Expanded Polystyrene — Thermal Conductivity

One of the most popular materials for the thermal insulation of buildings is expanded polystyrene. The example shows a quality control run on a commercially available expanded polystyrene material (EPS 040). Ten samples of the same batch were tested at 24°C and, according to DIN EN 13163, at 10°C. It can clearly be seen that the deviation between the different samples is less than 1%. The determined thermal conductivity λ 90/90 value according to DIN 13163 was 0.03808 W/(m*K). (measurement with HFM 436 Lambda)

HFM 436 Lambda - Heat flow meter

With the Heat Flow Meter, HFM 436 Lambda, the thermal conductivity of large-sized, plate-formed insulators is investigated at a fixed or adjustable temperature gradient. The built-in computer – or an externally connected one – delivers the precise measurement data after a short compensation time.