Using a small bead-in-glass thermistor probe as a heating element
an apparatus was developed for measuring thermal conductivity of liquids by the transient method. The apparatus was calibrated by using seven standard substances at 25℃
with an average deviation of measurements less than 2%. To check the reliability of this apparatus and the correlation proposed
the thermal conductivities of thirteen known liquids were determined. The experimental results showed that all deviations were within 2% except one which reached 5%. The precision of the apparatus is 0.2%. This paper expounds the principle of the proposed method and discusses the experimental results.