Instrumentation issue in indoor air quality measurements: The case with respirable suspended particulates

Jianlei Niu, Brian M K Lu, Thomas C W Tung

Research output: Journal article publicationJournal articleAcademic researchpeer-review

7 Citations (Scopus)


Two fundamentally different instruments are commonly used to measure the concentration of respirable suspended particulates in the indoor environment, one is a gravimetric method, and the other is a light-scattering method. The two methods are specified as alternatives in the current indoor air quality certification scheme in Hong Kong. In this paper, we investigated the correlation between the two methods and subsequently recommended that the gravimetric method should be used as the reference method and the light scattering method for preliminary screening measurements as this can significantly reduce man-hours and also can provide diurnal concentration variation profiles. A similar correlation study should be conducted for instrumentation used for measuring other pollutants, especially regarding total volatile organic compounds.
Original languageEnglish
Pages (from-to)162-170
Number of pages9
JournalIndoor and Built Environment
Issue number3
Publication statusPublished - 17 Oct 2002


  • Indoor air quality instrumentation, gravimetric, light scattering
  • Respirable suspended particulates

ASJC Scopus subject areas

  • Environmental Engineering
  • Public Health, Environmental and Occupational Health
  • Building and Construction


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