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Xtester- TLS-100 Transient Line Source hermal conductivity and thermal resistivity
Description
The TLS-100 is a portable meter used to measure thermal conductivity and thermal resistivity of a variety of samples, including soil, rocks, concrete and polymers. Tests are performed with the push of a button and results are displayed instantly. The TLS-100 features sensors that are auto-recognized with corresponding testing parameters automatically loaded. The TLS-100 follows ASTM D5334-22a and IEEE 442-2017. The sensor needle consists of a thin heating wire and temperature sensor sealed in a 150, 100 or 50 mm steel tube. The sensor is completely inserted into the sample to be tested. Heat is delivered to the sample using a constant current source (q) and the temperature rise is recorded over a defined period of time. The slope (a) from plot of temperature rise versus logarithm of time is used in the calculation of thermal conductivity (k). The higher the thermal conductivity of a sample, the lower the slope. For samples of low thermal conductivity, the slope will be higher. |
Specifications
Method | TLS-100 (Included) | TLS-50 | TLS-150 |
Materials | Soils, pastes, powders and solids | Concrete, rocks and polymers | Soils, pastes, powders and solids |
Measurement capabilities | Bulk properties | Bulk properties | Bulk properties |
Thermal conductivity (W/m·K) | 0.1 to 5 | 0.3 to 5 | 0.1 to 3 |
Thermal resistivity (mK/W) | 0.2 to 10 | 0.2 to 3.3 | 0.3 to 10 |
Measurement time | 3 minutes | 3 minutes | 3 minutes |
Smallest sample size | 100 mm in length, 50 mm in diameter | 50 mm in length, 50 mm in diameter | 150 mm in length, 50 mm in diameter |
Largest sample size | Unlimited | Unlimited | Unlimited |
Accuracy | 5% | 5% | 5% |
Reproducibility | 2% | 2% | 2% |
Temperature (°C) | -40 to 100 | -40 to 100 | -40 to 100 |
Standard | ASTM D5334-22a, IEEE 442-1981 | Modified ASTM D5334-14 | ASTM D5334-14, IEEE 442-2017 |
