The GHFM-01 Guarded Heat Flow Meter is designed to test the thermal resistance and thermal conductivity of both homogeneous and heterogeneous materials such as metals, polymers, composites and pastes from -20 °C to 310 °C. The proprietary testing stack replaces the traditional pneumatic movement with advanced motor control allowing automated control of testing sample thickness, force or pressure applied. The sample is subjected to a steady-state through-thickness temperature gradient and the thermal conductivity is obtained by measuring the temperature difference across it and one additional reference temperature.