When users choose a thermal conductivity meter, they often overlook the key technologies at the core of the meter. Only thermal conductivity meters that have solved these key technologies can be considered qualified products and truly meet national and international standards. Unfortunately, only a very small number of domestic manufacturers have effectively addressed these key technologies.
1. For the same type of tested material, changing the thickness of the specimen, such as from 20mm to 30mm, and keeping other measurement conditions unchanged, the measured thermal conductivity is consistent because the thermal conductivity of the same material is not related to thickness, just like the density and volume of water are independent; Our company has successfully developed a thickness compensation algorithm, which scientifically solves the problem of the influence of thickness on thermal conductivity.
2. For the same tested material, at the same average temperature (the average temperature of the cold plate and hot plate), such as 25 ℃, changing the temperature difference between the cold and hot plates, such as changing from 10 ℃ for the cold plate and 40 ℃ for the hot plate to 20 ℃ for the cold plate and 30 ℃ for the hot plate, or 15 ℃ for the cold plate and 35 ℃ for the hot plate, the measured thermal conductivity is consistent. Our company has successfully developed a temperature difference compensation algorithm, which scientifically solves the problem of the impact of temperature difference on thermal conductivity.
3. The heat exchange between the hot plate and the protective plate is almost zero. The thermal conductivity meter of the protective plate method is designed based on Fourier's one-dimensional thermal conductivity law, which requires zero heat exchange between the hot plate and the protective plate. If there is heat exchange between the hot plate/protective plate, the instrument will no longer follow Fourier's one-dimensional heat conduction law and will result in significant measurement errors in thermal conductivity. Our company has successfully developed a thermal balance algorithm for hot plates/protective plates, which effectively solves the heat exchange problem between hot plates/protective plates, ensuring that the heat exchange between hot plates/protective plates is close to zero and ensuring the accuracy of thermal conductivity measurement.
With the continuous improvement of national requirements for energy conservation and emission reduction, the quality requirements for thermal conductivity measuring instruments are becoming increasingly strict. Our company would like to remind potential users of thermal conductivity meters that the market for thermal conductivity meters is mixed, and it is difficult to judge the quality of the instrument solely based on website information or text information. It can be said that thermal conductivity meters that do not meet national standards and technical indicators mentioned in the text are very common in the market. In other words, many thermal conductivity meters contain a large amount of "lean meat powder". We remind everyone to carefully choose thermal conductivity meter suppliers, carefully implement the key technologies and acceptance methods of thermal conductivity meters, eliminate counterfeits and retain authenticity, and avoid buying inferior products containing "lean meat powder".
To help everyone purchase high-quality thermal conductivity meters, please refer to the following procedure to choose a thermal conductivity meter supplier:
1. Firstly, understand the key technology of thermal conductivity (refer to the "Selection Guide" on this website), and clarify which indicators the thermal conductivity meter must achieve;
2. Understand how the thermal conductivity meter is inspected, that is, what procedures need to be followed to inspect the thermal conductivity meter (refer to the "Selection Guide" on this website)
3. Communicate with suppliers to see if the key technologies mentioned above have been resolved and if the acceptance criteria mentioned above are met;
4. Suggest that customers bring samples to the supplier's site for testing and conduct an inspection of the supplier;
5. If you do not have the conditions to visit the supplier's site, it is recommended that the customer send various samples to different suppliers for testing and issue test reports. In this way, you can judge the product quality of different suppliers based on the test results, and thus determine your supplier;
6. If you are unable to conduct on-site inspections and testing at the company, nor can you send samples to different suppliers for testing and comparison, please request the user list and contact information of the thermal conductivity meter from different suppliers. This way, you can directly understand the quality of the supplier's products through their users.
Please remember the above purchasing procedure to avoid purchasing thermal conductivity products containing a large amount of "lean meat powder"!