Fragments and powder So-called 2-phase tests are used to determine the thermal conductivity of fragments and powder. For a 2-phase test, the sample material is mixed with a fluid of known thermal conductivity (usually water) and the thermal conductivity of the mixture is measured. Then the thermal conductivity of the sample material is calculated from the test result, the known thermal conductivity of the fluid and the volume shares of solid material and fluid in the mixture. For 2-phase tests we recommend the half-space probe HLQ 88 and our special sample container available whose inner diameter exactly matches the size of the probe. Instructions for 2-phase tests are available for download in PDF format.

Soil samples The thermal conductivity of soil samples exhibits a strong dependency on the thermal conductivity of the matrix material, on pore volume and on moisture content. Hence knowledge of these parameters is important for the correct interpretation of test results. Additionally, testing soil samples usually is a more demanding task than testing solids. We have compiled some helpful information regarding testing of soil samples including detailed instructions and a measuring example for you to download.

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