Thermocouple thermometer

• Thermocouple thermometers are electrical thermometers which make use of the voltage that develops when two different metals are in contact.
• The voltage of a thermocouple varies with temperature.
• An iron wire and two copper wires may be used to make a thermocouple thermometer.
• One of the junctions in a thermocouple thermometer is maintained at 0 °C and the other junction is used as the temperature probe.
• The voltmeter in a thermocouple thermometer can be calibrated directly in °C.
• Thermocouple thermometers are used to measure rapidly changing temperatures.
• Thermocouple thermometers can also be used to measure much higher temperatures than liquid-in-glass thermometers.
• The voltage of a thermocouple can be measured and recorded automatically.