How to Choose the Material for Different Thermal Resistors
With the continuous development of science and technology in our country and the rapid progress of various industries, the requirements for the tools used are becoming higher and higher. As we all know, thermal resistance is a commonly used temperature detector, which has the characteristics of high measurement accuracy and stable performance. Thermal resistance is mostly made of pure metal materials. At present, platinum is widely used. And copper, now also developed dian, nickel, manganese and rhodium and other materials to make thermal resistance. It is not only widely used in industrial temperature measurement, but also made into a standard benchmark. But there are also different criteria for choosing materials for different thermal resistors. Our company is a manufacturer of thermal resistors. Next, we will explain how to choose the right material for different thermal resistors.
1. First of all, the resistance value of the material used to make the thermal resistance should be approximately linear with the temperature.
2. Secondly, the larger resistivity should be chosen to make the thermal resistance. The larger the resistivity, the smaller the volume of thermal resistance, the smaller the thermal capacity and thermal inertia, and the faster the response to temperature changes.
3. Then choose the manufacturing material of thermal resistance to have better reproducibility in order to ensure that thermal resistance can be applied accurately.
4. There is also the choice of thermal resistance should be within the range of temperature measurement, chemical and physical stability.
5. For making thermal resistance, the temperature coefficient should be as large as possible. Because the temperature coefficient of resistance is defined as the relative variation of resistance at 1 Kelvin temperature rise, the greater the resistance temperature coefficient is, the higher the sensitivity of the thermometer is, the more accurate the measurement results are.
6. But in fact, the material of thermal resistance can be roughly divided into metal thermal resistance and thermal resistance. The metal thermal resistors are mainly platinum and copper. The common types of thermal resistance in industry are Cu100, Pt100, Pt10, Cu50, etc.