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For number concentration measurements of superfine particles a condensation nucleus counter (CNC) is frequently used. The combination of a new CNC module with a white light aerosol spectrometer and a passive collector makes possible accurate time-resolved determination of particle number within the overall size range of 10 nm to 40 m and at concentrations up to 105 particles/cm3. With the aerosol spectrometer a high time-resolved particle size determination is also possible in the size range of 0.3–40 m up to the same high number concentrations of 105 particles/cm3.
The combination of a new CNC module with a white light aerosol spectrometer and a passive collector makes possible accurate time-resolved determination of particle number within the overall size range of 10 nm to 40 m and at concentrations up to 105 particles / cm3. With the aerosol spectrometer a high time-resolved particle size determination is also possible in the size range of 0.3-40 m up to the same high number of concentrations of 105 particles / cm3.