Elitech HLD-200 Refrigerant Gas Halogen Leak Detector Checker HCFCs HFCs with Replaceable Sensor Provides 7 levels of sensitivity to set the real-time cycle adjustment Visual display and single light diode displays the leak degree in large range Detects all kinds of halogenated refrigerants.Battery checked function with tricolor display Requires 2 AA Alkaline batteries (not included).Easy operation with push button Auto reset testing when the detector is turned on Visual display and single light diode displays the leak degree in large range in the form of &#034;gradually lights the light&#034;. Providing 6 levels of sensitivity to set the real-time cycle adjustment. Easy operation with pushbutton Battery checked function with tri-colour display Detect all kinds of halogenated refrigerants The high effective true mechanical pumping provides positive airflow through sensing tip,which can improve the sensitivity and response speed.