The Hot Disk TPS 3500 is the ideal instrument for testing thermal conductivity, thermal diffusivity and specific heat of any kind of solid or liquid. Solids suitable for testing with a TPS 3500 can be dense, porous or in powder form, isotropic or anisotropic, conducting or insulating, transparent or opaque. Liquids can be thick and sticky, low viscosity solvents or anything in between. All this is achieved without the use of contact fluids, light-absorbing sample surfaces or fixed sample geometries. Each Hot Disk TPS 3500 is tailored according to application specifications and can be paired with a selection of temperature control accessories. To guarantee best possible performance, the controlling software is continuously updated and improved.