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*Gas leak detector including case with belt clip and hand loop, self-test function and batteries *Key Features: *Shows gas concentration in visual bar display *Sensor self-test following switch-on *Increasing alarm sounds with increasing gas concentration *Audible confirmation of readiness to operate *Overview *Highly practical gas leak detector for fast checks on gas pipe connections, with visual bar display. *What's included: *testo 317-2 gas leak detector, including carrying bag with belt clip, wrist strap and battery.