Combustion Analyzer Kit, Digital Display Screen Type LCD, Maximum Carbon Monoxide Measured 2,000 ppm, Maximum Oxygen Measured 20.9 Percent v/v, Minimum Oxygen Measured 0 Percent v/v, Selectable Fuel Options B5, Bio Fuel, Butane, Kerosene, KOKS, LEG, LPG, Natural Gas, Oil 2/6, Propane, Minimum Carbon Monoxide Measured 0 ppm, Maximum Combustion Efficiency 100 Percent, Minimum Combustion Efficiency 0.1 Percent, Maximum Excess Air Measured 250 Percent, Minimum Excess Air Measured 0 Percent