Rapid Thermal Conductivity Tester for Geotechnical Materials (Transient Plane Heat Source Method)

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Rapid Thermal Conductivity Tester for Geotechnical Materials (Transient Plane Heat Source Method) is a high-precision instrument based on the TPS (Transient Plane Source) technique, utilizing a Hot Disk probe. This tester measures thermal conductivity of geotechnical materials, including soils, rocks, and other solid specimens.

The Hot Disk method offers several advantages:

Direct measurement of heat propagation, saving significant testing time.

Avoids errors caused by contact thermal resistance, unlike steady-state methods.

Minimal sample preparation; solid samples only require a relatively flat surface.

The tester provides rapid, accurate measurements, with broad applicability and the ability to reduce the influence of natural convection during testing. The instrument includes a special circular sample holder for geotechnical specimens.

Reference standard: ISO 22007-2:2008.

Application

This testeris designed for thermal characterization of geotechnical materials, including:

Soils, clays, and sands

Rocks and rock aggregates

Cemented and compacted geotechnical specimens

Building foundation materials and insulation layers

Typical applications include:

Geotechnical research and engineering labs

Civil engineering thermal property evaluation

Environmental and geoscience studies requiring thermal conductivity data

Rapid testing of core samples or cylindrical specimens

Standards

ISO 22007-2:2008 – Determination of Thermal Conductivity and Thermal Diffusivity of Solids by Transient Plane Source (TPS) Technique

Parameters

Item	Specification
Thermal conductivity range	0.001–100 W/(m·K)
Measurement time	1–60 seconds
Accuracy	Better than 3%
Temperature range	Standard: room temperature; optional: -20–120°C (additional cost)
Sample dimensions	Height ≥10 mm; diameter ≥45 mm; relatively flat surface required
Sample type	Solid geotechnical specimens, soil cores, rock slices
Operation	Fully automated via software
Power supply	AC 220V, 50/60 Hz; total power <500 W
Reference standard	ISO 22007-2:2008

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