Automatic Conveyor Needle Detector 1.Japanese technique, anti-disturbance computer chip ... fabrics, embroideries, kimono, beddings, towels, carpets, gloves, toys and handicrafts, etc.Features:Japanese technique, anti-disturbance computer chip integrated ... touching-type, easy to operateCan calculate the qualified and unqualified amount Detection MethodMagnetic field induction, digital circuitDetection ...