Thermal Conductivity Tester(Transient Fast Hot-Wire Method)，ASTM D5334 high-precision transient hot-wire thermal analyzer
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Transient Fast Hot-Wire Thermal Conductivity Tester is a compact and efficient instrument designed for rapid measurement of thermal conductivity using the transient hot-wire method. The system employs a linear heat source probe with a very high length-to-diameter ratio, enabling accurate simulation of an ideal infinite line and infinitely thin heat source.
With a plug-and-play probe interface and intuitive software operation, the tester allows users to complete the entire process—from sample preparation to final results—within 1 to 2 minutes. Featuring fast measurement speed, wide application range, reliable accuracy, and excellent portability, this instrument is well suited for production inspection, quality control, and research applications across multiple industries.
Application
The Transient Fast Hot-Wire Thermal Conductivity Tester is widely used in:
Material research laboratories for rapid thermal property evaluation
Quality control departments for routine inspection
Geotechnical and civil engineering testing
Polymer and rubber material research
Refractory and insulation material testing
Typical tested materials include:
Plastics and polymer materials
Soil and soft rock
Rubber and elastomers
Liquids and colloids
Pastes, powders, and granular materials
Standards
ASTM D5334-2008 – Standard Test Method for Determination of Thermal Conductivity of Soil and Soft Rock by Thermal Needle Probe Procedure
GB/T 10297-2015 – Determination of Thermal Conductivity of Non-metallic Solid Materials — Hot-Wire Method
GB/T 11205-2009 – Rubber — Determination of Thermal Conductivity — Hot-Wire Method
ASTM C1113-2009 – Standard Test Method for Thermal Conductivity of Refractories by Hot Wire (Platinum Resistance Thermometer Technique)
ASTM D5930-2009 – Standard Test Method for Thermal Conductivity of Plastics by Means of a Transient Line-Source Technique
Parameters
| Item | Specification |
|---|---|
| Thermal conductivity range | 0.0001–50 W/(m·K) |
| Resolution | 0.00001 W/(m·K) |
| Relative measurement error | ≤ 3% |
| Repeatability error | ≤ 3% |
| Temperature resolution | 0.01°C |
| Measurement time | 2–180 s (adjustable) |
| Sample test temperature range | -40 to 130°C (standard: room temperature) |
| Sample types | Solid, liquid, paste, powder, granular |
| Sample shape | Block, sheet, paste, powder, particle, colloid, liquid (no shape restriction) |
| Sample size | Cylinder Ø30 mm, 30 × 30 mm square, or irregular shape; thickness > 1 mm |
| Power supply | AC 220V ±10%, 50/60 Hz |
| Total power | < 200 W |
| Instrument dimensions | 380 × 400 × 165 mm |
| Instrument weight | 5 kg |
Features
Transient hot-wire method with linear heat source probe for fast and reliable measurement
High length-to-diameter probe design to simulate ideal infinite heat source conditions
Fast testing speed, typically 1–2 minutes from setup to result
Wide application range, suitable for solids, liquids, powders, and pastes
Minimal sample preparation, requiring only a relatively flat surface
Compact and lightweight design, easy to carry and deploy on-site
Simple software interface, enabling quick learning and stable operation
Accessories
Transient hot-wire probe with quick-connect interface
Data acquisition and analysis software
Power supply and connection cables
Standard probe accessories and fixtures
Test Procedures
Select an appropriate hot-wire probe according to the sample type.
Place the probe into or onto the sample surface, ensuring good contact.
Connect the probe using the plug-and-play quick interface.
Set test parameters in the software, including measurement time.
Start the test; the system applies transient heating and records temperature response.
The software automatically calculates and displays the thermal conductivity result.
Maintenance Information
Keep the hot-wire probe clean and free from mechanical damage.
Avoid bending or excessive force on the probe during installation and removal.
Periodically check electrical connections and software operation.
Store the instrument in a dry environment with stable temperature.
Perform routine verification using reference materials when required.
Conclusion
The Transient Fast Hot-Wire Thermal Conductivity Tester combines fast measurement speed, wide material compatibility, and reliable accuracy in a compact and portable design. By utilizing the transient hot-wire method and a high-performance linear heat source probe, the instrument minimizes test time while maintaining stable and repeatable results. It is an efficient solution for laboratories, quality control departments, and field applications requiring rapid thermal conductivity evaluation.
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