I'm not working in seafood processing, but in my short experience, you should do a risk assessment of each process step and do the decision tree of HACCP. But also, if you are working with equipment of metal or stainless steel is more likely that the presence of metal occur in your product.
I'm working in a Frozen product company and we used Mettler Toledo metal detector, they work very well and the same supplier provides training and maintenance of equipment.
if you no have any idea for which sensitivity you need to use, I recommend you follow the requirement of your consumers, obviously if your consumer isn't the final consumer otherwise you should do a risk assessment about that. FDA have information about foreign material, maybe it can help you.
Sorry for my writing English, I'm learning yet.
Good morning SafetyLine
As part of our HACCP, our risk assessment determined that metal detection is a CCP, as we do manual filleting. So there's a possibility of metal fragments chipping or breaking off.
I'm in talks with Mettler Toledo but they're saying that meeting the 2.5 mm stainless steel requirement is not acquirable. They've recommended x -ray which comes at a higher cost.
Whether this hazard exist or not and what control strategies can be applied depends on your process. If processing is manual (fillet knives), and there is not a metal conveyor, then generally there is no hazard to likely occur. An alternative strategy per the Hazards Guidance (Ch. 20 attached) is to examine equipment for breakage and malfunctions.
As far as the sensitivity of detection it will depend on the aperture of your MD. Seafood being both wet and often treated with salts and other preservatives can increase product conductivity, and hence product signal noise and difficulties in a good phase-out. A 2.5 SS test is not unreasonable, however it will certainly play a key roll in designing a system. Any MD manufacturer worth their salt will know all of these variables and help you design a working system. A MD system required for a 6kg mahi fillet will certainly have difficulties meeting that sensitivity as opposed to a 130gm mackerel fillet.
We are using a Loma IQ4 Flex System for crab products with 2.0 Fe, 2.5 NonFe, 3.0 S/S 316
Chapter 20 Metal Inclusion.pdf
Good morning Slab,
Our processing is manual, Thanks for the attachment,
Most metal detector manufactures are having trouble meeting the sensitivity level for stainless steel during their sampling process (of my products - Fillets).
I will look into Loma.
With respect to HACCP, you didn't mention if a FS Standard or Regulatory factors are also involved. It can matter.
SS has low magnetic properties so difficult to detect compared to ferrous, for example.
Here are some typical sensitivities -
Good morning Charles,
Our HACCP was modified due to this customer requirement. For them, metal detection is a CCP, and stainless steel needs to be a 2.5 mm.
If it helps, what I should've asked is " is anyone using a metal detector system in a cold environment, using a 2.5 mm SS sensitivity as their setting? And if so, who manufacturer that equipment?" I've reduced aperture height to tighten the space, but all the supplier I've reached out, don't see the 2.5 mm SS being met.
I also started recently taking the seafood haccp course to implement a haccp plan for repacking dried ground and whole shrimp. What I will have to ask from our supplier is the processes they went through to produce it. for example if they grind the ground shrimp I am assuming it involved metal. So I would wanna count metal as a CCP. So bottom line is that you have to look at your entire process to determine if it is a CCP and not just assume. Hope that helps!
Good morning FS,
in our case, we are the supplier, so we have to meet this customer requirement. We've had a rental unit (metal detector) which meets the requirements but seems to be manufactured out of the country. Looking to purchase one, we are looking at our supplier within the US territory. Last resort would be to purchased one from out of the country (more risk in having a tech come out and work on if needed).