Benchtop Thermal Conductivity Tester
Benchtop Thermal Conductivity Tester (Heat Flow Method) is a compact, high-precision testing system designed for measuring thermal conductivity, thermal resistance, and interfacial contact thermal resistance of thin thermally conductive and electrically insulating materials. The instrument is fully designed and manufactured in accordance with ASTM D5470-2017. utilizing the steady heat flow method combined with precise temperature gradient measurement. With automated servo-controlled loading, automatic thickness measurement, multi-point temperature detection, and computer-based control, the system enables accurate evaluation of material thermal performance under different pressures and temperatures while saving valuable laboratory space.
Application
The Benchtop Thermal Conductivity Tester is primarily used for thermal performance analysis of thin solid materials and interface materials, including:
Thin thermally conductive solids
Solid electrical insulation materials
Thermal interface materials, such as thermal grease, silicone grease, and resins
Rubber and elastomer materials
Ceramic materials, including beryllium oxide ceramics and alumina ceramics
Metal and composite substrates, such as aluminum substrates and copper-clad laminates
Standard testing is performed on solid sheet samples. With the use of optional frames and sample cells, powdered and paste materials can also be evaluated. The system is widely applied in universities, research institutes, quality inspection laboratories, and manufacturing facilities for material thermal analysis.
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 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 ranges | 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 |
| Number of samples | 1 piece (thin films or stacked layers supported) |
| Measurement error (thermal conductivity & resistance) | ≤3% |
| Measurement error (contact thermal resistance) | ≤5% |
| Test operation | Fully automatic computer-controlled testing |
| Power supply | AC 220 V / 50 Hz |
| Power consumption | 1000 W |
Features
Fully designed and manufactured in accordance with ASTM D5470-2017
Benchtop configuration with the same testing performance as floor-standing models
Servo motor automatic loading with precise pressure control
Automatic thickness measurement for improved accuracy and repeatability
Six-point temperature gradient detection to enhance measurement precision
Thermal protection structure around the test rod to reduce environmental influence
Measurement of thermal conductivity, thermal resistance, and interfacial contact thermal resistance
Capability to generate thermal resistance curves under different pressures and temperatures
Optimized mathematical models for high-conductivity and interface testing
Automatic cold-end temperature compensation without ice-water compensation
Fully automated data acquisition, analysis, and report output
Accessories
Main testing unit
Thermal analysis software (Chinese and English versions)
HX-1008 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 sheet sample between the hot and cold plates.
Install sample frames or test cells when testing powder or paste materials.
Set test parameters, including temperature and pressure, via the software.
Apply pressure automatically using the servo-controlled loading system.
Measure sample thickness automatically before testing.
Record temperature gradients and heat flow data during steady-state conditions.
Calculate thermal conductivity, thermal resistance, and contact thermal resistance.
Save, print, and export test results and reports.
Maintenance Information
Keep hot and cold plate surfaces clean and free from contamination
Inspect pressure loading and thickness measurement systems regularly
Verify system accuracy using calibration reference samples when required
Ensure stable operation of the constant-temperature water bath
Store accessories and fixtures properly when not in use
FAQ
1. What types of materials can be tested with the Benchtop Thermal Conductivity Tester?
The Benchtop system is designed for testing thin thermally conductive and electrically insulating materials. Typical materials include thermal grease, silicone grease, resins, rubber, beryllium oxide ceramics, alumina ceramics, metals, aluminum substrates, copper-clad laminates, and composite materials. Solid sheet samples are tested directly, while powdered and paste materials can be evaluated using optional frames and dedicated sample cells. This flexibility allows the system to cover a wide range of thermal interface and insulation applications.
2. What thermal parameters can be obtained from a single test?
The instrument can measure thermal conductivity, thermal resistance, and interfacial contact thermal resistance. By performing tests under different pressures and temperatures, thermal resistance curves can be generated. With optimized mathematical models and six-point temperature gradient detection, the system provides reliable analysis of both material heat transfer behavior and interface thermal performance, supporting detailed evaluation of thermal management materials.
3. How does the instrument control pressure during testing?
Pressure is applied automatically using a servo motor control system with a range of 0–1000 N and a control accuracy of 0.1 N. The pressure value can be precisely set and maintained throughout the test, ensuring stable contact conditions. This capability is essential for accurate contact thermal resistance measurement and for studying pressure-dependent thermal behavior of materials.
4. Is ice-water compensation required for cold-end temperature control?
No. The Benchtop Thermal Conductivity Tester uses an automatic cold-end temperature compensation system. This design eliminates the need for traditional ice-water compensation, improving operational convenience and maintaining stable temperature control during testing.
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