A thermocouple is a device that acts as a temperature to voltage transducer. It is composed of two different wires. One end of the wires is welded together. This end is referred as junction end. The other end of the thermocouple (end of two wires that is not joined) is referred as reference end. When the junction end experience changes in temperature, an electromotive force (EMF) occurs at the reference end of the thermocouple. Read more