Trade name
FOX 50 Heat Flow Meter, TA Instruments. ASTM C518 and ISO 8301 standards
Technical description

Purpose: a measuring set for determining the thermal conductivity coefficient for testing solids (rocks, building and insulation materials). The subject of the measurement is the coefficient of thermal conductivity, and on its basis the possibility of calculating and constructing maps of surface heat flux density distribution.

A plate apparatus with a thermally insulated heating plate is used for the tests. The test is based on the steady-state heat flux method, in which the heat flux through the material sample is constant and the temperature of the sample at each point is fixed. The coefficient of thermal conductivity of the tested material is determined by measuring the heat flux density and the temperature difference on both sides of the sample. Two measuring methods - single (1dx) and double (2dx) thickness methods.

Measured in accordance with ASTM C518 and ISO 8301 standards.

Preparatory and auxiliary devices: the preparation of samples for testing consists in giving the samples an appropriate shape and drying / saturation.

Conditions for providing infrastructure

The research infrastructure can be used (as part of scientific cooperation or for a fee), but it is not possible to use the equipment on their own. Measurements will be performed at the installation place by a person authorized by the laboratory manager.

Type of accreditation / certificate:
Not applicable
Access type
Research capabilities

Measured and determined parameters:

  • thermal conductivity coefficient (measuring range: 0.1 to 10 W/mK)
  • specific thermal resistivity
  • thermal resistance
  • surface heat flux density
Last update date
May 27, 2023, 3:20 p.m.
Year of commissioning
Measurement capabilities
  • Measurements of thermal conductivity coefficient (from 0.1 to 10 W/mK) and specific thermal resistivity
  • Measurement of thermal resistance (from 0.003 to 0.05 m2K/W)
  • Determination of the surface heat flux density
  • Temperature range: from -10°C to 190°C (measurements for different temperatures and with different temperature gradients)
FOX 50 Thermal Flux Meter
FOX 50 Thermal Flux Meter