The LB-550V operates on the basis of dynamic light scattering. It allows for the precise measurement of nano particles in a size range from 1 nm to 6000 nm and a concentration range from ppm up to 40% solids. A very effective detector with a photomultiplier ensures the reliable measurement even of particles which scatter light only weakly such as proteins and polymers.
Thanks to the temperature-controlled cell holder and integrated viscosimeter, the LB-550 V allows optimum control of the measurement conditions without error-prone manual interfaces.
The analyzer is used for the measurement of fine suspensions, emulsions, all kinds of colloids and brines in aqueous and organic media.

Built-in viscosimeter
For unknown samples, the integrated viscometer helps to directly measure and compensate for variations in viscosity which can significantly affect the measurement results.

Function Principle

The focal point of the laser beam is brought as close as possible to the inner wall of the cell. This suppresses the effects of multiple scattering in highly concentrated samples and still provides sufficient signal strength for lower concentration samples because the scattered light is not attenuated by passing through a large volume of the sample dispersion.

The angle of irradiation into the cell is also carefully controlled, eliminating the effects of stray and reflected light. This increases the signal-to-noise ratio and the ability of the LB-550 to measure diluted samples.

Subject to technical modifications and errors