Effect of Operation Pressure on the Response of ePNC Particle Number Concentration Sensor

In this article, we present a method that aims toward an ideal number concentration response of a diffusion charger and diffusion collector-based particle sensor (Dekati ePNC) by using reduced pressure conditions in the sensor. A model is derived for the charger and diffusion collector stage of the...

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Bibliographic Details
Published inIEEE sensors journal Vol. 24; no. 1; pp. 798 - 805
Main Authors Laakkonen, Elmeri, Arffman, Anssi, Rostedt, Antti, Keskinen, Jorma
Format Journal Article
LanguageEnglish
Published New York IEEE 01.01.2024
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Aerosols
air pollution
air quality
Atmospheric measurements
diffusion battery (DB)
diffusion charger
effect of pressure
Electrostatic measurements
environmental monitoring
Instruments
Ions
Mathematical models
nanoparticles
particle charging
Particle measurements
Pressure effects
Sensor phenomena and characterization
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Summary:In this article, we present a method that aims toward an ideal number concentration response of a diffusion charger and diffusion collector-based particle sensor (Dekati ePNC) by using reduced pressure conditions in the sensor. A model is derived for the charger and diffusion collector stage of the sensor, as well as for the total particle number concentration (PNC) response. The derived model is validated with experimental characterization measurements in different operation pressures. The experimental results show that reduced operation pressure makes the sensor response less dependent on particle size, approaching pure particle number response. The obtained results improve the feasibility of the diffusion charging-based method in the measurement of PNC.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2023.3329519