The high sensitivity SF6 gas quantitative leak detector Q200Q200 is a portable instrument, including a carrying case, power supply/charger, electronic circuits, built-in compressed argon cylinder, and main display. The detector is located in a handheld gun-style probe, connected to the main display unit via a 2.5-meter cable. The handheld gun-style probe unit has a display to help the user monitor measurement conditions, even in difficult-to-reach positions.