Metal detector

Through a central transmitting coil and two equal receiving coils, the three coils are installed in a detection head. The oscillator emits a high-frequency magnetic field through the middle transmitting coil, which is connected to the two receiving coils, but with opposite polarity. When the magnetic field is not disturbed by the outside world, the voltage output signals they generate cancel each other out. Once metal impurities enter the magnetic field area, the signals output by the two output coils cannot be canceled out, and the metal detector can detect the presence of metal. Applications Metal detectors are typical instruments for controlling metal foreign bodies. They are metal detection devices for food packaging and material transmission lines. They are widely used in various fields, such as food processing, medical, and safety industries. They can be used to detect metal foreign bodies in food, such as needles, wires, and fragments. They can also be used to detect metal impurities in medical devices or medicines to ensure product quality and safety.