Heat Flow Method for Thermal Conductivity Measurement
Whats/App: +86 156 1874 6768
Web: standard-groups.com
Standards
The instrument complies with and references the following international and national standards:
ASTM D5470-2017
Standard Test Method for Thermal Transmission Properties of Thin Thermally Conductive Solid Electrical Insulation Materials
MIL-I-49456A
Insulation Sheet Materials, Thermally Conductive, Resin-Based and Glass Fiber Reinforced
GB/T 5598-2015
Method for Determination of Thermal Conductivity of Beryllium Oxide Ceramics
GB/T 29313-2017
Test Method for Thermal Conductive Properties of Electrical Insulating Materials
Parameters
| Item | Specification |
|---|---|
| Thermal conductivity range | 0.01–50 W/m·K; 5–500 W/m·K (high-conductivity mode, automatic software switching) |
| Thermal resistance range | 0.05–500 cm²·K/W |
| Sample size (standard) | Φ30 mm or 20 × 20 mm |
| Optional sample sizes | Φ15 mm, Φ50 mm, 25.4 × 25.4 mm (customized by contract) |
| Sample thickness range | 0.001–50 mm (typical: 0.02–20 mm) |
| Hot plate temperature range | Room temperature to 99.99 °C (standard) |
| Optional hot plate range | Room temperature to 299.9 °C / 500 °C |
| Cold plate temperature range | 0–99.99 °C |
| Cold plate control accuracy | 0.01 °C |
| Pressure range | 0–1000 N |
| Pressure control | Servo motor control, accuracy 0.1 N |
| Thickness measurement range | 0–50.00 mm |
| Thickness resolution | 0.001 mm, automatic measurement |
| Number of samples | 1 piece (thin films or stacked layers supported) |
| Measurement error | ≤3% (thermal conductivity & resistance) |
| Contact thermal resistance error | ≤5% |
| Power supply | AC 220 V / 50 Hz |
| Power consumption | 1000 W |
Features
Designed and manufactured fully in accordance with ASTM D5470-2017
Automated servo motor pressure control with precise force setting and holding
Automatic thickness measurement with high resolution
Six-point temperature gradient detection for improved measurement accuracy
Thermal protection structure around the test rod to reduce environmental influence
Capable of measuring thermal resistance curves under different pressures and temperatures
Optimized mathematical models for thermal conductivity and contact thermal resistance
Automatic cold-end temperature compensation without ice-water compensation
Fully computer-controlled operation with data acquisition, analysis, and reporting
Available in standard floor-standing and compact benchtop configurations
Accessories
Main testing unit
Thermal analysis software (Chinese and English versions)
Precision low-temperature constant-temperature water bath (0.01 °C accuracy)
Computer (user-selectable)
Calibration reference samples (2 pieces)
Sample fixtures and accessories (solid sample molds, powder, paste, and grease sample cells)
Test Procedures
Select the appropriate test mode according to material type and test objective.
Place the solid sample between the hot and cold plates; stack thin samples if required.
Set pressure, temperature, and test parameters via the control software.
Apply pressure automatically using the servo motor system.
Measure sample thickness automatically and initiate the test.
Record temperature gradients and heat flow data during steady-state measurement.
Calculate thermal conductivity, thermal resistance, and contact thermal resistance.
Output test curves and reports through the software.
Maintenance Information
Keep hot and cold plates clean and free from surface damage
Regularly inspect pressure and thickness measurement systems
Verify system accuracy using reference samples when required
Maintain stable water bath operation for cold-end temperature control
Store accessories and sample fixtures properly when not in use
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