The Robinair R-ID and R-ID Plus Refrigerant Analyzers, Nos. 16990 and 16995, allow technicians to quickly and accurately determine the refrigerant purity of a vehicle’s A/C system. Both refrigerant analyzers are designed for use on vehicles with either R-134a or R-1234yf refrigerant. Powered by an internal lithium ion battery, the R-ID and R-ID Plus measures the percentage of R-134yf, R-134a, R-12 refrigerants, as well as R-22 and Hydrocarbon contaminants. Each device has a large, easy to read color display that shows analysis results and helps technicians to determine the next step of an A/C system service. The R-ID Plus adds an internal printer to print final test results.