Guarded Hot Plate Thermal Conductivity Tester for Insulation Materials
Published: 9/25/2023
Guarded hot plate system for measuring thermal conductivity of insulation and other low-conductivity solid materials using GB/T 10294, ASTM C518, and ISO 8302 methods. Designed for labs and quality departments testing boards, foams, fibers, composites, and powders with automated control and data acquisition.
Product Description
The DRX-II-300A is a guarded hot plate thermal conductivity tester engineered for building insulation and other low-conductivity solids including fiberboard, loose glass or ceramic fibers, polymer foams (XPS/EPS/PUR), laminated composites, vacuum insulation panels, rubber and cement products, powders, fillers, and gypsum boards. It implements the guarded hot plate method and supports compliance with GB/T 10294-2008, ASTM C518, and ISO 8302.
The instrument features a dual-plate architecture with integrated thermal guarding, high-precision temperature sensing and compensation, and fuzzy PID tracking between guard and hot plates for stable, accurate control. Automated parallel adjustment minimizes non-parallel sample errors, while selectable cooling options and precise control electronics deliver stable plate temperatures. A PC interface with real-time control, analysis, and data storage streamlines routine testing in research institutes, university labs, and industrial QC.
Technical Specifications
| Parameter | Specification |
|---|---|
| Measurement Method | Guarded hot plate (complies with GB/T 10294-2008, ASTM C518, ISO 8302) |
| Thermal Conductivity Range | 0.01–2.2 W/m·K |
| Repeatability | ±1.0% |
| Measurement Accuracy | ±2.5% |
| Hot Plate Setpoint | Ambient to 110 ℃ |
| Cold Plate Setpoint | −20 to 60 ℃ |
| Minimum Cold Plate Temperature | −20 ℃ |
| Temperature Control Accuracy | ±0.1 ℃ (hot plate), ±0.1 ℃ (cold plate) |
| Temperature Measurement Accuracy | 0.1 ℃ |
| Temperature Resolution | 0.01 ℃ |
| Cooling Options | Thermoelectric (Peltier) with compressed air cooling; water cooling; ethanol medium with compressor refrigeration (configurable) |
| Sample Size (Mm) | 200 × 200 × (5–20); 300 × 300 × (5–50) |
| Standard Sample Thickness (Conventional) | 25 ± 1 mm (up to 50 mm) |
| Thick-Sample Capability | 60–100 mm; maximum up to 200 mm |
| Sample Flatness Requirement | < 0.5 mm |
| Sample Types | Hard and soft materials; powder testing box optional |
| Thickness Measurement | Optional online real-time thickness measurement and reading |
| Pressure Control | Optional online real-time detection, display, and control of sample pressure |
| Control Technology | Fuzzy PID guard-plate to hot-plate tracking; high-precision temperature compensation; self-calibration for conductivity and heating power; thickness and mean temperature compensation |
| Orientation | Horizontal or vertical configurations (appearance subject to as-shipped unit) |
| Environment | 18–25 ℃; 20–80% RH |
| Power Supply | AC 220 V ±5% |
| Power Consumption | 3.0 kW |
| Software | Automated thermal analysis software, data analysis and report output; Windows 10/7 (Chinese/English UI) |
| Interfaces | Computer interface with real-time measurement and control; data processing and storage |
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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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