Coverting ppm to mg/Nm3 for NOX Emissions

The following conversion factors are the basis for the conversion of ppm to mg/Nm3 refered @ 0ºC / 32ºF

CO 1ppm=1.25 mg/Nm3
NO2 1ppm= 2.05 mg/Nm3
SO2 1ppm= 2.86 mg/Nm3
NO 1ppm= 1.34 mg/Nm3