Thermal Diffusivity & Conductivity

LFA 427

Laser Flash Apparatus / Pyrometer version for up to 2800°C 

Laser Flash technique over the broadest temperature range

Thermal conductivity and thermal diffusivity are the most important thermophysical material parameters for characterizing the thermal transport properties of a material or component. The Laser Flash technique is currently the most widely accepted method for precise measurement of the thermal diffusivity and the LFA 427 is the number one instrument on the world market.
High precision and reproducibility, short measurement times, variable sample holders and defined atmospheres are outstanding features of LFA measurements over the entire application range from -120°C to 2800°C.

A special version with a pyrometer allows measurements from room temperature to 2800°C.

The thermal conductivity of disk-shaped samples of ceramic, glass, metals, melts and liquids, powders, fibers and multi-layer materials ranging from vacuum insulation panels to diamonds is measured with equal speed and accuracy. The temperature-dependent measured thermal diffusivity value along with the corresponding specific heat (DSC 404 F1 Pegasus) and density (DIL 402 C) data are used to calculate the thermal conductivity.
The laser power, pulse width, gas and vacuum are variable over a wide range, making it possible to set the optimum measurement conditions for the very different sample properties.

The LFA 427 is the most powerful and versatile LFA system for research and development as well as all applications involving characterization of standard and high-performance materials in automobile manufacturing, aeronautics, astronautics and energy technology.

Technical Data

Temperature range
-120°C to 400°C, RT to 1300°C, RT to 1575°C, RT to 2000°C, RT to 2800°C 
(5 furnace types)
Heating- and cooling rates
0.01 K/min to 50 K/min (dependent on furnace)
Laser power
25 J/pulse, (adjustable power and pulse duration)

Contactless measurement of temperature rise
with IR detector

Measuring range:
0.01 mm2/s to 1000 mm2/s
(thermal diffusivity)

Measuring range:
0.1 W/mK to 2000 W/mK
(thermal conductivity)

Sample dimensions:
6 mm to 12.7 mm diameter (20 mm special version), 10x10 mm square
0.1 mm to 6 mm thickness

Sample holder:
Al2O3, graphite

Liquid metal holder:

Sample holder for liquids:

inert, oxidizing, reducing, static, dynamic

High vacuum-tight assembly
up to 10-5 mbar


Scan the QR-Code with your smartphone

 You still have questions and would like to be contacted by our sales department? Would you like to receive a quote for the product? Do you need a poster or brochure for one of our products? Just Scan the QR-Code!