designed in particular to shield from x ray radiation which is used for scanning in the scanner 2 for this purpose the housing can be partially made of lead in addition the housing 16 can have attached shielding curtains covering the supply and discharge openings for the food products 4 5 6 7 the housing 16 is in fig1 shown relatively short in the conveying direction f but can also extend over the entire or almost the entire length of the conveyor tracks arranged upstream and downstream fig2 shows how a first food product 4 is conveyed through the scanning area 3 of the scanner 2 for this purpose the drive of the conveyor tracks 8 and 12 are activated by a control unit so that the conveyor tracks 8 and 12 convey the food product 4 resting on them in particular the first food product 4 is conveyed only on the conveyor track 8 until it reaches the scanning area 3 the food product 4 is then conveyed at substantially constant speed through the scanning area 3 and onto the downstream conveyor track 12 in this at least one property of the food product 4 is determined with the scanner in particular the food product 4 is irradiated and the data thus determined is stored in dependency.