Product Introduction

The transient thermal conductivity tester (transient planar heat source method) is used to test the thermal conductivity of materials. Based on standards such as ISO 22007-2-2008, GB/T 32064-2015, and GB/T42919.1-2023, it meets the testing requirements of materials in various forms, such as liquids, solid blocks, pastes, powders, and films. The test time is short, ≤160 seconds per sample; the test sensitivity is high, reaching 0.0001.

Measurement Principle

The transient planar heat source method is based on the principle of one-dimensional unsteady-state heat conduction in a plane: a planar heat source in an infinite medium, under initial thermal equilibrium, generates a dynamic temperature field within the medium after being subjected to an instantaneous heating pulse. Using the temperature data generated during the heat conduction process, a function curve is fitted to calculate the thermal conductivity and thermal diffusivity of the sample. During testing, a constant DC current is applied to the heat source, causing a temperature rise on the surface of the heat source and an increase in resistance, resulting in an imbalance in the bridge test system and a change in potential. The temperature increase over time is derived as a function of changes in electrical parameters.

   Solid Testing Fixture                              Paste/Powder Testing Fixture                           Liquid Testing Fixture

Program & Software Application

Digital Control, Higher Precision:

Manual power adjustment and reference settings became less sensitive after repeated use, leading to slight deviations in later test data. Upgraded control components and digital control ensure precise power output, significantly improving test data accuracy, repeatability, and equipment lifespan.

Program Upgrade, Automated Testing:

The program has been completely upgraded, allowing for automatic multiple-cycle testing of a single sample, with results automatically saved.

Software Upgrade, Intelligent Control:

One-click adjustment of power and reference settings, direct control from the host computer, and one-click start of the experiment. Intelligent parameter adjustment for different materials makes operation more convenient and testing more accurate.

FISO 22007 Transient Thermal Conductivity Tester Transient Planar Heat Source Method Material Thermal Conductivity Analyzer