The Swiss manufacturer Frewitt SA developed a new bead mill NanoWitt-Lab for the wet size reduction of powders down to 50 nm. The NanoWitt-Lab mill is equipped with a recirculation system and uses beads that can be used repeatedly up to 20 times. Concentration of powder in solution can make up from 10 up to 30 % and the total amount of powder – from several mg up to 1,5 kg. A significant advantage of NanoWitt-Lab is the possibility to measure particle size inline.