Hello,
We are currently using metal detectors as our foreign substance control method and it is also a critical control point.
Before I joined, the company had no previous protocol for testing and validating the metal detector which I have aimed to correct by creating one.
We have run in to a problem where the detector can't detect non-ferrous metal or small pieces of stainless steel so the only test piece that it detects is the ferrous one. What's more there is a question about the suitability of metal detection as our control, because our product is packed in a laminate with aluminium in it.
I have little experience with the technologies used in metal detectors so can't give you a lot of details about the machine, but as I understand it there is only one coil in the machine which does the detecting.
My question then would be if there's a way to make the metal detector work with all of the required test pieces and if not, is there a way to justify the use of only the ferrous test piece in our food safety management documents?
If these are not possible I suppose I'll have to think of a way to get the management to buy a better detection system.
Thank you for your time.
Kind Regards
Artturi Oksanen