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Conveyor style metal detection using multiple field directions

23 March 2020

Fortress Technology has introduced a metal detector designed to inspect low profile, high value products vertically and horizontally concurrently. 

The Interceptor DF (Divergent Field) is believed to be the first multi-orientation, multi-scan food metal detector. It is sensitive to very thin metal contaminant flakes and foils that can be difficult to detect on low profile foods, including chocolate, confectionery, nutrition bars, cookies and biscuits. 

The Interceptor DF can also be used to inspect small thin packages of conductive products like cheese and deli-meats.  Rather than scanning a select number of frequencies, the conveyor-style system can inspect raw, cooked and packaged products using multiple field directions. 

To increase food safety, it addresses several previous limitations – notably orientation, size, geometry and position of metals and is said to offer a reliable solution to detecting very thin flakes and foils. 

The Fortress system uses multiple coil sets to instantaneously drive the electromagnetic fields in different directions. Rather than missing a metal contaminant because it hasn’t aligned with a specific field, the Interceptor DF looks for signals over a broad spectrum, from multiple angles. The stronger disturbance from one field compensates for the weaker signal from another. This is said to increase the probability of identifying and rejecting products containing non-spherical metals by over 100%.


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