The welas^® digital 1000 aerosol sensors can measure particles from 120 nm to 40 µm reliably and precisely regarding their size and associated concentration.

The particularly powerful xenon high-pressure lamp with very high light intensity and the photomultiplier to receive the scattered-light signals are integrated directly into the aerosol sensor. This technique offers the best size resolutions, classification accuracy, and a particularly low detection limit of 120 nm.

The measurement volume size is crucial for coincidence-free particle size and particle number measurement. The welas^® aerosol sensors are equipped with various sizes of measurement volumes and can therefore be optimized for particular particle concentrations for coincidence-free measurement. This offers the advantage of a high particle rate and an excellent statistical confidence level in various concentration ranges.