Compact, portable analyzer allows a complete analysis to be done in about 30 seconds. Volumetric method of gas analysis is used, involving selective absorption of CO2 in a chemical solution. Accuracy within 0.5% in 0-20 and 0-60% models. Will not be affected by the presence of any other gas in the sample. Fluid can be easily replaced. Comes complete with an aspirator bulb which pumps gas sample into the analyzer and purges the measuring chamber of the previously analyzed sample, a saturator filter, 3 feet of rubber tubing and a metal case for carrying.