Guarded Hot Plate Heat Flow Thermal Conductivity Tester
Published: 1/6/2025
Guarded hot plate tester using dual heat flux sensors to measure thermal conductivity and thermal resistance of insulation and other plate-like materials in accordance with ASTM C518, ISO 8301, and GB/T 10295. Designed for fast stabilization, automated control, and report generation for QC and process monitoring.
Product Description
The DRH300 is a heat flow method guarded hot plate system designed to characterize the thermal conductivity and thermal resistance of insulation and other slab materials such as clays, sands, ceramics, and plastics. Its symmetric configuration places a heat flux transducer on both the hot and cold plates to improve accuracy and response, enabling rapid stabilization and repeatable measurements.
All testing steps—from temperature control through data acquisition, analysis, and report generation—are automated via an upper-computer interface or an optional embedded touch-screen HMI. The system supports rapid measurements for quality control, with the ability to stop once a stable thermal resistance is reached or extend test time as required. Measurement methods strictly conform to ASTM C518, ISO 8301, and GB/T 10295.
Technical Specifications
| Parameter | Specification |
|---|---|
| Measurement Method | Heat flow meter, guarded hot plate, dual heat flux transducers |
| Standards Compliance | ASTM C518; ISO 8301; GB/T 10295 |
| Thermal Conductivity Range | 0.005–2.0 W/(m·K) |
| Thermal Conductivity Accuracy | ±3% (at 25°C ambient) |
| Thermal Conductivity Repeatability | ±1% |
| Thermal Resistance Range | 0.1–8.0 m²·K/W |
| Sample Configuration | Symmetric, one heat flux sensor on each of hot and cold plates |
| Sample Size | 300 × 300 mm |
| Sample Thickness | 10–50 mm |
| Hot Plate Max Temperature | 100°C |
| Cold Plate Control Temperature | −30.0°C ±0.1°C with thermostatic control |
| Temperature Measurement Resolution | 0.01°C |
| Temperature Measurement Accuracy Class | 0.1 class |
| Hot Surface Temperature Control Range | Room temperature to 99.99°C |
| Hot Plate Control | Planar heater with bidirectional thyristor control; automatic intelligent PID |
| Programmable Temperature Setpoints | >10 points |
| Cooling Options | Forced-air cooling; external water bath; thermoelectric (electronic) cooling (user selects one) |
| Automation | Computer-based automatic testing; test temperature range customizable |
| Main Components | Test host; analysis software; low-temperature bath; desktop PC and printer |
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B6-101, Zhongnan High-Tech Intelligent Manufacturing Industrial Park, No. 10 Shuangma Street, Yuetang District, Xiangtan City, Hunan Province, China
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