SHIEL3D is a thermal conductivity measurement instrument - based on a space technology - that can determine the thermal conductivity of thermal insulation materials in a matter of minutes and in an extended temperature range from -250°C (cryogenic materials) to 1000°C (fire-resistant materials). The device consists of a thin heating element, which excites the material to be tested with a current of varying frequency from 100 Hz to 1 mHz. The response of the material to the current excitation is recorded in the form of minute voltages which yield the thermal conductivity of the material. The transient nature of the test method means multiple samples can be tested in a single working day making the device suitable for material developers as well as quality control of materials.