Suitable for detecting and separating metal foreign objects in free falling particles and powder like bulk materials, detecting all magnetic and non-magnetic metals including iron, copper, aluminum, non-ferrous, and stainless steel, effectively avoiding production equipment damage or shutdown caused by metal doping in materials. Its structure is compact and easy to install, and the probe can be integrated into the equipment pipeline. The suction machine and vibrating screen can be combined according to production needs to achieve higher production efficiency and detection results.