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Designed for measuring pre-explosive concentrations of methane, propane, butane, isobutane, pentane, cyclopentane, hexane, propylene, vapours of methyl and ethyl alcohols, ethane, ethylene, toluene vapours, benzene, acetone, methyl tert-butyl ether, para-xylene, ortho-xylene, vapours of isopropyl alcohol, cyclohexane, heptane, ethylbenzene vapours in a mixture with nitrogen or air, as well as for control of working area contamination with vapours of real industrially used petroleum products (petrol, paraffin, diesel fuel, white spirit, etc.).?.). Field of application - explosive zones of premises and outdoor installations near the process equipment of pumping stations of main gas and oil pipelines, tank farms, loading racks, etc. according to GOST IEC 60079-14-2011 (IEC 60079-14:1996), underground workings of mines, mines and their above-ground structures, dangerous by mine gas and/or combustible dust, other objects of operation according to other normative documents, regulated by the... .