A simple and inexpensive dilution system for the TSI 3007 condensation particle counter

Knibbs, Luke D., de Dear, Richard J., Morawska, Lidia, & Coote, Peter M. (2007) A simple and inexpensive dilution system for the TSI 3007 condensation particle counter. Atmospheric Environment, 41(21), pp. 4553-4557.

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The aim of this study was to develop a dilution system which would permit the TSI 3007 Condensation Particle Counter (CPC) to operate within its maximum detectable concentration threshold, even when sampling extremely high submicron particle concentrations. The intention of this was to provide a better alternative to coincidence correction factors, which have several limitations; the most significant of which being that they are only applicable to a comparatively low concentration and also that the components of the unit are exposed to concentrations beyond their operating specifications. To achieve the aim, a bifurcation based system was developed and tested repeatedly at concentrations of unleaded petrol combustion particles up to ~8.5×106 p/cc. The benchmark particle concentration was measured by a TSI 3022A CPC. The results of the tests showed that the nominal dilution ratio based on flow partitioning was applicable up to ~3.5×105 p/cc, after which particle losses to a capillary tube caused a large increase in apparent dilution. These losses were consistent throughout all tests and allowed the unit to remain below the maximum detection threshold, even under the extreme challenge concentrations encountered. This work represents a useful extension of the operating range of the TSI 3007, without significantly compromising either the quality of data collected or the internal components of the unit.

Impact and interest:

12 citations in Scopus
11 citations in Web of Science®
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ID Code: 8752
Item Type: Journal Article
Refereed: Yes
Keywords: TSI 3007, Condensation Particle Counter, Dilution, Submicron, Particle Measurement
DOI: 10.1016/j.atmosenv.2007.03.019
ISSN: 1352-2310
Subjects: Australian and New Zealand Standard Research Classification > PHYSICAL SCIENCES (020000) > OTHER PHYSICAL SCIENCES (029900) > Physical Sciences not elsewhere classified (029999)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Copyright 2007 Elsevier
Copyright Statement: Reproduced in accordance with the copyright policy of the publisher.
Deposited On: 23 Jul 2007 00:00
Last Modified: 29 Feb 2012 13:32

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