The shell is made of glass-fiber and unsaturated polyester-resin the
interface use curve-sealed structrure,the products have the
excellent functions of impulsion with standing water-proof,dust-
proof,corrosion-proof.
Inside installed ammeter,voltmeter and retarymeter,etc.
Suitable for steel pipe and cable wiring.
Suitable for GB3836-2000,IEC60079 standard request.