Specific conductivity and ionic product of water between 50 and 271 °C

The specific conductivity of high-purity water has been measured at temperatures between 51° and 271°C along the saturated vapour pressure curve. Correction has been made for traces of contamination. The frequency dispersion of the impedance of the water-filled cell has been analyzed in terms of an equivalent electrical circuit. The data have been used to calculate the ionic product constant of water over this temperature range.