Thermal conductivity

Measuring devices for determining thermal conductivity and thermal diffusivity

There are various ways to determine the thermal conductivity, thermal diffusivity and specific heat capacity, depending on the material to be analyzed, the measuring temperature and the required accuracy.

The most common way to determine the thermal diffusivity is the laser or laser flash method (LFA). The laser flash method can be used in a very wide temperature range (-125°C to 2800°C) and in almost the entire thermal conductivity range.

The Transient-Hot-Bridge method (THB) is a heating wire method optimized by the Physikalisch-Technische Bundesanstalt (PTB), with which the thermal conductivity, thermal diffusivity and specific heat capacity can be determined within less than a minute. The thermal conductivity measurement range extends from insulation materials to ceramics and metals.

The Heat Flow Meter (HFM) is a classic plate device that is mainly used for the quality control of insulating materials. The HFM can be used to determine thermal conductivity with the highest possible accuracy.

For thin film samples (nm to μm scale), LINSEIS has developed the new thin film laser flash (TF-LFA) and the universal chip-based thin film analyzer TFA (Thin Film Analyzer).

Linseis thermal conductivity series

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Overview of applications and samples

Below you will find an overview of the various measuring instruments for thermal conductivity. This should serve as a guide for you. If you have any questions about a measurement or a material, you can send us a message at any time using the contact form.

Green: Measurement possible

Measurement possibly possible

Gray: Measurement not possible

DEVICE

LFA

TIM-TESTER

THB

HFM

TFA

TF-LFA

InfoMost universal measuring deviceFor Thermal Interface MaterialsQuick and easy measurementsFor insulating materialsThin films on Linseis chipThin films from nm to μm
Measurements
Thermal conductivity
Thermal diffusivity
Specific heat capacity
Specific thermal resistance
Determined pressure on the sample
Atmospheres
Temperature range-125°C up to +2800°C-20°C up to +300°C-150°C up to +700°C-40°C up to +90°C-170°C up to +300°C-100°C up to +500°C
Price€€ – €€€€€€€€€€€€€
Samples
Solid
Liquid
Powder
Paste
Pad
Thin film

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