Thermal conductivity measurement

Stationary plate method

• Stationary plate method based on DIN EN 12664
• Surface temperatures and heat flux densities are measured in a stationary state
• Determination of the effective thermal conductivity of homogeneous and inhomogeneous test specimens
• Measurement is carried out in a climatic chamber under defined conditions

Technical data
Samples	Solids plate-shaped with plane-parallel surfaces
Sample dimensions	Area depending on heat flow plates at least - 30 mm x 100 mm - 120 mm x 120 mm - 250 mm x 250 mm Sample thickness depending on thermal conductivity > 10 mm
Temperature range	-10 °C to 60 °C
Measuring accuracy	±6 % for Styrodur reference (≈0.035 W m-1 K-1 )

Transient hot wire method

• Transient method with hot wire for heat supply and measurement of the temperature change
• Determination of thermal conductivity from analytical solution of the heat conduction equation assuming a line source in the infinitely extended body

Technical data
Samples	Powders, bulk solids, liquids, solids (after solidification around probe)
Sample dimensions	Cylindrical measuring container - Diameter 50 mm - Height 200 mm
Temperature range	-10 °C to 60 °C
Measuring accuracy	±5 to ±10 %

Applied Precision Isomet 2114 measuring device

• Transient method for measuring thermal conductivity and volumetric heat capacity
• Insertion probe for powders, bulk solids, solids and contact probe for solids
• Measurement carried out in a climatic chamber under defined conditions

Technical data
Samples	Powder, bulk solids, solids
Sample dimensions	Insertion probe - Diameter min. 40 mm - Height min. 80 mm Contact probe - Diameter min. 60 mm - Thickness min. 40 mm
Temperature range	-20 °C to 70 °C
Measuring accuracy	±5 % in the range 0.015 to 0.70 W m-1 K-1 ±10 % in the range 0.7 to 6.0 W m-1 K-1