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If have done any traveling by air in recent years, I’m sure you’ve met with metal detectors. Metal detectors are beginning to appear in many more places such as courtrooms, office buildings and even night clubs and schools. They may pose a minor annoyance to us as a visitor, but if you’re in charge of security in a facility, then metal detectors make your job a bit more easier.

As I have personally experienced, a metal detector can have varying levels of sensitivity. For example, I have seen that metal detectors for domestic flights are less sensitive than international flights. For a more precise search, there’s the option of hand held scanners. In Thailand, a security officer found a small coin that somehow got stuck in my wallet using a hand held scanner!

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