In article ,
says...
I was wondering if anyone can answer a question for me.

I borrowed a flue gas analyser to check my oil boiler efficiency
recently. It seems to be working just fine according to the analyser
but there was one parameter 'smoke number' given on the boiler data
sheet as 0-1 which the analyser didn't test for. Is there a conversion
formula that you can use to get this figure. The analyser provided
figures for flue gas temp, oxygen, carbon dioxide, carbon monoxide and
boiler efficiency.

I think smoke is particulate matter, and not directly related to the gas
analysis.