How metal detection equipment detects metal residues on food

In food testing, although there are strict management procedures in the production process, and corresponding protective measures have been taken to prevent the mixing of metal foreign matter, it cannot be completely ruled out. Metal mixing caused by raw materials, such as residual broken needles in meat, nails, fish hooks, staples, etc. mixed in powdered raw materials; man-made causes, such as buttons, coins, keys, rings, necklaces, etc., by Caused by on-site repairs, forgotten screwdrivers, nuts, screws, welding slag during welding, insufficient cleaning of metal chips, etc., and also caused by works in the workshop, such as rust from aging equipment, old defective pieces, Parts on conveyor belts, broken pieces of stainless steel screen, slicer and crusher blades, etc. are all culprits for metal intrusion (I once provided metal detector services for a tea factory.

How to detect these metals mixed into products? The earliest giant magnet placed above the food conveyor belt is the prototype of the metal detector. When the metal foreign matter in the product flows with the product on the conveyor belt, it can be attracted by the strong attraction of the needle detector magnet, but its limitation. Sex is only able to detect metals that are magnetic in themselves. Therefore, metal detectors with more perfect performance are well used with the improvement of detection requirements.