The NG-HDT uses test stations built from Invar steel, a low-expansion alloy that keeps dimensional stability even when exposed to high heat. This material choice minimizes thermal deformation, so measurements remain consistent up to 300 °C. Stable load fixtures hold specimens firmly, preventing shifts that could affect deflection readings. Critical components such as displacement sensors and temperature probes are selected for high-temperature tolerance, allowing the system to deliver precise results over repeated heating cycles.

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