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Sensors 2016, 16(3), 399;

A Micro Aerosol Sensor for the Measurement of Airborne Ultrafine Particles

State Key Laboratory of Precision Measurement Technology and Instrument, Department of Precision Instrument, Tsinghua University, Beijing 100084, China
School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China
Author to whom correspondence should be addressed.
Academic Editor: W. Rudolf Seitz
Received: 18 December 2015 / Revised: 1 March 2016 / Accepted: 16 March 2016 / Published: 18 March 2016
(This article belongs to the Section Chemical Sensors)
Full-Text   |   PDF [1576 KB, uploaded 18 March 2016]   |  


Particle number concentration and particle size are the two key parameters used to characterize exposure to airborne nanoparticles or ultrafine particles that have attracted the most attention. This paper proposes a simple micro aerosol sensor for detecting the number concentration and particle size of ultrafine particles with diameters from 50 to 253 nm based on electrical diffusion charging. The sensor is composed of a micro channel and a couple of planar electrodes printed on two circuit boards assembled in parallel, which thus integrate charging, precipitating and measurement elements into one chip, the overall size of which is 98 × 38 × 25 mm3. The experiment results demonstrate that the sensor is useful for measuring monodisperse aerosol particles with number concentrations from 300 to 2.5 × 104 /cm3 and particle sizes from 50 to 253 nm. The aerosol sensor has a simple structure and small size, which is favorable for use in handheld devices. View Full-Text
Keywords: ultrafine particles; number concentration; particle size; micro aerosol sensor ultrafine particles; number concentration; particle size; micro aerosol sensor

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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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Zhang, C.; Zhu, R.; Yang, W. A Micro Aerosol Sensor for the Measurement of Airborne Ultrafine Particles. Sensors 2016, 16, 399.

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