Lb-DX3A Hot-Wire Method Thermal Conductivity Meter (Cross‑Line and Parallel‑Line Methods)
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Description
Product Introduction:
The Lb-DX3A Hot-Wire Thermal Conductivity Meter employs the transient hot-wire method, including both the cross‑wire and parallel‑wire techniques, to measure the thermal conductivity, thermal diffusivity, and specific heat capacity of solid and powdered materials over a range of temperatures. It features high accuracy, high resolution, and excellent reproducibility, with automated measurements controlled by a computer. This instrument is widely used in research institutions, quality‑control laboratories, and industrial facilities for determining the thermal conductivity of various materials, enhancing measurement precision and repeatability while offering a more rational design and greater ease of use.
Model Classification:
The Lb-DX3A primarily employs the cross‑wire method (the parallel‑wire method may also be used to measure materials with thermal conductivities below 5 W/m·K);
Reference standard:
GB/T 5990 “Refractory Materials — Test Methods for Thermal Conductivity, Specific Heat Capacity, and Thermal Diffusivity (Hot-Wire Method)”；
GB/T 17106 “Test Method for Thermal Conductivity of Refractory Materials (Parallel-Line Method)”;
GB/T 11205 “Determination of Thermal Conductivity of Rubber (Transient Hot-Wire Method)”
GB/T 10297 “Determination of Thermal Conductivity of Non-Metallic Solid Materials (Hot-Wire Method)” and others.
Technical Specifications:
| Parameter Category | Parameter content |
| Measurement range | DRX-3A (Cross-Line Method): 0.015–2.0 W/(m·K) DRX-3A (Parallel-Line Method): 0.015–5.0 W/(m·K) |
| Temperature range | Routine testing: room temperature; Optional accessories available to extend the test temperature range (additional charges apply). -40 to 120 °C (with a high/low temperature constant‑temperature chamber), equipped with a copper–constantan hot wire. Room temperature to 1000 °C (with a resistance‑wire furnace), equipped with nickel‑chromium–nickel‑silicon or platinum–platinum‑rhodium thermocouples. Room temperature to 1300 °C (with a silicon-carbide rod resistance furnace), equipped with a platinum–platinum‑rhodium thermocouple. Room temperature to 1600 °C (with a silicon‑molybdenum rod resistance furnace), equipped with a platinum–platinum‑rhodium thermocouple. |
| Measurement accuracy | <±5.0 % |
| Specimen size | Two rectangular prisms, each measuring no less than 40 mm × 80 mm × 114 mm and symmetrically arranged; or two semicylinders, each with a cross-sectional diameter of ≥80 mm and a length of ≥114 mm, stacked to form a cylinder. Recommended standard brick dimensions: 230 mm × 110 mm × 65 mm or 230 mm × 110 mm × 75 mm (customizable upon customer request). |
| Temperature resolution | 0.001℃ |
| Hotline power supply | Lb-DX3A: Current resolution 0.01 mA, voltage resolution 0.1 mV |
| Equipment power supply | Voltage: 220 V; Frequency: 50 Hz; Power: 500 W (For power supply requirements of the electric furnace temperature controller, refer to the controller’s instruction manual.) |
Instrument Configuration
1. One testing host unit of the Lb-DX3A hot‑wire method thermal conductivity meter,
2. One copy of the software,
3. One set of communication interface and data cable,
4. One desktop computer,
5. One set of room-temperature test leads.
In addition, the constant-temperature unit and high-temperature heating cable are optional features and will be configured in accordance with the contract.
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Lb-DX3A Hot-Wire Method Thermal Conductivity Meter (Cross‑Line and Parallel‑Line Methods)
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