Arch metal detectors are stationary or mobile devices that detect metal objects carried through them. They are made in the form of an arch or frame, there are models made in the form of one or two panels without a connecting crossbar. Metal detectors are capable of completely scanning a person or large objects.

What types of arch metal detectors are there

There are many classifications of metal detectors. They differ in the number of detection zones, the method of generating a magnetic field, the class of moisture protection of the case, the set of detection functions, throughput, etc. There are models with additional integrated modules, such as a video recorder, a radiation module, an uninterruptible power supply module.

Operating principle

The operation of the metal detector is based on the use of radio waves. One antenna panel sends a specially generated radio signal to another, which receives it and sends it back. The materials being scanned are resistant to electromagnetic and radio waves, so the signal, passing through them, loses its strength or does not pass the waves through itself at all. When meeting an object on the body of a person moving through the metal detector, the radio waves are reflected from it and return faster than other signals. The microprocessor of the metal detector records the time of reflection of radio waves, if the speed of reflection indicates a metal barrier, the light and sound alarm is triggered.

Application

Arch metal detectors are easy to use, have relatively small dimensions and weight, and therefore have become widespread at transport infrastructure facilities, municipal facilities, government agencies and other public places where inspection activities are required.