The DMS500 uses electrical mobility measurements to produce particle size / number spectra between 5 nanometres and 2.5 micrometres. Since the classification of particles according to their differing electrical mobility takes place in parallel (rather than in series as in a scanning instrument) the DMS series is able to offer the fastest available size / number spectral measurement of its type.

The user interface processes the spectral data in real-time to output particle mass, surface area or number as well as basic spectral information.