Features: Detects all standard refrigerants using a heated diode sensor (SF6, HFC, CFC, HCFC refrigerants, halogen gas, ethylene, tetrafluoroethylene, trichloroethylene, and most other compounds containing halogen) User-selectable sensitivity level: Low - 1.05oz (30g) per year, High - 0.2oz (6g) per year Multi-colored LED light bar indicates the level of refrigerant leakage detected 19.8" (50.2cm) flexible gooseneck retains its shape and provides easy access in difficult to reach locations Audible and Visual alert Low battery indicator Convenient field replaceable sensor (RD200-S) Leak Test Bottle included for a quick and easy self test on meter performance Dimensions: Meter - 7.3x2.8x1.4" (185x72x35mm) Sensor with Gooseneck - 20.5" (520mm) long Probe Diameter - 0.32" (8mm) Extech's Refrigerant Leak Detector is easy to use and is ideal for detecting leaks from air-conditioning units and cooling systems that use all standard refrigerants. The multi-colored LED light bar indicates the level of refrigerant detected by the RD200. Features a field replaceable heated diode sensor and Low/High sensitivity range selection for accurate leak detection. The 16" (406mm) flexible gooseneck provides easy access in difficult to reach locations.