Transient Plane Source (TPS)
Materials Solids, Liquids, Paste, and Powder
Thermal Conductivity Range 0.005 to 1800 W/m•K
Directional Measurement Bulk, Through-thickness, and In-plane
Temperature Range -160°C to 1000°C
Accuracy, Repeatability 5%, 2%
Standard ISO/DIS 22007-2.2

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Heat Flow Meter (HFM)
Materials Solids and Loose Materials
Thermal Conductivity Range 0.001 to 0.5 W/m•K
Directional Measurement Bulk
Temperature Range -20°C to 75°C
Accuracy, Repeatability 3%, 1%
Standard ASTM C518

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Transient Hot Wire Liquids (THW)
Materials Liquids and Pastes
Thermal Conductivity Range 0.01 to 2 W/m•K
Directional Measurement Bulk
Temperature Range -50°C to 400°C
Accuracy, Repeatability 5%, 2%
Standard ASTM D7896-14

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Transient Line Source (TLS)
Materials Soil and Soft Materials
Thermal Conductivity Range 0.1 to 5 W/m•K
Directional Measurement Bulk
Temperature Range -50°C to 100°C
Accuracy, Repeatability 5%, 2%
Standard ASTM D5334

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Transient Hot Wire Solids (THW)
Materials Solids
Thermal Conductivity Range 0.01 to 0.2 W/m•K
Directional Measurement Bulk
Temperature Range Room temperature
Accuracy, Repeatability 5%, 2%
Standard NA

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Laser Flash Apparatus (LFA)
Materials Solids
Thermal Conductivity Range 0.1 to 2000 W/m•K
Directional Measurement Through-thickness
Temperature Range -160°C to 1600°C
Accuracy, Repeatability 5%, 2%
Standard ASTM E1461

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Guarded Hot Plate (GHP)
Materials Solids
Thermal Conductivity Range 0.005 to 2 W/m•K
Directional Measurement Through-thickness
Temperature Range -160°C to 100°C
Accuracy, Repeatability 2%, 0.5%
Standard ASTM C177

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Guarded Heat Flow Meter (GHFM)
Materials Solids & Pastes
Thermal Conductivity Range 0.1 to 40 W/m•K
Directional Measurement Through-thickness
Temperature Range -20°C to 300°C
Accuracy, Repeatability 5%, 2%
Standard ASTM E1530

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Guarded Heat Flow Meter - Gasket Material (GHFM)
Materials Solids
Thermal Conductivity Range 0.1 to 1 W/m•K
Directional Measurement Through-thickness
Temperature Range -10°C to 80°C
Accuracy, Repeatability 3%, 1%
Standard ASTM F433

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Guarded Comparative Longitudinal Heat Flow (GCLHF)
Materials Solids
Thermal Conductivity Range 0.2 to 200 W/m•K
Directional Measurement Bulk
Temperature Range up to 1000°C
Accuracy, Repeatability 5%, 2%
Standard ASTM E1225-13

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Physical Properties Measurement System (PPMS)
Materials Solids
Thermal Conductivity Range 0.1 to 20 W/m•K
Directional Measurement Through-thickness and In-plane
Temperature Range -270°C to 100°C
Accuracy, Repeatability 5%, 2%
Standard NA

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Monotonic Heating (MMH)
Materials Solids, Pastes, & Liquids
Thermal Conductivity Range 0.01 to 100 W/m•K
Directional Measurement Through-thickness
Temperature Range -150°C to 1800°C
Accuracy, Repeatability 5%, 2%
Standard ASTM E2584

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Time Domain Thermoreflectance (TDTR)
Materials Solids, Liquids
Thermal Conductivity Range 0.01 – 3000 W/m•K
Directional Measurement Through-thickness and In-plane
Temperature Range 80K – 1500K
Accuracy, Repeatability 10%, 1%
  Calibrations on SiO2, z-cut Quartz, Al2O3, and Silicon

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Steady State Thermoreflectance (SSTR)
Materials Solids, Liquids
Thermal Conductivity Range 01 – 2000 W/m•K
Directional Measurement Through-thickness and In-plane
Temperature Range 80K – 700K
Accuracy, Repeatability 5%, 2%

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Frequently Asked Questions

Q: What is thermal conductivity testing?
Thermal conductivity is a material property that defines the intrinsic ability of a material to transfer or conduct heat. The heat conductivity occurs through molecular agitation and contact, and does not result in the bulk movement of the solid itself. Heat moves along a temperature gradient, from an area of high temperature and high molecular energy to an area with a lower temperature and lower molecular energy. This transfer will continue until thermal equilibrium is reached. The rate at which heat is transferred is dependent upon the magnitude of the temperature gradient, and the specific thermal characteristics of the material.
Q: How to test for thermal conductivity?
There are a number of possible options to measure thermal conductivity, each of them is suitable for a limited range of materials, depending on the thermal properties and temperature. Thermal conduction is the transfer of heat from one part of a body to another with which it is in contact.

Thermtest offers various thermal conductivity testing services. Our thermal conductivity measurement methods cover a wide range of temperature and sample types. If you have any questions about testing, please contact us and we will answer as quickly as possible.

Q: How much do thermal conductivity testing cost?
If you only need a limited number of thermal conductivity tests, then our contract thermal conductivity testing services are what you need. Request a quote today or contact us if you have any questions. We have a full-service thermal testing laboratory to accommodate your thermal conductivity testing needs using the best thermal conductivity measuring methods available.

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