A multi-electrode approach for on-line characterisation of size and shape

Yanmin Zhang, Robert West, Richard A. Williams*, Mark Spink

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


A multi-electrode approach is proposed for on-line characterisation of particle size and shape in dilute particulate suspensions. Based on an electrozone principle, the approach uses four electrodes in a tube rather than two electrodes across an aperture employed in conventional methods. The outer two electrodes are used for current injection, while the inner two electrodes yield voltage measurement. A sensor designed in this way can reduce errors of false counts and oversizing that may occur in conventional methods, thus providing more accurate particle sizing. It is also possible to use the signal slope along with signal peak for particle size and shape characterisation. Both theoretical modelling and experiments were conducted, showing that particle aspect ratio along with particle diameter can be obtained, for example, for cylindrical particles.

Original languageEnglish
Pages (from-to)3-11
Number of pages9
JournalParticle and Particle Systems Characterization
Issue number1
Publication statusPublished - Feb 2003


  • On-line measurement
  • Particle size
  • Shape analysis

ASJC Scopus subject areas

  • General Chemical Engineering
  • Materials Science (miscellaneous)


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