Low-Density / Highly-Insulating (Add‑on)

Testing the lightest and most insulating samples like aerogels

The Low-Density/Highly-Insulating Measurement Module is essential to improving accuracy when analyzing low thermally conducting materials such as aerogels and related porous materials. These materials display such low thermal conductivity that heat loss through the sensor medium—in this case, leads and cabling—becomes significant during a transient temperature reading.

Advanced routines are employed using the Low-Density / Highly-Insulating Measurement Module to accurately correct these heat losses when testing using Hot Disk® sensors. This makes it possible to measure materials having extremely low thermal conductivities, such as aerogels, mineral wool, and low-density foam. Only double-sided sample testing is supported, thus requiring two identical low-density/highly insulating sample pieces.

We developed these advanced correcting routines for testing very low thermal conducting materials, and the theory behind them is presented in our paper published in Thermal Conductivity in 2005¹. They are included in ISO standard 22007-2. Hot Disk AB contributed to the development of this standard.

1. M. K. Gustavsson et al., ”On power variation in self-heated thermal sensors”, Thermal Conductivity 27, pp. 338-346 (2005).↩︎

 

Thermal Conductivity Range:

Instruments	Range
TPS 3500, TPS 2500 S, TPS 2200, TPS 1500, TPS 1000	0.01 to 0.5 W/m/K