Yes. Metal detectors are not limited to finding only magnetic items. They also work on all types of metals, including aluminum, stainless, coper and bronze, hence the name.
The term "metal detector" (MD) generally refers to some type of electromagnetic induction instrument, although traditional magnetometers are often used to find buried metal.
But unlike magnetometers, MD produces a response from nonferrous objects such as aluminum, copper, brạss, or conductive foil.
Learn about the basic concept of metal detectors at US Environmental Protection Agency.
Nothing escapes the metal-detecting prowess of airport security systems—not even something as miniscule as a foil wrapper. Many manufacturers of chewing gum, candy, and cigarettes have caught on and made the transition from metallic wrap to paper, but the hold-outs can put a kink in your smooth passage through airport checkpoints.
Check out ways (including aluminum foil wrappers) you may unknowingly set off security measures, shared by Budget Travel.