Device Groups for More Safety
Like the devices, gases, vapors, and dust are divided into various groups according to their properties. This division simplifies the right selection of devices for the various gases, vapors, and dusts.
Until the standard EN 60079 0:2009 was introduced, devices permitted in hazardous zones were divided into two groups. Since it came into force, it has been three: groups 1, 2 and 3.