Food & Drink Process & Packaging Issue 21 2018 | Page 15

Typically, you can expect to pay in the conditioners, this can drive up energy detector can run for 20+ years. Fortress region of £4,000 to £18,000 for a consumption. Replacing generators and Technology can even upgrade its robust metal detector, depending on the size sensor can also be quite costly. entry level Phantom metal detector with and complexity of the application. Yet, additional data capture features from its compared to £35,000, potentially in In contrast, metal detectors are Stealth model should food factories need excess of £80,000, to install x-ray, the designed to be more robust in extreme to comply with retailer codes of practice. price difference is quite considerable. environments, e.g. freezers, wet Additionally, the price differential processing plants such as fish packing, Finally, depreciation of the equipment between metal detectors and x-ray and when dry ingredients are prevalent, should be factored in. Safety and liability systems increases incrementally such as flour in bakeries and food concerns often means that that x-ray according to the size of the aperture. manufacturers that use or pack spices systems have limited or poor resale value. and seasonings. Of course, other factors may outweigh A common mistake when calculating Total cost considerations. Cost of Ownership is overlooking running The costs associated with product costs for the lifetime of inspection changeovers, in addition to the floor equipment and factoring in more subtle space occupied by the inspection costs such as interruption to production, equipment, are also essential when doing machine testing, training and support, TCO calculations. and hidden vendor costs. These after- purchase costs can be substantial and it’s Legacy inspection systems have a quite customary for x-ray running costs reputation for being expensive to to be much higher than metal detectors. maintain. To avoid scrapping good kit prematurely, investigate the upgrade For example, if the x-ray system requires options. Realistically, with the right cooling systems, such as fans or air maintenance, a well-built metal STUDY THE MACHINE’S SENSITIVITY Global consumer awareness about food integrity combined with the stricter enforcement of regulatory standards by producers and manufacturers is accentuating demand for highly sensitive inspection equipment. Many factors impact sensitivity in both x-ray and metal detectors, including aperture size. FDPP - www.fdpp.co.uk 15