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Review

Review of the Newly Developed, Mobile Optical Sensors for Real-Time Measurement of the Atmospheric Particulate Matter Concentration

Department of Electrical and Information Engineering, Polytechnic University of Bari, 70125 Bari, Italy
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Author to whom correspondence should be addressed.
Academic Editors: Adam Glowacz, Jose A Antonino-Daviu, Zhixiong Li, Muhammad Irfan and Wahyu Caesarendra
Micromachines 2021, 12(4), 416; https://doi.org/10.3390/mi12040416
Received: 3 March 2021 / Revised: 25 March 2021 / Accepted: 26 March 2021 / Published: 9 April 2021
(This article belongs to the Special Issue The Future of Microsystems for Smart Cities)
Due to the adverse effects on human health and the environment, air quality monitoring, specifically particulate matter (PM), has received increased attention over the last decades. Most of the research and policy actions have been focused on decreasing PM pollution and the development of air monitoring technologies, resulting in a decline of total ambient PM concentrations. For these reasons, there is a continually increasing interest in mobile, low-cost, and real-time PM detection instruments in both indoor and outdoor environments. However, to the best of the authors’ knowledge, there is no recent literature review on the development of newly designed mobile and compact optical PM sensors. With this aim, this paper gives an overview of the most recent advances in mobile optical particle counters (OPCs) and camera-based optical devices to detect particulate matter concentration. Firstly, the paper summarizes the particulate matter effects on human health and the environment and introduces the major particulate matter classes, sources, and characteristics. Then, it illustrates the different theories, detection methods, and operating principles of the newly developed portable optical sensors based on light scattering (OPCs) and image processing (camera-based sensors), including their advantages and disadvantages. A discussion concludes the review by comparing different novel optical devices in terms of structures, parameters, and detection sensitivity. View Full-Text
Keywords: mobile monitoring; air quality; particulate matter; air pollution; low-cost particle device; optical particle sensors; scattering techniques; image processing methods mobile monitoring; air quality; particulate matter; air pollution; low-cost particle device; optical particle sensors; scattering techniques; image processing methods
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MDPI and ACS Style

Molaie, S.; Lino, P. Review of the Newly Developed, Mobile Optical Sensors for Real-Time Measurement of the Atmospheric Particulate Matter Concentration. Micromachines 2021, 12, 416. https://doi.org/10.3390/mi12040416

AMA Style

Molaie S, Lino P. Review of the Newly Developed, Mobile Optical Sensors for Real-Time Measurement of the Atmospheric Particulate Matter Concentration. Micromachines. 2021; 12(4):416. https://doi.org/10.3390/mi12040416

Chicago/Turabian Style

Molaie, Sama, and Paolo Lino. 2021. "Review of the Newly Developed, Mobile Optical Sensors for Real-Time Measurement of the Atmospheric Particulate Matter Concentration" Micromachines 12, no. 4: 416. https://doi.org/10.3390/mi12040416

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