FOX 600 GHP - Thermal Conductivity Measurements at High Temperatures

The FOX 600 GHP from TA Instruments is particularly well-matched for thermal conductivity measurements at high temperatures, demonstrating unparalleled dimensional and temperature stability. Each of its components includes sophisticated technology representative of the best available today in electronics and advanced materials.

In a Guarded Hot Plate system, a temperature difference (ΔT) is defined across a sample of known thickness (L). The thermal conductivity is calculated from the temperature difference across the identified thickness and the steady state power (W) per area (A) needed to maintain the temperature difference. The Guarded Hot Plate uses a direct measurement of the electrical power supplied to the hot plate instead of heat flow meter signals from a Heat Flux Transducer.

Using an advanced single-sample test technique, the GHP 600 allows for rapid cycle time yet ensures accuracy, is easy to use and provides stable, even temperature control. By the employment of autonomously controlled heaters and matched thermocouples, it ensures a homogeneity of ±0.02 °C across the whole sample. Signals are assessed every 0.7 seconds to quickly bring the system to the designated temperatures and achieve/maintain equilibrium.

Like the rest of the FOX Family, the GHP 600 features stepper motors and optical encoders for autonomous position control and measurement at all four plate corners. Considerably easing sample preparation process as so the system can level the plates to adapt to samples with non-parallel surfaces, enhancing thermal contact and offering a truly representative measurement of sample thickness to within 0.025 mm.

From the advanced Heat Sinks to the innovative design of the Hot Plate, including its unique Guards, the GHP 600 is undeniably the most cutting-edge GHP available today.

Specifications

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International Standards ASTM C177-10, ISO 8302: 1991, EN 12667
Temperature Range 0 °C – 75 °C (32 °F – 167 °F)
25 °C – 250 °C (75 °F – 482 °F)
Thermal Conductivity Range 0.0015 W/m•K to 0.35 W/m•K
Conductance Up to 12 W/m2•°C
Test Configuration Single-sample
Thickness Resolution 0.025 mm
Sample Width 610 mm (24’’) square
Sample Thickness up to 76 mm (3’’)
Temperature Stability ±0.02 °C
Accuracy Better than 1%
Reproducibility ±0.5%

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