Detailed Product Description CONVEYOR TYPE NEEDLE DETECTORApplication: Automatic conveyor magnetic induction metal detector can use it to ... , aluminum, zinc, paper, rubber, chemicalsetc ON-688GS Automatic conveyor metal detector can detect the needle and ferrous of sewing ... minDetection Method MagneticAlarm,Automatic buzzer and alarm lamp, the conveyor will stop or return.L×W×H Dimensions1670×1100× ...