Does anyone have the forumula to convert raw nox to corrected nox?
thanks

Hope this answers your question.... you will need O2 readings to correct nox.


Correcting to a reference oxygen contentThe following equation can be used to correct a measured pollutant concentration in an emitted gas (containing a measured O2 content) to an equivalent pollutant concentration in an emitted gas containing a specified reference amount of O2:[4]


where:
Cr = corrected concentration in a dry gas having a specified reference volume % O2 = r
Cm = measured concentration in a dry gas having a measured volume % O2 = m

Thus, a measured NOx concentration of 45 ppmv (dry basis) in a gas having 5 volume % O2 is
45 × ( 20.9 - 3 ) ÷ ( 20.9 - 5 ) = 50.7 ppmv (dry basis) of NOx when corrected to a gas having a specified reference O2 content of 3 volume %