The advanced Guarded Heat Flow Meter (GHFM-01) is a primary measurement of thermal resistance and thermal conductivity for solids, such as metals, polymers, composites, and paste. Specifically, the calculation of thermal conductivity from the measurement of thermal resistance is the most accurate method of testing the true thermal conductivity of heterogeneous materials. The steady-state measurement of thermal resistance represents the full sample thickness and mature heat transfer properties.
The GHFM-01 follows ASTM E1530-19 for testing the thermal resistance and thermal conductivity of solids from 20°C to 300°C. The Thermtest proprietary test stack replaces the traditional pneumatic movement with advanced motor control, which allows automated control of testing sample thickness, force, or pressure applied.
|Materials||Metals, Polymers, Composites, and Pastes|
|Type of Sensors||Thermocouples (x6)|
|Thermal Conductivity Range||0.1 to 40 W/m·K|
|Measurement Time||40 to 60 min|
|Repeatability||± 1 to 2%|
|Plate Temperature Range*||-20 to 310 °C|
|Pressure||Automated up to 379 kPa (55 psi)|
|Sample Diameter||50 to 50.8 mm|
|Sample Thickness||Up to 25mm | Thin-films down to 0.01mm with optional software|
*chilled circulator included with each system
The experimental result showed a decreasing trend in the thermal conductivity of stainless steel with increasing temperature.