Comparison of Sampling Efficiencies of a Laser Particle Counter and an Aerodynamic Particle Sizer

Xinlei Wang, Yuanhui Zhang, Gerald L. Riskowski

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Particulate sampling plays a very important role in indoor air quality and occupational exposure assessments. Most of the sampling instruments are designed and calibrated at standard conditions. But in real applications, they are used under different atmospheric conditions. The error can be so large that the results are misleading. In this paper, the sampling efficiency theory was reviewed, and laboratory and field experiments have been performed to determine the effect of sampling efficiency on particulate measurements for types of particle instruments: a laser particle counter (LPC) and an aerodynamic particle sizer (APS). It was observed that there was substantial difference in the sampling efficiency between the two sampling instruments. The results showed that the sampling tube and connectors had a significant effect on the sampling efficiency because of impaction and deposition. In the worst case, the sampling efficiency of APS with a sampling tube can be reduced to 10% of that without any tube and connectors for certain size of particles. It is strongly recommended that the sampling efficiency be evaluated before tests are conducted in real applications.

Original languageEnglish (US)
Title of host publication2000 ASAE Annual International Meeting, Technical Papers
Subtitle of host publicationEngineering Solutions for a New Century
Pages3927-3945
Number of pages19
Volume2
StatePublished - 2000
Event2000 ASAE Annual International Meeting, Technical Papers: Engineering Solutions for a New Century - Milwaukee, WI., United States
Duration: Jul 9 2000Jul 12 2000

Other

Other2000 ASAE Annual International Meeting, Technical Papers: Engineering Solutions for a New Century
CountryUnited States
CityMilwaukee, WI.
Period7/9/007/12/00

Keywords

  • Particulate measurement
  • Sampling efficiency

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Wang, X., Zhang, Y., & Riskowski, G. L. (2000). Comparison of Sampling Efficiencies of a Laser Particle Counter and an Aerodynamic Particle Sizer. In 2000 ASAE Annual International Meeting, Technical Papers: Engineering Solutions for a New Century (Vol. 2, pp. 3927-3945)