Thermocouple Basics
Thermocouple Function
A thermocouple is two wires of dissimilar alloy that are joined into a ball at one end, and open at the other end. Typically the open end is fitted with a plug and the ball end is welded to the thermode near the tip. As thermode temperature increases, so does the voltage across the two wires. This changing voltage feeds back a temperature reading, telling the power supply the temperature of the thermode face. This is what allows the power supply to accurately control the thermode temperature.
Thermocouple Types
Type E: Chromel-Constantan
Type J: Iron-Constantan
Type K: Chromel-Alumel