19
DS440IS
2.3.2
Compatibility
Once the zones and substances have been classified, the equipment can be chosen with protection
systems suitable for these zones/substances.
2.3.3
Surface or underground
The weighing instruments described in this manual are suitable for use on the surface (group II).
2.3.4
Categories of equipment
The appliances are classified in categories, depending on their safety (1, 2, 3).
There is also a breakdown in equipment for the presence of dust (D = Dust) and gas (G = Gas).
Danger zone
Categories under Directive
ATEX 2014/34/UE
Equipment Protection Level
Gas, mist or vapours
Zone 0
1G
Ga
Gas, mist or vapours
Zone 1
1G or 2G
Ga or Gb
Gas, mist or vapours
Zone 2
1G, 2G or 3G
Ga, Gb or Gc
Dust
Zone 20
1D
Da
Dust
Zone 21
1D or 2D
Da or Db
Dust
Zone 22
1D, 2D or 3D
Da, Db or Dc