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Estimation of the Particle Sizing Error Due to Particle Position in an Integrated PM2.5 Optical Particle Counter

Carinthian Tech Research, Europastraße 12, 9524 Villach, Austria
ams AG, Tobelbaderstraße 30, 8141 Unterpremstätten, Austria
Author to whom correspondence should be addressed.
Presented at the Eurosensors 2018 Conference, Graz, Austria, 9–12 September 2018.
Proceedings 2018, 2(13), 850;
Published: 4 December 2018
(This article belongs to the Proceedings of Eurosensors 2018)
PDF [626 KB, uploaded 4 December 2018]


An increasing need for portable personal time- and size-resolved monitoring of the fine airborne particulate matter drives the development towards miniaturization and cost reduction of the optical particle counters. In an integrated design of the optical particle counters, the confinement of the air is becoming more critical, since variations in particle positions are getting bigger relative to the dimensions of the sensor. Variations in particle position directly affect the light collection angle and hence induce the particle sizing error. We have developed a 3D simulation framework based on a Lorentz-Mie theory and analyzed the effect of particle position on the particle sizing error. We show that the relative sizing error induced by particle position is detrimental and seriously limits the sizing performance of downscaled PM2.5 sensors.
Keywords: optical particle sensor; PM2.5; particle sizing error optical particle sensor; PM2.5; particle sizing error
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Pribošek, J.; Röhrer, G. Estimation of the Particle Sizing Error Due to Particle Position in an Integrated PM2.5 Optical Particle Counter. Proceedings 2018, 2, 850.

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