Feature: - Detects SF-6 in high voltage circuit breakers. - Detects cleaning agents used in dry cleaning applications. - Detects leaks in other systems and storage/recovery containers. - Detects Ethylene Oxide gas leaks in hospital sterilizing equipment. - Detects halogen gas and most gases which contain chlorine, fluorine and bromine. - Detects all kinds of halogenated refrigerants including but not limited to CFCs, HCFCs, and HFCs. - With precise ultra-low power consumption IC design, can be automatically adjusted to the best optimum detecting state. Operation Instruction: - Install 4 x AAA battery(not included) - Turn the knob clockwise to turn on the leak detector, after 6 seconds, it turns into stand-by mode and begins to beep regularly. Then you can start detecting the leak. - The detector will beep regularly at a slow frequency when turn it on. If leak detected, it will beep in a higher frequency. (2 beeps per second when the detector is open, 10 beeps per second when detect the leak - The sensitivity increases from 1 to 7 in sequence - This Freon leak detector is designed with corona sensor so the probe should be very close to the gas leak area. - Widely applied on pipe leakage, automobile air conditioner, cold storage, refrigerator repair and so on. Specification: Reset the time: 2-10 seconds Working temperature: 0 C ~ 52 C. Maximum sensitivity: 6gr/yr(halogen refrigerants). Battery life: about 50 hours under normal use. Response time: instantaneous Preheating time: about 6 seconds. Operating mode: continuous, unlimited Fixed probe length: 20cm (7.87 inches) Dimension: 22.9 cm x 6.5 cm x 6.5 cm (9.01 x 2.56 x 2.56 inches). Electricity source: DC6V , 4 x AAA batteries(not included)"