Thermal Conductivity Laboratory Instrument Portable Meter Anisotropic Testing Module


Directional measurement of anisotropic materials

The Anisotropic Module allows you to measure directional thermal transport properties of anisotropic materials such as layered materials, fiber-reinforced plastics, etc. 

When using the TPS system to evaluate materials with direction dependent thermal properties, the following assumptions are made: 

– The main directions in the material to be investigated are orthogonal and can be described in terms of a-, b- and c-axes. 

– We must further assume the properties along the b- and c-axes (planar direction) are the same and the properties along the a- axis (normal direction) are different, as the experimental technique is only valid for situations that satisfy this condition. 

When making measurements on isotropic materials the TPS sensor is placed between the plane surface of the two sample halves of the material under investigation (see Figure 1).

Anisotropic Testing Module

Figure 1. TPS sensor placement for standard test measurement on isotropic materials.

A similar arrangement applies for anisotropic materials, except that it is particularly important to orient the sample halves and the TPS sensor correctly according to the main directions in the material (see Figure 2). That is the plane of the sensor containing the heat source (double spiral) would be placed so that it would be perpendicular to the normal direction (a-axis) and parallel with the planar direction (the plane formed by the b- and c-axes). 

Anisotropic Testing Module

Figure 2. Placement of the TPS sensor in relation to the main directions of orientation in an anisotropic sample.

Only one measuring position of the sensor is possible and for that reason it is necessary to know the specific heat per unit volume of the material in order to resolve the directional thermal transport properties of the material in the two planes. 


TPS 3500

Thermal Range: 0.005 to 1800 W/mK
Temperature: -160°C to 1000°C

TPS 2500 S

Thermal Range: 0.005 to 1000+ W/mK
Temperature: -160°C to 1000°C

TPS 2200

Thermal Range: 0.005 to 500 W/mK
Temperature: -160°C to 750°C

TPS 1500

Thermal Range: 0.005 to 20+ W/mK
Temperature: -160°C to 1000°C
Thermal Conductivity Testing Anisotropic
Thermal Conductivity Testing Anisotropic