1.1 and Zone 2 hazardous gas areas; 
 . II A, II B, II C, Class T1-T6 group explosive gas or vapor environment; 
 Need a fire alarm sites; 
 4 indoor and outdoor (IP54 IP65 *). 
 Features 
 An aluminum alloy shell die casting, molding, spray the surface, pleasing in appearance; 
 2 built-in explosion-proof button, explosion-proof lights and other components; 
 (3) cable or steel wiring.