The thermocouple temperature measurement conditions and technical advantages

Thermocouple is a temperature sensing element, can also be understood as an instrument at a time. For example, we can directly to measuring temperature with thermocouple. Or we can be regarded as a form of energy converter, because it can take the heat energy into electricity.

generally in closed loop is to use two kinds of conductor material qualitative, because its material is qualitative different, so the electrons density corresponding electron diffusion, stable equilibrium is produced after electric potential. When the temperature gradient is at both ends, the circuit will generate an electric current, produce thermoelectric emfs, the bigger the temperature difference, the greater the current will be. So we can use the thermocouple thermoelectric emfs have been measured, you can know its value.

in practical applications, the thermocouple technology existing very obvious advantages: first, the element has a large temperature range, stable performance; Second, the measuring accuracy is guaranteed, this is because it can direct contact with the object being measured, not affected by the intermediate medium; Moreover, the thermal response time is fast, and flexible response to temperature changes.

so, not only for temperature measurement in working, from - 40 to + 1600 ℃ range, there can be continuous temperature measuring thermocouple. Its performance is reliable, stable, and has good mechanical strength, long service life, safe and more convenient.

but for temperature measurement in the process, there is a premise condition. A thermocouple is must is to use two kinds of different nature but fit certain requirements of the conductor or semiconductor materials constitute a loop, another condition is the measurement of must have a temperature difference between side and reference.

the above mainly to introduce the technical superiority of the thermocouple and temperature conditions. Believe in with that in mind, everyone's understanding for thermocouple is also more deeply.