OLLI INMETRO gas measurement & warning device 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 plastic housing with three alkali-manganese primary cells. 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 Li-ion battery pack, pump and pressure measurement. Operating time > 50 hours (depending on type & number of installed sensors and ambient conditions, w/o illumination) Measuring ranges depend on the sensor equipment. Dimensions: 136 x 78 x 43 mm Weight: approx. 350 g Explosion-proof measurement device Applied Brazilian standards: ABNT NBR IEC 60079-0 ABNT NBR IEC 60079-1 ABNT NBR IEC 60079-11 Marking INMETRO: Ex db ib IIB Gb T4 DNV 22 0.010 X Temperature range: -20°C <= Ta <= +50°C