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TLS-100Measures thermal conductivity and thermal resistivity. Transient line source. Portable thermal conductivity meter for testing soil, rock, concrete, and polymers.
ASTM D5334 • ASTM D5930 • IEEE 442-1981 |
The TLS-100 is a portable thermal conductivity meter used to measure thermal conductivity and thermal resistivity. Perfect for testing the thermal properties of soil, polymers, and other soft materials; as well as testing the thermal conductivity of concrete, rock, stone, or other hard materials. Tests can be performed with the push of a button. The collected data is automatically analyzed and results are displayed immediately.
The Transient Line Source (TLS) follows ASTM D5334. The sensor needle consists of a thin heating wire and temperature sensor sealed in a 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 a plot of temperature rise versus the 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 higher the slope.
The Transient Line Source (TLS) follows ASTM D5334. The sensor needle consists of a thin heating wire and temperature sensor sealed in a 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 a plot of temperature rise versus the 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 higher the slope.
- Soil thermal conductivity testing concrete, polymers, soil and soft rock.
- Follows international standards: ASTM D5334, ASTM D5930, & IEEE 442-1981
- Portable, Economical, and Accurate
- Easy to use
- Standard 100 mm sensor for soft materials
- Optional 50 mm sensor for hard materials
- Soil Thermal Conductivity Meter
Materials |
0.03 to 40 W/m/K. |
Measurement Capabilities |
0.1 to 20 mm²/s. |
Thermal Conductivity |
Up to 5 MJ/m³K. |
Thermal Resistivity |
2.5 to 160 seconds. |
Measurement Time |
Typically better than 3 %. |
Reproducibility |
Better than 5 % (thermal conductivity). |
Accuracy |
10 °C to 40 °C. |
Temperature Range |
Adjusted to the line voltage in the country of use. |
Smallest Sample (100 mm) |
10 mm × 40 mm diameter or square. |
Smallest Sample (50 mm) |
Kapton sensor 8563 (9.9 mm radius) |
Largest Sample Size |
Unlimited |
Standards |
ASTM D5334, ASTM D5930, & IEEE 442-1981 |