Bi2Te3 metal, widely used among thermoelectric materials, which is the core material of thermoelectric devices, is highly oxidizable in the air. Especially for metals produced by the existing Zone Melting Process. The strength of the inner metal is very weak. When cutting thermoelectric metal produced from bar-shaped ingots according to its own purpose, mechanical shock to the internal metal may cause defects during use. There are various systems for verifying the durability of a thermoelectric element, but it is a common method to verify durability while applying electric shock and thermal shock to the thermoelectric element through a cycling test.

For cold and hot thermoelectric elements, a temperature sensor is placed on a cooling device equipped with a thermoelectric element to measure durability. By changing the temperature of the thermoelectric element from 0℃ to 90℃ to 0℃ as one cycle, you can continuously conduct the cycling test as many times as your company's standard number of times.