The benefits of automatic metal detector testing

Traditional methods of testing gravity fed metal detectors and those installed on Vertical Form Fill and Sealing (VFFS) packing lines typically involve frequent and time-consuming stoppages, potential risks to operator safety and often generate inconsistent results. In many cases, the test methods used do not confirm that the operational specification of the metal detector is being achieved.

BY MIKE BRADLEY, Global Head of Sales (Metal Detection) Mettler-Toledo Product Inspection

The “Drop-Through”, “Fishing Line” and “Test Rod” methods are all routine performance monitoring test processes for vertical metal detection inspection systems. Manual testing often requires teams of operators to put their safety at risk by climbing ladders and reaching over machinery so that they can drop or insert test samples into a throat or gravity-fall metal detector. These test processes are unable to accurately verify the operational specification of the metal detector. This is because they do not confirm centerline testing – the least sensitive part of the metal detector – as the placement of test samples passing through is generally random. In addition, manual testing processes can carry cross-contamination risks and can potentially compromise food product quality, as the test samples come into direct contact with the product. Fortunately, new…

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Food & Beverage Reporter (Digital) - 1 Issue, June 2022

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