Suitable diluent air can be obtained from specialty gas suppliers, and in certain industrial settings, high-purity nitrogen is available as a plant-wide utility. Whatever the source, the diluent air must be free of detectable amounts of the target analyte, and—ideally—meet the following purified diluent air specifications:





Compound Max. Allowable 
CO < 0.5 ppm
Particulates  < 0.45 micrograms
N2 < 0.5 ppm
NOx < 0.5 ppm
SO2 < 0.5 ppm
 Total hydrocarbons < 0.5 ppm


 purified diluent air specifications

Please contact us for specific purified diluent air recommendations pertaining to your project.