For pinpointing leakages in buried gas pipes by means of a borehole probe. The measured concentration of up to nine boreholes can be visualized and stored in the device. The O2 reading will be displayed if the sensor is configured as well (separate option). The option can only be configured in combination with a sensor array to measure CH4 (Option 282102 or 282134) and the integrated pump (282100). Measurement ranges: - CH4: 0-100 Vol.% - O2: 0-25 Vol.% (optional) Resolution: - CH4: 0.1 Vol.% - O2: 0.1 Vol.%