The advantages and disadvantages of the thermocouple, rounding

First is the thermocouple, the advantages of: a, solid and durable, because the device thermocouple is durable, and the performance of the shock and vibration is better, so the place that is suitable for use in the environment is bad; Second, the temperature range is wide, thermocouple applicable temperature range is very wide, mainly in the - 200℃- Between 2500 ℃, the main still depend on the use of wire; Three, not self-heating, due to the use of the thermocouple is don't need to motivate other power, so its will not to fever; Four, the response is faster, mainly because of the volume of a thermocouple is small, so the heat quantity of heat is low, then the thermocouple for temperature on the changes of reaction is fast, especially the induction and joint position of nudity. Followed by the disadvantage of thermocouple explanation: one, on a signal conditioning is more complex, talking about the thermocouple voltage into can use temperature readings, is the need for a large number of signal conditioning, signal conditioning is actually need to spend a lot of time, if not handled properly, there will be a serious error, eventually lead to reduce the phenomenon of precision 2, easy to corrode, due to the thermocouple is made up by two different metals, in some cases, will appear because of time and the corrosion phenomena, and its precision is affected, so the need for proper protection, thermocouple and maintenance and maintenance is a must; Three, accuracy is lower, the characteristics of metal is the cause of instability in thermocouple accuracy, for the thermocouple on the measurement accuracy, or in the reference junction temperature accuracy; Four, the noise resistance is relatively poor, if measuring millivolt level on the signal changes, magnetic and electric fields may appear noise.