This test is not usually performed for maintenance of chillers, but is used for analyzing the purity of recycled refrigerants. The test measures the percentage of air in a sample of refrigerant vapor. A vapor-phase sample must be taken for this analysis. $37.00 Turn-Around Time: NormalRUSH (+37.00) Refrigerant Sample Kit: Not IncludedDOT Cylinder Kit (+75.00) View DOT Refrigerant Cylinder