Gas measurement & warning device with certified measuring function for explosion protection. This variant of the OLLI is included in the BG RCI list of function-tested gas detectors (see article 280000 for the variant without certification). Explosion-proof & compact diffusion hand-held measuring device. It can be used for up to 5 combustible and toxic gases as well as oxygen and comes in an extremely rugged 2C synthetic housing with rechargeable and explosion-proof Li-ion battery pack. Charging the battery in potentially explosive atmospheres is not permitted! Up to 3 gas sensors can be installed (Ex/Ox/Tox). Assembly is based on customer requirements. The device can optionally be equipped with a pump and pressure sensor. Operating time > 50 hours (depending on type & number of installed sensors and ambient conditions, w/o illumination) Measurement ranges are subject to sensor assembly Dimensions: 136 x 78 x 43 mm Weight: approx. 350 g Explosion-proof measurement instrument (active & passive) Measuring function certified for methane (CH4), propane (C3H8), oxygen (O2), carbon monoxide (CO), carbon dioxide (CO2), hydrogen sulfide (H2S) according to the following standards: EN 60079-29-1 EN 50104 EN 45544-1 EN 45544-3 Marking: II 2G Ex ib db IIB T4 Gb (EU-)type examination certificates: BVS 17 ATEX E 043 X TÜV 21 ATEX 8596 X TÜV 21 PTG 7001 X 968/FSP 1940.05/21 Temperature range: -20°C <= Ta <= +50°C