For the precise measurement of thermal diffusivity a or conductivity (λ), the flash method has established itself as a rapid, versatile and precise measuring method. NETZSCH offers a total of four models (LFA 467 HyperFlash®, LFA 457 MicroFlash®, LFA 467 HyperFlash® HT and LFA 427), which cover the total a broad spectrum of materials and temperature ranges.
The thermal conductivity (λ) of insulation materials can be determined directly with plate instrumentation (HFM = Heat Flow Meter or GHP = Guarded Hot Plate): Included here are the HFM 446 Lambda with its new, expanded measurement capabilities and the GHP 456 Titan® guarded hot plate, which is an absolute method and thus requires no calibration.
The instruments listed above operate in accordance with relevant instrument and usage norms. Specifically, these include:
- For LFA: ASTM E1461, DIN EN 821-2, ISO 22007-4, ISO 18755
- For HFM: ASTM C518, ISO 8301, DIN EN 12667, JIS A 1412
- For GHP: ISO 8302, ASTM C177, DIN EN 12939, DIN EN 12667, DIN EN 13163