48V Smoke Detector For Electronics Room Fire Security. It can be oprated DC 48V with electronics panel. It is widely used for Telecom or Mobile's machine room, electronic panel room or computer room of factory or electric power. When it detects smoke, the detector sent a relay signal to fire alarm system to remind with LED lit on. Features: 4 wire interconnection 48V DC powered Frosting plastic High sensitivity To Set NC or NO Description: Working voltage: DC48V Static current: