Aerosol Research
Aerosol Research
Aerosol Research
Articles | Volume 4, issue 1
Articles | Volume 4, issue 1
https://doi.org/10.5194/ar-4-255-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/ar-4-255-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 4, issue 1
Research article
 | 
19 Jun 2026
Research article |  | 19 Jun 2026

An intercomparison study of optical particle size spectrometers for aerosol number size distribution measurements

Sébastien Bau, Vincent Crenn, Joris Leglise, Sébastien Jacquinot, Christophe Debert, Denis Petitprez, Valentine Bizet, Lara Leclerc, Alain Miffre, Danael Cholleton, Alec Rose, Alexandre Tomas, Amel Kort, Didier Hebert, Aurélie Joubert, Florence Deschamps, Sébastien Ritoux, Lyes Ait Ali Yahia, and François Gaie-Levrel

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Short summary
This study reports on an inter-laboratory comparison to assess particle number size distributions of three test aerosols using 35 optical particle size spectrometers from 16 partners over 40 weeks. Most measurements clustered near the control, confirming that such devices generally provide reliable size distributions. Calibration history, size resolution, particle morphology, and differences in refractive index between calibration and test aerosols are part of the biases observed.
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