In the past year or so, every time I’ve gone through a metal detector at concerts/events, they always say you can bring phones and watches and stuff like that through the metal detector and it won’t set it off.
How can metal detectors not be set off by all the metals in these things?
Are phones and watches made out of different metals than the ones found in weapons?
In: 3
The sensitivity on many metal detectors can be adjusted to largely ignore small personal effects, and operators can be trained to ignore certain highlighted zones if they would correspond to a hand with a watch on it.
The goal is mainly just making sure nobody has a gun or large knife on them.
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