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Measurement of the electrical conductivity of water.

Jones, R G (2002) Measurement of the electrical conductivity of water. IEE Proc. Sci. Meas. Technol., 149 (6). pp. 320-322.

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The electrical conductivity of water is used in many industries as an indication of the purity of water. A system for the traceable measurement of the conductivity of water in the range 0.01 S/m to 1 S/m is described. The method is based on the measurement of the resistance of a column of water of accurately known dimensions. There is an electrode polarisation effect and the convention is to extrapolate the conductivity as a function of inverse frequency to find the value at zero inverse frequency. The temperature coefficient is 2% per Kelvin at 25ºC and this limits the uncertainty of the measurement to about ±0.14% of the value in the present system.

Item Type: Article
Subjects: Electromagnetics
Electromagnetics > Electrical Measurement
Last Modified: 02 Feb 2018 13:17
URI: http://eprintspublications.npl.co.uk/id/eprint/2539

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