Thermal Conductivity Analyzer (Hot Wire Method) Hot-Wire Thermal
Property Tester
1.Description:
The LRX-3 thermal conductivity tester employs the transient hot
wire method, including the cross-line method and the parallel-line
method. It mainly measures the thermal conductivity, thermal
diffusivity (heat diffusion coefficient), and specific heat
capacity of solid and powdered materials at different temperatures.
It features high precision, high resolution, and high
reproducibility. It is controlled by a computer for automatic
measurement. It is widely used in research institutions, quality
inspection departments, factories, and mines for the measurement of
material thermal conductivity.
This instrument is a new development based on the original LRX-2
model of our factory. It has improved measurement accuracy and
reproducibility, and has a more reasonable structure and is easier
to use. Model classification: LRX-3A mainly uses the cross hot wire
method (the parallel line method can also be used to measure
materials below 5w/mk); LRX-3B uses the parallel line method and
can measure materials smaller than 25w/mk.
2.Standard
Reference standards for the instrument: GB/T 5990-2021 "Test
Methods for Thermal Conductivity, Specific Heat Capacity and
Thermal Diffusivity of Refractory Materials (Hot Wire Method)";
GB/T 17106-1997 "Test Method for Thermal Conductivity of Refractory
Materials (Parallel Line Method)"; GB/T 11205-2009 "Determination
of Thermal Conductivity of Rubber (Transient Hot Wire Method)";
GB/T 10297-2015 "Determination of Thermal Conductivity of
Non-metallic Solid Materials (Hot Wire Method)" etc.
3.Configuration:
Including one LRX-3 test host, one software, one set of
communication interface and data cable, one desktop computer, and
one constant temperature test hotline. The constant temperature
device and high-temperature line are optional items and will be
configured according to the contract.
4.Technical Parameter
Parameter | Specification |
Measurement Range | |
DRX-3A (Cross-Wire Method) | 0.015 ~ 2.0 W/(m·K) |
DRX-3A (Parallel-Wire Method) | 0.015 ~ 5.0 W/(m·K) |
DRX-3B (Parallel-Wire Method) | 0.015 ~ 25.0 W/(m·K) |
Temperature Range | Room temperature (standard). Optional systems available: |
-40 to 120 °C | Requires high/low temp chamber (Cu-Constantan wire) |
RT to 1000 °C | Requires resistance furnace (NiCr-NiSi or Pt-PtRh wire) |
RT to 1300 °C | Requires SiC rod furnace (Pt-PtRh wire) |
RT to 1600 °C | Requires MoSi₂ rod furnace (Pt-PtRh wire) |
Accuracy | < ±5.0 % |
Sample Size | Two symmetrical blocks: ≥40mm×80mm×114mm (rectangular) OR two semi-cylinders forming ≥Ø80mm×114mm cylinder. Standard brick sizes (e.g., 230x110x65/75mm) recommended. Custom sizes possible. |
Temperature Resolution | 0.001 °C |
Hot Wire Power Resolution | |
DRX-3A Current | 0.01 mA |
DRX-3A Voltage | 0.1 mV |
DRX-3B Current | 0.1 mA |
DRX-3B Voltage | 0.1 mV |
Power Supply | 220 V, 50 Hz, 500 W (Furnace controller requirements specified
separately). |