Foreign material detection systems
Putting a foreign material detection system in place is very important. Consider this: in investigations conducted over a period of about a quarter century; the FDA Health Hazard Evaluation Board found out that less than three per cent of objects of the size of over six mm were said to present no hazard. Also, around fifty per cent of objects in the range of one to six mm pose a limited acute hazard, meaning that even such small objects are essentially unsafe.
Look for shape and size
So, when taking foreign material detection system into consideration; two things to consider are the size of the object and the shape of the object. The mid-size range of objects is the one to worry about, because objects that are too small may not really be a health hazard, and very large objects are usually identifiable, and can be removed. Yet, when they are consumed; large objects can cause a choking hazard and a small, sharp object can cause a laceration, tooth damage or internal mouth injury.
Devices to be implemented
- Sieves and filters: obviously, one should go for a sieve or filter that filters undesirable particles and allows particulates of the desired size to get through.
- Entoleters: these are indispensable for the grain industry
- Magnets: these are particularly useful on mechanically manufactured ingredients which have not been tested earlier.
- Metal detectors: it could have an alarm and auto reject and lock box system. Highest concentration should be given to the smallest sizes, those varying from 1.5 mm ferrous, 2.5 mm nonferrous and 2.5 SS.
- X-rays are useful for detecting objects such as bone or plastic, or anything that changes the density of the product.
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