R. Tobazeon et al., ON THE MEASUREMENT OF THE CONDUCTIVITY OF HIGHLY INSULATING LIQUIDS, IEEE transactions on dielectrics and electrical insulation, 1(6), 1994, pp. 1000-1004
The present increasing interest for accurate conductivity measurements
on highly insulating liquids is underlined. Criteria for valuable mea
surements are recalled. An apparatus using a new technology is briefly
described. It allows us to perform a number of experiments and it is
shown that accurate measurements of the conductivity of highly insulat
ing oils can now be obtained at room temperature. Experiments carried
out in an extended range of electrode gap distance from 0.7 to 7 mm, a
nd of voltage from 0.1 to 100 V, demonstrate that we do measure the vo
lume conductivity of the liquid. From a practical point of view, it is
concluded that laboratory or in-line measurements on highly insulatin
g oils can also be made using small volume of liquid or small electrod
e gap distance.