Description of the main operating principles, application areas and characteristics of thermal conductivity instruments
Time:
Aug 28,2023
Thermal conductivity meter: local heating is carried out with a linear electrical conductor embedded in the sample along the length of the sample. The hot wire carries a current of known constant power, that is, the power is constant in time and in the length of the sample. The thermal conductivity can be calculated from the power of the hot wire and the temperature at two time intervals after the current is turned on. The function of temperature rise and time is the thermal conductivity of the tested sample.
Thermal conductivity meter: The linear electrical conductor embedded in the sample along the length of the sample is used for local heating. The hot wire carries a current with a known constant power, that is, the power is constant in time and in the length of the sample. The thermal conductivity can be calculated from the power of the hot wire and the temperature at two time intervals after the current is turned on. The function of temperature rise and time is the thermal conductivity of the tested sample.
The working principle of the thermal conductivity meter: Using a simple and accurate heating and monitoring system, the temperature rise rate of the sample is calculated. The slope and intercept of the time curve, and then calculate and display the thermal conductivity based on this data.
The thermal conductivity meter is mainly used to determine the thermal characteristic parameters of various material samples on site. The KD2 is lightweight and rugged, suitable for shuttle measurements on multiple samples. Due to the small needle shape, the sample will not be compressed when inserting the sample; the heating time is short, avoiding the drying of the surrounding material due to the heating of the probe.
The main application areas of the thermal conductivity meter: research on soil heat flux in energy balance; research on heat dissipation of buried cables; geothermal design; research on soil heat flow of fire land; research on thermal characteristics of moisture and density of related substances; influence factors of seed germination, etc.
Thermal conductivity meterThe main functional characteristics of the performance are as follows:
1. Can measure film or paper samples
2. Automatically determine the appropriate heating current value of the sample.
3. Quickly and easily measure the thermal conductivity of various types of samples.
4. LCD screen, measurement can be directly observed heating curve.
5. Depending on the type of sample and measurement temperature, an appropriate sensor can be selected.
6. The heating curve is displayed by time logarithm, which can confirm the linearity of the measured value.
7. Automatic determination of sample temperature stability, automatic measurement.
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