- Grading Machines


Potatoes and onions almost always have to be sorted according to size as part of their processing. Depending on their use, the determining factor will either be the greatest accuracy or the highest capacity. Grisnich has the perfect solution for both choices.


  • capacity up to 55 ton/hour

  • extremely solid

  • 3 - 5 sorting pans

  • unique power per sorting pan

  • life cycle 15 – 40 years

Precision Grader

  • drive with stop moment

  • Individually hung and driven sieving pans 

  • adjustable sieving pans (for maximum capacity or accuracy)


  • roller sorter

  • star wheel sorter

  • diabolo roller sorter

Optical sorting

The optical sorting of products is a relatively new development. Grisnich has the requisite knowledge in this field and can provide optical sorting as a system integrator.

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