Does aluminum foil get detected in a metal detector?

Aluminum foil is not likely to be detected by metal detectors. However, if you use X-rays, you will notice a big black void in the suitcase and will be forced to open it. As a result, aluminum foil can't be used to cover something else at the airport.



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Information. Aluminum foil is 98.5% aluminum with the balance primarily from iron and silicon to give strength and puncture resistance. The molten alloy is rolled thin and solidified between large, water-cooled chill rollers.

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Airport x-ray machines see right through aluminum foil (so, for instance, you can't hide a knife inside of foil) and in general, you can bring solid food through TSA (but no liquids or gels over 100 ml / 3.3 ounces).

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Metal detecting at low tide will give you the best chance of finding objects. However, be sure to check the tides before you start detecting so that you don't get caught out by the rising water. Be respectful of the beach and its wildlife. Avoid digging in areas where there are plants or animals.

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