What is a Metal Double-Sheet Detector?

 A Metal Double-Sheet Detector is a sensor-based device for detecting double-sheet issues during automated metal feeding. The system includes a detection controller and sensing probes, with the controller as the control core and the probes as the detection elements.

How does the double-sheet detector work?

Metal Double-Sheet Detector operates on the principle of electromagnetism similar to the Oersted effect. The transmitter probe (T) generates a magnetic field driven by a high-frequency AC signal; the receiver probe (R) senses the field and produces an electrical signal. When material passes through the field between T and R, the received signal varies with the shielding area and thickness of the metal, allowing the controller to determine whether a single or multiple sheets are present.

Application Areas of Single/Double-Sheet Detection Sensors

Metal Double-Sheet Detectors and double-sheet sensors are widely used in automated feeding stages across industries. Typical applications include automated feeding, stamping, bending and cutting of metal parts for household appliances such as air conditioners, refrigerators, washing machines and dishwashers; metal can and lid manufacturing; and other hardware stamping processes. Used with slitting machines, stamping presses, robotic feeders and coating machines, these detectors prevent multiple sheets from entering dies and protect equipment from damage and production loss.

With the growth of the lithium battery and PCB industries, metal double-sheet detectors are also commonly used in lithium battery stacking machines and automated PCB production lines.

Atonm Metal Double-Sheet Detectors are independently developed and manufactured by Atonm. These industrial detectors feature full-metal housings, LED displays and automatic parameter matching to address common double-sheet feeding issues. Beyond common sheet detection, Atonm pioneered solutions for stainless steel stack detection and successfully addressed copper-aluminum mixed-stack detection in major lithium battery projects, earning strong customer recognition for stability and reliability.