Testo 317-2 - Gas Leak Detector Including case with belt clip and wrist strap and batteries Highly practical gas leak detector for fast checks on gas pipe connections, with visual bar display. Shows gas concentration in visual bar display Sensor self-test following switch-on Audible confirmation of readiness to operate Increasing alarm sounds with increasing gas concentration Continuous sound if alarm threshold is exceeded Battery monitoring with optical display Self-test function Measuring range - 0 to 10,000 ppm CH4 1st alarm limit - From 200 ppm CH4 2nd alarm limit - 10,000 ppm CH4 Storage temperature = -20 to +50 °C Operating temperature = -5 to +45 °C Battery life = 4 h (LR03) Weight < 300 g