Netzsch Fine Particle Technology’s latest Zeta RS stirred media mill is now installed in its Exton, PA-based technical laboratory and is available for testing. The updated Zeta RS is equipped with an advanced media separation system and improved mechanical seal system that allow the mill to handle the smallest grinding media and enable the mill to grind particles as small as 50 nm. The Zeta RS is available in four chambers sizes, ranging from two liters to 25. Its new tilting feature allows for easier loading and unloading of grinding media.