Anna Susz This email address is being protected from spambots. You need JavaScript enabled to view it., Pascal Pratte, Catherine Goujon-Ginglinger

Philip Morris Products S.A., CH-2000 Neuchâtel, Switzerland

Received: November 27, 2019
Revised: July 3, 2020
Accepted: July 20, 2020

 Copyright The Author's institutions. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited. 

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Susz, A., Pratte, P. and Goujon-Ginglinger, C. (2020). Real-time Monitoring of Suspended Particulate Matter in Indoor Air: Validation and Application of a Light-scattering Sensor. Aerosol Air Qual. Res. 20: 2384–2395.


  • Commercial online sensors are lacking of reference method for PM measurements.
  • The common approach for online PM sensors validation is needed.
  • Using right calibration for various aerosols is mandatory to obtain reliable data.


Since the 1950s, awareness of the impact of air pollution on human health has been growing. Of the many recognized air pollutants, suspended particulate matter has received the most attention, as both PM2.5 and PM10 can affect humans upon inhalation. Consequently, PM monitoring is critical to linking indoor pollution and exposure, and a validated measuring instrument is essential. Portable monitors, which track temporal changes in the aerosol mass concentration in real time, are a faster alternative to offline gravimetric techniques, which provide only averaged values. Hence, this study evaluated the performance of the DustTrak DRX aerosol monitor in assessing indoor air quality and validated its ability to measure complex aerosols. Three DustTrak units were used to measure different aerosols, e.g., ambient air, polystyrene latex (PSL) spheres, and environmental tobacco smoke (ETS), and the results were compared to those obtained with the standard gravimetric method. Notably, the bias of the DustTrak relative to the gravimetric method for ETS measurements ranged from 2% to 15% when a photometric calibration factor (PCF) of 0.38 was applied. Additionally, the working range of the tested units was established, and the limits of detection and quantification were found to be 5 and 15 µg m3, respectively. Finally, in order to serve as an alternative to the gravimetric method, these instruments must be accredited for PM measurement in accordance with standards such as ISO 17025.

Keywords: DustTrak DRX; PM2.5; PM10; Suspended particulate matter; Environmental tobacco smoke (ETS).

Aerosol Air Qual. Res. 20 :2384 -2395 .  

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