Combustion Analyzer Kit InTech Residential Fuel Type 5 Pre-Programmed Fuels Options Natural Gas Oil #2 Oil #6 Kerosene B5 And Propane/LPG Combustion Efficiency 0.1 to 100 Percent Oxygen Concentration 0.0 Percent to 20.9 Percent Carbon Dioxide Concentration 0.1 To A Fuel Dependent Maximum (in Percent) Carbon Monoxide Measurement Range 0 to 2000 ppm Primary/Ambient Air Temp -4 Degrees to 212 Degrees F Stack Temp -4 Degrees to 1202 Degrees F Excess Air 0 to 250 Percent