Hello everyone, I am the person in charge of the manufacturer specializing in the production of instrumentation, Manager Wang. Next, I will introduce to you the main materials of the resistance wire room of the thermal resistance
The main materials of resistance wires in the temperature sensing elements of industrial RTDs are usually constantan, nickel-chromium alloy, platinum-iridium alloy, etc. These materials have high resistivity and stability, and are able to maintain stable resistance values in both high and low temperature environments.
Concopper is a copper-nickel alloy with good oxidation and corrosion resistance, and is suitable for measuring high-temperature gases and liquids. Nichrome alloys have high resistivity and excellent corrosion resistance, and are commonly used to make high-quality thermocouples and RTDs. Platinum-iridium alloy has high resistivity and good corrosion resistance, which is suitable for making high-accuracy RTDs.
In addition to the above materials, resistance wires can also be made of metal materials such as iron, nickel, and copper, but the resistivity and stability of these materials are relatively low, and they are suitable for making general industrial thermal resistance.
When making a resistance wire, it is also necessary to consider its shape and structure. Common resistance wire shapes include spiral, straight, sheet, etc., and different shapes have different thermal response times and sensitivity. In addition, the structure of the resistance wire also needs to take into account its high temperature resistance, oxidation resistance, corrosion resistance, etc., to ensure its stability and service life.
In short, the main material of the resistance wire in the temperature sensing element of industrial RTD needs to be selected according to the use environment, measurement temperature range, accuracy requirements and other factors, and attention should be paid to the design of its shape and structure to ensure the performance and stability of RTD.
The above is my experience explanation, welcome to leave a message to ask.