Thermal conductivity by the guarded hot plate apparatus


© Fraunhofer IBP
Fraunhofer IBP Fotografie Windkanal und Dämmtestprüfstand
Measurement Thermal conductivity λ, thermal resistance R, and thermal transmittance U
Standards DIN EN 12664, DIN EN 12667, DIN EN 674, DIN 52612
Measurement object                                                                                      
Homogenous plates, inhomogeneous test specimens: porous, fibrous or granular materials, components laminated, profile plates, glazing elements, sections of building bricks

Technical data

Measuring surface 100 mm × 100 mm, 150 mm × 150 mm and 500 mm × 500 mm
Test specimen dimensions Square specimens with side lengths between 120 and 900 mm and thicknesses between 5 and 300 mm
Mean specimen temperature −160 up to +250 °C, depending on the equipment        
Measuring range Thermal conductivity between 0.01 and 2.0 W/(m∙K)

Special features

Measuring setup Horizontal and vertical direction
Ambient conditions Measurements in vacuum or in a protective atmosphere possible


The test laboratory is recognized by the Deutsches Institut für Bautechnik (DIBt) as a testing facility under applicable building regulations LBO No. BWU10 and as a Notified Body No. 1004 to the terms of the Regulation of Construction Products (EU-BauPVO). It has been granted flexible accreditation under DIN EN ISO/IEC 17025 by the Deutsche Akkreditierungsstelle GmbH (DAkkS) under accreditation No. D‑PL‑11140‑11-04.

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