Detection Technology Many food manufacturers are unaware that the metal detectability of any metal containing foreign body will depend on a number of things (Figure 1), including the; • vibrations (physical and electronic) • metal content of the contaminant, both the quantity and type of metal • size of the metal containing contaminant • orientation of the metal containing contaminant • food product signal – size, composition etc. • food packaging • speed of the conveyor belt • detector used • detector calibration. Consequently, the detection of metal containing contaminants is not guaranteed. For further information please see technical data at our website and read our whitepaper: Metal detectable plastics in cleaning tools - does it reduce foreign body risk? Physical/ electronic vibrations Food product signal · Water content · Salt · Grease · Packaging · Bones · Frozen · Etc. Conveyor speed Figure 1. *Interference factors affecting metal detectability Aperture size Detector type Bristle fragment size/ orientation/ position in the food Metal content Detection threshold
Download PDF file