Gas leak detector testo 316-1 range 0 - 10.000 ppm CH4Ideal for tracing leaks in pipes, flanges, screw connectors, gas pipes etc.For methane. With visual and acoustic alarm. Sensor has extremely short reaction time. Technical specifications: Range 0 to 10.000 ppm CH4 Alarm threshold >200 ppm LED yellow / >10.000 ppm LED red Battery life >5 h Working temperature 4 to 45 °C Dimensions (L x W x H) 190 x 57 x 42 mm Weight 300 gDelivery incl. battery (9 V).