Engineered to meet the demands of today’s research laboratories, high sensitivity dynamic light scattering system requires only 5µl of sample and provides results in seconds. It has a small, bench-top footprint, and offers rugged durability. The system provides size and molecular weight measurement of proteins, biomolecules and nanoparticles. The system’s stabilized anti-back reflection optical design brings optimized measurement performance, and makes the system immune to reflections and permanently mechanically stable. A patent-pending cuvette combines the convenience of a disposable sample holder with the measurement quality of a quartz cuvette.