Under normal circumstances, such products cannot be detected by ordinary metal detectors. The function of metal detectors is to detect metals. If the packaging contains metal components, it will interfere with the detection results.
It is easy to solve this problem. We can carry out metal detection on the product before packaging to avoid the influence of packaging on the detection, so as to directly detect the product itself, which is no different from ordinary detection methods. But this also has a disadvantage that it cannot be guaranteed if metal is mixed between detection and packaging. In order to solve this problem, we can use aluminum foil metal detector, which is a product that can be used to detect metal in packaging, even if there is metal in the packaging, it will not affect the detection results.