... chrome steel, aluminum, copper and other metallic elements mixed in non-metallic materials. Beside sound and light alarm, the ... conveyor belt metal detector is widely used for belt conveyors in thermal power, cement, coal,paper, mining, forestry, environment ... 2F conveyor Metal Detector error output: Passive relay contact, a normally open,contact point capacity: 5A 220VAC/28V DCtime function: Alarm ...