The Robinair DiscovR Refrigerant Identifier is engineered to determine if the R134a refrigerant you're working with is acceptable prior to servicing A/C systems. The identifier can also help pinpoint refrigerant identification problems and can assist techs in determining how to identify, recover, and dispose of any contaminated refrigerants they may encounter. Professional techs can use the identifier to uncover hard to find air contamination and confirm that the refrigerant the supplier is sending the shop is pure and uncontaminated.