The Zetasizer Nano S90 is the perfect lower cost solution when the ultimate in sizing sensitivity is not necessary, or where identical results to a legacy system with 90 degree scattering optics are required. Size measurement from 0.3nm (diameter) to 5 microns using 90 degree scattering optics. Molecular weight measurement down to 9,800Da. A Quality Factor and Expert Advice System gives the confidence of having an expert at your shoulder. 21CFR part 11 software option enables compliance with ER/ES. Research software option gives access to further features and analysis algorithms for the light scattering specialist. Automation of measurements using an autotitrator option. Alternative laser, 50mW at 532nm for samples incompatible with the standard 633nm laser fitted. Optical filter option to improve measurements with fluorescent sample. Temperature range extension option to 120°C. Systems can be upgraded to add zeta potential at a later date.