ATEX Zone 0: This is the area within the dipping tank where the explosive/flammable solution is held. ATEX Zone 1: This is the area within the Dip Tank Chamber enclosure which encompasses the dip tank and dryer.ATEX Zone 2:The zone depicted below is a Zone 2 ATEX Zone. This space extends 1.5 meters from the dip tank chamber door and must be free from any source of ignition.