Walkthrough gates also known walkthrough metal detectors are widely used equipments at the checkpoints at secured locations. These are designed to be precise with high sensitivity to detect the targets, and the gates are with multiple zones that detect the presence of metals and create an audible alarm and light using LED’s. The metals such as iron (Fe), nickel (Ni) and cobalt (Co), copper (Cu), brass (Br) and aluminium (Al) are detected easily by the walkthrough gates. These gates can detect practically all types of metal (including gold, silver, platinum and all ferrous or aluminium alloys). These devices are provided with the counters, to show the count of people crossing the gate. And such counters are usually on the crossbar while as these gates have several adjustments (beep volume, detection sensitivity) and a reset button.
The walkthrough gates utilised the laws of relation between electricity and magnetism.
The precision of detection of targets need to be adjusted & such options are made available in the walkthrough gates otherwise the walkthrough gates will ignore very small amounts of metals like the button on your jeans or small earrings or small pins. In addition to the precision and sensitivity adjustment, the alarm & vibration mode, alarm model only and vibration mode only can be adjusted. The batteries, chargeable or disposable are used to keel handheld metal detectors up and running.
The walkthrough gates are certified to pose not any health risk to individuals especially with the safety of screening procedures with hand-held metal detectors among patients with implanted cardiac rhythm devices sometimes can become the concern. The case reports suggest that the walkthrough metal detectors used for security screening generate electromagnetic fields that may interfere with pacemaker and implantable cardioverter-defibrillator (ICD) function. The security gates did not affect the function of pacemakers or ICDs and are in general certified for the same so that the use of hand-held metal detectors for security screening is probably safe for patients with pacemakers, pregnant women and ICDs
The general specifying factors considered while selecting the walkthrough metal detectors are
- Portable or permanent fix
- Detection zones, in general from 6 to 33 zones
- Passage size
- Weatherproof housing standard IP55, IP65
- Material used for construction
- Regulatory information
- Remote control operation
- Networking mode