, a thermocouple to distinguish the different classes

We often use the thermocouple mainly can be divided into: non-standard thermocouple or are two standard thermocouples. One of the standard thermocouple mainly refers to meet the relevant standards, but the relationship between thermoelectric potential and temperature, and allowed error range has certain requirements, but also supporting the use of display instrument can choose; Rather than a standard thermocouple on the scope of use, or the number of level can and standard thermocouple, although there are unified indexing table, but is only suitable for use on special occasions. Thermocouple in the structure and form, mainly in order to ensure the stable and reliable work, so the structure of the relevant requirements on what? A, the thermocouple in the composition of the two play a crucial role in hot electrode, on the degree of welding must be strong enough; Second, should guarantee the two heat insulation between electrodes, to prevent the phenomenon of short circuit; Three, and compensation conductor and thermocouple on the free end connection, should not only reliable also is very convenient; Four, protect casing should ensure that the hot electrode, and harmful medium between sufficient isolation.