Klein Tools ET160 Refrigerant Gas Leak DetectorKlein Tools ET160 Klein Tools ET160 is an easy to use Refrigerant Gas Leak Detector that provides audible and visual alarms in the presence of CFCs, HFCs, HCFCs, and blends. Detect as low as 100 ppm of common refrigerant gases. Features automatic zero point calibration, hold, mute, and low battery indicator. Refrigerant gas leak detection of CFCs, HFCs, HCFCs, and blends from 100 ppm to 3000 ppm 18 Inch gooseneck probe for easy access around equipment