- Designed for Explosive Atmospheres Zone 1 and Zone 2; - Designed for Combustible Dust Zone 21 and Zone 22; - Designed for IIA, IIB and IIC Groups Explosive Atmospheres; - Designed for Temperature Classifications T1~T4; - Designed for Explosive Hazardous Locations Such as Oil Refinery, Storage,Chemical, Pharmaceuticals, Textile, Painting, Military Industries, Etc.