The Pellet tester bioenergy TUMBLER+ series complies with all requirements of the international standard ISO 17831-1 (EN 15210-1) ‚determination of mechanical durability of pellets‘. This method has been specified as the reference method for the determination of mechanical durability of wood pellets. Currently, more than 200 devices are successfully in use, worldwide. The instruments are round robin proved.

For each delivered TUMBLER+ an inspection certificate according EN 10204-3.1 is available. 


TUMBLER 1000plus geschlossen kPellets durability tester bioenergy TUMBLER 1000+ according ISO 17831-1 (EN 15210-1)


Portable desktop device for single determinations of the mechanical durability according to the standard. Light weight, easy to handle, easy to clean, counts the rotations and gives remaining test time, self-calibrating, works independently of any fluctuation in power frequency.


  To see a video about determination of mechanical durability of pellets, click here.




Required accessories:

  • balance (at least 2 kg; precision: 0,1 g)
  • 3,15mm round hole sieve


These products are also available in a package deal.