When it comes to quality control and packaged product inspection in the food processing industry, it’s pretty obvious that a metal detector would not be a feasible way to detect metal in canned goods. However, it may not be obvious that metal detectors can penetrate low-density aluminum film and may be a good solution for snack packages using this type of packaging.
Because the obvious may not be so obvious, we included in our recently published e-book, A Practical Guide to Metal Detection and X-ray Inspection of Food, a basic summary table of detectable contaminant types by technology. Please note these are general guidelines. Sometimes contaminants can be missed, or foreign objects you weren’t expecting may be found. The best practice is always to test many samples with different contaminants prior to deployment in order to understand how the product and contaminant react in the detection system.