A system for traceable measurement of the microwave complex permittivity of liquids at high pressures and temperatures

G. A. Dimitrakis, M. George, M. Poliakoff, I. Harrison, J. Robinson, S. Kingman, E. Lester, A. P. Gregory, K. Lees

Research output: Journal PublicationArticlepeer-review

14 Citations (Scopus)

Abstract

A system has been developed for direct traceable dielectric measurements on liquids at high pressures and temperatures. The system consists of a coaxial reflectometric sensor terminated by a metallic cylindrical cell to contain the liquid. It has been designed for measurements on supercritical liquids, but as a first step measurements on dielectric reference liquids were performed. This paper reports on a full evaluation of the system up to 2.5 GHz using methanol, ethanol and n-propanol at pressures up to 9 MPa and temperatures up to 273 °C. A comprehensive approach to the evaluation of uncertainties using Monte Carlo modelling is used.

Original languageEnglish
Article number045901
JournalMeasurement Science and Technology
Volume20
Issue number4
DOIs
Publication statusPublished - 2009
Externally publishedYes

Keywords

  • Dielectric liquids
  • Dielectric properties measurements
  • Microwave measurement
  • Permittivity measurement

ASJC Scopus subject areas

  • Instrumentation
  • Engineering (miscellaneous)
  • Applied Mathematics

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