The Thermal Constants Analyzer is a non-destructive precision analysis of thermal transport properties including thermal conductivity, thermal diffusivity, and specific heat capacity.  The analyzer operates on a wide variety of sensors with radius from 0.5 mm to 30 mm. The test machine operates by pulsing energy into a circular disk sensor and reading a difference in resistivity values over time. These values change as heat is introduced to the material under test. There are two main differentiations between material types. Those that are Isotropic: meaning (the properties are the same in all directions i.e. metals) or Anisotropic: meaning (properties are not the same in all directions i.e. carbon fiber composites). The software for this machine allows RFAL to determine properties for both Isotropic and Anisotropic materials.


  • Contact resistance between sensor and sample does not influence measurement results
  • Porous and transparent samples are easy to test without modification
  • Surface roughness or color does not influence measurement results
  • Minimum or no sample preparation time
  • Double-sided testing for maximum accuracy
  • Three thermal transport properties testing in a single transient
  • No calibration or reference sample required

thermal constants analyzer

thermal constants analyzer


System Specifications
Manufacturer HotDisk
Type / Model TPS 2500 S
Thermal Conductivity 0.005 to 1200 W/mK
Thermal Diffusivity 0.1 to 700 mm2/s
Measurement Time 1 to 1280 seconds
Reproducibility Typically better than 1%
Accuracy Better than 5%
Temperature Range -253℃ to 1000℃
Additional Software Module Anisotropic

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Thermal Constants Analyzer