Global Combustion

Other Information

NOx Measurement
To Calculate the NOx levels in mg/m3 at Standard Excess Air.
NO (ppm)
NO2 (ppm)
1. Calculate NOx value in ppm (parts per million)

2. Convert ppm to mg/m3
For NO:

For NO2:

For NOx:

3. Calculate Correction Factor (Cf) to Standard Excess Air
O2% Standard (O2%s)
O2% Measured (O2%m)

4. Calculate NOx at Standard Excess Air