Specifications:Detectable Gases: R-134a, R-404A, R-407C, R-410A, R-22, etcSensitivity:6g/yearAlarm Method: Buzzer alarm, LED bar IndicatorDetection Tube Length:15 inch (390mm)Warm-Up Time:90 sec Battery:1.5V AA x4Dimensions:173 x 66 x 56mm Weight:400gRefrigerant leakage detector is the perfect tool for maintaining the air-condition or acooling system with compressor and refrigerant. The unit used newly developedsemi-conductor sensor which is extremely sensitive to variety of general used refrigerant.Features:semi-conductor sensor which is extremely sensitive to variety of general used refrigerant.Features:•Microprocessor control with advanced digital signal processing•Multi color visual display•High-Low leak sensitivity selector•Low batter indication•Semiconductor gas sensor•Detection of R-134a, R-410A, R-407C, R22, etc•15" (39cm) flexible stainless probe•Reference Leak source included•Ambient concentration reset