The flameproof indicators are robust electronic indicators built to withstand environmental conditions in hazardous areas. The indicators come approved for use in Zone1 and Zone2 for potentially explosive atmospheres created by gas group IIA, IIB and IIC.
*Zone 1
Zone 1 is an area in which an explosive atmosphere is likely to occur occasionally in normal operation. It may exist because of repair, maintenance operations, or leakage.
*Zone 2
Zone 2 is a place in which an explosive atmosphere is not likely to occur in normal operation but, if it does occur, will persist for a short period only. These areas only become hazardous in case of an accident or some unusual operating condition.