The operation method of the nitrogen oxide analyzer is the knowledge brought to everyone today. The nitrogen oxide analyzer uses the principle of chemiluminescence to analyze the concentration of NO or NOx in a gaseous sample. In NO mode, the method is based on ozone and nitric oxide (NO) A chemiluminescent reaction between nitrogen dioxide (NO 2) and oxygen is produced.

About 10% of the NO 2 produced by this reaction is in the electronically excited state. The transition from this state to the normal state produces an intensity that is similar to the NO entering the reaction chamber. 2 mass flow proportional to the light. The light is measured by a photodiode tube and associated amplifying electronics. In NOX mode, NO plus NO 2 is determined as above, however, the sample is first passed through internal NO 2 to NO converter, which converts NO 2 in the sample to NO. The resulting reaction is then proportional to the total concentration of NOx. The entire sample, prior to the reaction chamber, was maintained at a temperature of 65°C.

The nitrogen oxide analyzer is designed to continuously measure the total concentration of nitrogen oxides in gaseous samples. The gaseous sample may be ambient air, an exhaust gas from an internal combustion engine, or an exhaust gas from a combustion process. For direct calculation of mass emissions, a wet measurement method may be required.

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