Single Particle Light-Scattering Technology® (SPLS), a technology which records light that is scattered into into forward and sideward directions by single nano- and micro particles while passing a laser beam of a special beam cross-section.

Single particles are lined up in a single line by hydro-dynamic focusing in an optical flow cell. This way, a sample flow in the middle and a surrounding sheath flow are created by means of pressure differences. The sheath flow creates a kind of fluid wall for the sample flow and prevents mechanical blockages. The cross section of the sample flow can be adjusted dynamically (by factor 35) with no changes to the mechanical parts.

This allows you to work in a wide sample concentration range.


When a single particle crosses the laser beam, the light is scattered in all directions. Forward and sideward scattering of light are recorded simultaneously by means of two photomultipliers, and are analyzed in real-time after amplification and digitization.

The scattered light intensities determined for each particle are sorted in more than 1 million bins and displayed as high-resolution bar-chart stating the count distribution on an easy-to-use touch screen. Classified intensities are converted into particle size distribution density based on the Mie theory.

Measurement, data storage and analysis are powered by software platform SEPView®.

SPLS-Technology® enables you to get a deep insight into complex nano- and submicro-particulate systems, which helps you to design tailored particles and dispersions.