To determine the thermal conductivity after the optical scanning method a heat source and measuring unit is moved along the rock sample. The emitted light and heat emission is focused on the surface of the sample which lead to a heating of the sample. In a defined distance to the heat source two infrared temperature sensors are installed which measure the temperature of the sample before and after the heating. Through the comparison with known standards the thermal conductivity can be determined. The most important components of the measuring device are illustrated in fig. 1. The following figures showing the Thermal Conductivity Scanner (TCS) and the portable Lamda-Messcenter (LMC). A full space and half space line source measuring device (TK-04) is also available to determine the thermal conductivity of hard and soft rocks. Thermal conductivities of sediments or artificial materials with different water saturations can be determined with the help of a modified evaporation test apparatus.
With a C-80 calorimeter the specific heat capacity of solid specimens in a temperature range from 20 to 300°C can be measured.