Automatic Conveyor Needle Detector 1.Japanese technique, anti-disturbance computer chip integrated circuit2 ... detect the broken needle, or Fe, it will alarm by sound and light, the engine will stop and return to ... 10levelDetection Width600mm & custom-build machineDetection Height120mm & custom-build machineAlarm MethodAlarm by sound & light, machine stops, conveyer returns, then restarts againPower ...