The quality of any product is placed first, especially for electrical products such as thermocouples. If the quality is unqualified, it is prone to leakage during use, resulting in damage to the person or surrounding property. . What kind of quality can be verified? You can check whether the product carries the quality inspection report randomly at the time of purchase. The quality inspection certificate can determine whether the product is a qualified product and can be put into normal use. Secondly, you can also use the demonstration site to see if there are some deficiencies, so that you can decide which thermocouple to use after you use it.