Walkthrough metal detector employ pulse induction technology. Each pulse produces a brief magnetic field. A reflected magnetic field created when a piece of metal passes through a magnetic field. If someone walks through the metal detector and sets off the alarm. security is notified that this person may be concealing a dangerous metal-based weapon. Multiple coils in multi-zone walk-through metal detectors create separate detection zones. With systems up to 33 zones available.

Latest metal detectors have multiple zones that sound an alarm and also tells the security the location of metal object. They have proven to be a secure and effective method of security.

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