickly and easily.