Handheld metal detectorThe handheld metal detector is a kind of metal detector, which is named because of the way it is used. The following is a detailed introduction to the handheld metal detector: 一、Working principleThe hand metal detector works on the principle of electromagnetic induction. When

Working Principle of Security Walk-through metal detector (WTMD)WTMD works through the principle of electromagnetic induction, the internal transmitting coil generates a low-frequency alternating electromagnetic field, when the personnel carries the metal object through, the metal object will be ind