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For the detection of foreign material in packed products, or the detection of embedded foreign bodies in bulk products, the IXUS x-ray sorter offers the best solution. As opposed to the former optical sorting techniques, x-rays have the ability to travel through an object, depending on its density. When an X-ray source is placed on one side of the product, and X-ray sensors on the other side, the X-rays that pass through the object can be measured, and variations in density can be detected. A piece of metal wire or a small rock will absorb more X-rays than a raisin or a nut, creating a clear contrast between the good product and the foreign object. A big advantage of X-ray sorters compared to metal detectors is that X-rays can be used to inspect the inside of packages packed in aluminum foil. On top of that, the advanced image processing technology used in the IXUS makes shape recognition possible for the detection of missing items and pits in stone fruits.
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