Contamination of refrigerants either in storage cylinders or vehicle air conditioning systems can lead to component corrosion, elevated head pressures and system failures when used by unsuspecting technicians. The ability of the technician to determine refrigerant type and purity is severely hampered by the presence of air when attempting to use temperature-pressure relationships. Robinair’s Refrigerant Identifier Plus (16910) provides a fast, easy and accurate means to determine refrigerant purity in refrigerant storage cylinders or directly in vehicle air conditioning systems. It displays the actual percent of R-12, R-134a, R-22 and air in the system or tank. It features air purge, a visual and audible hydrocarbon alarm and an on-board printer port.