Detailed Product Description Detect leaks in:Refrigerating systems Air conditioning units It responds to ALL halogenated (containing chlorine or fluorine) refrigerants, including:CFCs e.g. R11, R12, R500, R503 etc HCFCs e.g. R22, R123, R124, R502 HFCs e.g. R125, R134a, R404a Blends including AZ-50, HP62, MP39 etc Detect ethylene oxide gas leaks in hospital sterilizing equipment Detect SF-6 in ...