Flexzion Refrigerant Leak Detector Halogen Gas R134a R410a R22 HVAC CFC HFC Detection Portable Tools 0.1oz/yr With Carrying Case High Sensitivity Health and Safety Assistant Excellent sensor with high sensitivity, 0.1oz/yr (3g/yr) Flexible stainless steel probe reach to almost any tight space. Single color LED display with 7-level leak alarm Reset time sensitivity adjustment; Tactile keypads make the operation more convenient 12 inches (30cm) flexible probe. Detect leaks in air-conditionings, freezing systems and so on The unit responds to ALL haloge-nated (including Chlorine and Fluorine) refrigerants. This includes, but is not limited to: CFCs: R12, R11, R500, R503 etc. HCFCs: R22, R123, R124, R502etc. HFCs: R410a, R134a, R404a, R125 etc.