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
Metal detectors have a sensitivity rating that can be turned up or down.
Something like a gun will be more easily detected because they are usually made of a big chunk of dense steel vs a phone which is typically made out of thin aluminum.
Depending where you go the sensitivity of the scanner will vary. Airports in the US for example are notorious for having different sensitivity ratings depending one which line you go through to get checked.
If you look suspicious they can send you to the scanner that’s more sensitive which is guaranteed to go off if you so much as have change in your pocket and then they’ll search you.
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