Checking cleared trays for the presence of dishes


Before they are fed into the washing machine, cleared meal trays are checked to ensure that they are actually empty. During this process, both empty as well as any full glasses must be detected. Needed for this purpose is a robust sensor that can reliably detect transparent and other objects in this very humid environment.


The RK18 retro-reflective photoelectric sensor with reflector is used. With this sensor solution, it is possible to determine whether a tray is empty or still full. But there is more: it can also reliably detect transparent objects, such as empty glasses.


  • Branch/Area

    Material Handling (continuous conveyor)

  • Duty

    Machine protection / collision prevention, Presence inspection

  • Application

    Checking cleared trays for the presence of dishes