The MT980 Refrigerant (Halogen) Leak Detector detects all CFC refrigerants such as R-22, R-124, R-11 and R-12. The ultra-sensitive long life sensor detects the more current and difficult and difficult-to-detect HFC refrigerants such as R-134, R-404A, and new R-22 replacements, R410A and R-407C. The MT980 comes with a 400mm long, slim gooseneck probe that is easy to use in hard-to-reach places. The detector is an easy to use one handed operation with thumb controlled tick adjustable knob. The tick sound accelerates when the sensor tip approaches the leak.