Thermal Conductivity Tester(Transient Fast Hot-Wire Method)，ASTM D5334 high-precision transient hot-wire thermal analyzer

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Web: standard-groups.com

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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