Passive resonance sensor based method for monitoring particle suspensions

Timo Salpavaara, Matti Järveläinen, Sari Seppälä, Teemu Yli-Hallila, Jarmo Verho, Matti Vilkko, Jukka Lekkala, Erkki Levänen

    Research output: Contribution to journalArticleScientificpeer-review

    7 Citations (Scopus)


    Control of particle suspensions is needed in several modern industrial processes. A reason for the difficulty in this task has been the lack of a fast and reliable measurement. In this study, we tested the measurement of particle suspension by using a method based on a passive resonance sensor. The relative amounts of dispersing agent and aluminium oxide in the suspension were varied. The studied method yielded signals which depended on the complex permittivity of the suspension. The results indicated that we were able to measure information that can be used as feedback for the suspension preparation process. In addition, the tested instrumentation was simple and robust and thus this method may allow online measurements directly from the industrial processes.

    Original languageEnglish
    Pages (from-to)324-330
    Number of pages7
    JournalSensors and Actuators B: Chemical
    Publication statusPublished - 8 Jun 2015
    Publication typeA1 Journal article-refereed


    • Complex permittivity
    • Inductive coupling
    • Passive resonance sensor
    • Slurry
    • Suspension

    Publication forum classification

    • Publication forum level 1

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering
    • Condensed Matter Physics
    • Electronic, Optical and Magnetic Materials
    • Metals and Alloys
    • Surfaces, Coatings and Films
    • Materials Chemistry
    • Instrumentation


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