Malvern’s Zetasizer family uses Dynamic Light Scattering (DLS) to size particle in suspension in the sub-micron size range and also measure surface charge on particulates.




The fundamental principle is to detect flashes of laser light scattered by randomly moving particles and use Stokes-Einstein calculate the hydrodynamic diameters from their velocity.

Zetasizer is the best-known name in sub-micron particle sizing. Zetasizer systems have been in use since the early 1990’s and are simply the best performing, easiest to use and best selling DLS systems in the world. Core to the current series is the Zetasizer Nano – a compact instrument in various optical configurations. New models include the dedicated WT for process applications and the new Pro and Ultra models.

Zetasizer Products  Zetasizer Technologies
Zetasizer Nano for zetapotential and sub micron sizing Dynamic Light scattering (DLS) for sizing
Zetasizer Pro with adaptive correlation Zeta Potential and Electrophoretic light scattering
Zetasizer Ultra with MADLS and concentration mode Static Light Scattering for molecular weights
Nanosampler Size Exclusion Chromatography (SEC)
Autotitrator; Planar Cell PDF  for solid surface measurements
Zetasizer WT for on-line Zp measurements