The Pellet tester bioenergy TUMBLER R 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.