Cold metal detectors are mainly used at metallurgical industrial production line sites. By detecting the movement position of the workpiece, it outputs a switching control signal (contact or level signal) to participate in automatic control.

Cold metal detectors can be divided into two types according to the luminous light source: visible red light cold metal detectors and infrared light cold metal detectors.

Cold metal detectors can be divided into: feedback reflection type (R), through-beam type (T), and direct reflection type (D) according to the detection form.