Food & Drink Processing & Packaging Issue 32 2021 | Page 38

Leuze ’ s detection expert - the DRT 25C - reliably meets the high requirements of packaging machines with innovative reference technology .
“ As important as cost effectiveness is , so too is making a positive contribution to the minimization of food waste . After all , this is not only an ethical problem for us , but an economical one as well .” Since 2019 , Sesotec is a founding member of the “ SAVE FOOD ” initiative and is actively involved in preventing food waste and loss around the world . This is a joint initiative of the Food and Agriculture Organization ( FAO ), of the environmental program of the United Nations ( UNEP ), of Messe Düsseldorf and of Interpack , the world ’ s leading trade fair for packaging and processes .
The DRT 25C reliably detects from above .
reliably detected ,” explains Andreas Eberle , Key Account Manager Packaging at Leuze . Hermann Sammer from Sesotec adds : “ The problem often manifests itself in the form of multiple triggering - especially at high conveyor speeds .” He has had this experience above all with irregular shapes as occur , e . g ., with fish and meat . This usually involves individual pieces that do not have the exact same length and shape . The same holds for plastic outer packagings of fruit or vegetables .
Sesotec is currently putting the DRT 25C through its paces in the company ’ s
technical center . A wide range of objects and packaging are being used here . The objects travel into the metal detector on the conveyor belt . Prior to entry into the metal detector , they are always detected by the DRT 25C at the front edge and over the entire product length - all from above . “ The view from above is a big advantage . Irregular shapes can thereby be significantly better detected . The sensor solutions currently on the market have so far only been able to perform this task to a limited extent ,” confirms Sammer . Test experiences thus far are very positive . Even in difficult work environments , such as with quickly moving and , in some cases , strongly vibrating conveyor belts .
POSITIVE TEST RESULTS FOR COMPLEX APPLICATIONS The DRT 25C shows it strengths exactly where conventional sensors , which scan from the side , are pushed to their limits . In the test environment at Sesotec , no effort is being spared to test the DRT 25C under “ real ” application conditions in detail : “ After all , it needs to function properly afterwards in our customers ’ application environments and be free of any malfunctions that would slow a machine or system or , worse , bring it to a standstill ,” explains Michael Maier , developer in the product inspection department at Sesotec .
NEW ON THE START LINE : THE DRT 25C FROM LEUZE Leuze ’ s new DRT 25C switching sensor promises to reliably detect every type of object and type of product packaging such as are examined in the food sector with Sesotec metal detectors and checked for contamination . Fully independent of their color , shape and surface structure . Regardless of whether flat , glossy , with openings or transparent . “ Such objects are not so easy to detect using conventional sensors , which scan from the side . Above all because the front edge of packaged products cannot always be 38 FDPP - www . fdpp . co . uk
Michael Maier , Developer in Product Inspection at Sesotec and Michael Schafferhans , Technical Sales Consultant at Leuze .