Properties of metals used as electrodes for Thermocouples

Requirements imposed to the properties of metals used as electrodes for thermocouples are as follows:

• reproducibility of material, ie possibility of obtaining of metal wires with the same properties;

• resistance of metal electrodes should be small and have a weak relationship vs temperature;

• stability of a static characteristic EAB = f(ϑ), ie recovery of properties after measurements;

• high sensitivity;

• correlation EAB = f(ϑ) should be close to linear relationship as much as possible.