One used Malvern Nano-Z Zetasizer particle size analyzer, model ZEN2600, serial# MAL1224555, built 10/2019.
One used Malvern ZEN2600 Nano-Z Zetasizer/Zeta Potential Analyzer, Model ZEN-2600
One used Malvern Nano-Z Zetasizer particle size analyzer, model ZEN2600, serial# MAL1224555, built 10/2019.