Thermophysical properties can be simply defined as material properties that vary with temperature without altering the material's chemical identity. However, it has become customary to limit the scope of the term to properties having a bearing on the transfer and storage of heat.

A more comprehensive definition is that thermophysical properties are all material properties affecting the transfer and storage of heat, that vary with the state variables temperature, pressure and composition (in mixtures), and of other relevant variables, without altering the material's chemical identity. These properties will include thermal conductivity and diffusivity, heat capacity, thermal expansion and thermal radiative properties, as well as viscosity and mass and thermal diffusion coefficients, speed of sound, surface and interfacial tension in fluids.

Details of Thermal Measurement Services can be found at Thermal Performance.