OLLI gas measurement & warning instrument Explosion-proof & compact handheld gas measurement instrument as diffusion 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 3 alkaline manganese primary cells. Up to 3 gas sensors can be installed (Ex/Ox/Tox). Assembly is based on customer requirements. Moreover, a pressure sensor can be installed. The instrument can be equipped with an optional secondary cell and/or optional pump. Operating time > 20 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, marking: II 2G Ex ib db IIB T4 Gb BVS 17 ATEX E 043 X Temperature range: -20°C <= Ta <= +50°C