Testo 316-1 gas leak detector with flexible probe, including bag and batteries. With the testo 316i gas leak detector, you can locate leaks easily and precisely. The acoustic and visual alarm via the multicolor LED on the sensor head and the self-explanatory bar scale ensure simple leak detection. • Acoustic and visual alarm via multi-colour LED on the sensor head and bar indicator on the instrument • Connection to testo Smart App for ppm display and documentation • Sensor self-test and automatic zeroing • Flexible probe for locations that are difficult to access