Thermocouples are sensors for measuring temperatures, consisting of two wires of different metals, which are joined at one end to form a thermocouple. The junction forms the measuring point. If it heats up, a low voltage in the range of a few 10 µV per 1 °C temperature difference can be measured. The measured voltage is approximately proportional to the temperature of the measuring point. Alongside resistance thermometers, thermocouples are the second major group of sensors used in industrial temperature measurement technology. Thermocouples are primarily used for or at temperatures of up to about 1,700 °C.
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