Proprietary sensor with lifetime of more than 300 hours of operation (ten years of normal use) Detects all commercially available HFC, HFO, HC, HCFC and CFC refrigerants as well as blends and newly approved replacements such as R-22 and R-1234yf Triple-redundant leak indication (loud fast beep, bright flashing LED, digital leak size reading) True mechanical pump draws in samples, increasing sensitivity Three sensitivity levels Fast warmup Comfortable neoprene grip Automatic calibration and reset to ambient levels Mutable beeper Garage-durable construction Made in U.S.A. SAE J2791 and J2913 certified Complies with European standard EN 14624 CE, RoHS, WEEE approved