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 high voltage circuit breakers Detect most gasses that contain chlorine, fluorine and bromine (halogen gasses) Detects cleaning agents used when dry cleaning such as perchloroethy Detects halogen gasses in fire extinguishing systems Specification: Operating temperature:0°C to 52°C (30°F t 125°F) Maximum sensitivity: 6gr/yr for all halogenated refrigerants Battery life: approximately 50 hours normal use Response time: immediate Work mode: continuous – no limitations Fixed probe length: 20cm Unit dimensions: 15 x3 x 3 cm Warm-up time: approximately 6 seconds Reset time: 2 to 10 seconds Powered by: 2 x AAA 1.5V batteries (not included) Package Contents: 1 x Halogen Leak Detector with probe 1 x Instruction Sheet 1 x Black carrying pouch