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Measurements of the electrical conductivity of water.

Jones, R G (2001) Measurements of the electrical conductivity of water. In: BEMC 2001- 10th British Electromagnetic Measurement Conference, 6-8 November 2001, Harrogate, UK.

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The electrical conductivity of water is used in many industries as an indication of the purity of the water. This paper describes a system for the traceable measurement of the conductivity of water in the range 0.01 S/m to 1 S/m. 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 of the conductivity is 2% per Kelvin at 25ºC and this limits the uncertainty of the measurement to about ±0.15% in the present system.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Subjects: Electromagnetics
Electromagnetics > Electrical Measurement
Last Modified: 02 Feb 2018 13:17
URI: http://eprintspublications.npl.co.uk/id/eprint/2164

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