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Tablets & Capsules May/June 2021 31 C Ray Spurgeon Eriez Why metal detectors miss metal fragments and how to improve detection quality This article provides three main reasons metal detectors fail to detect metal fragments and explains what you can do to improve metal detection in your facility. ompanies have been integrating metal detection equipment into continuous processing lines for decades. Despite careful attention and sound manufacturing prac- tices, metal fragments still find their way into consumer products. Why does this happen? What can be done dif- ferently? Before answering these questions, it's important to understand the basics of how a metal detector operates. Metal detection basics The heart of a metal detector is the coil. As shown in the exploded view in Figure 1, the coil consists of a trans- mitter coil (shown in red) and two receiver coils (shown

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