A comparative study of the advantages and problems associated with the different available techniques for the determination of the thermal conductivity of melts at temperatures up to 1500 C was undertaken. This showed that all existing techniques were incapable of achieving the precision required by the ateel, non-ferrous, glass and other industries.
A new non-interactive technique based on the measurement of thermal dissipation into a reusable sensor implanted into the container wall was however considered viable in terms of the requirement. A feasibility study has therefore been launched to validate the approach.
Although the project is still in progress, the new sensor has been shown to be both stable and to have a sufficiently high signal to enable the high temperature thermal conductivity of the liquid to be determined. When perfected the performance of this sensor will be compared with that of conventional techniques.