The thermocouple is widely used temperature sensor in industry. Whenever two different types of metals are connected together, a thermoelectric potential (sometimes called thermoelectric EMF) is generated across the two free ends the metals according to the temperature of the joint. This is known as the thermoelectric effect. Such thermoelectric potentials are only a few milli-volts in magnitude and so the effect is only significant when typical voltage output signals of a measurement system are of a similar low magnitude. dpstar is the best manufacturer and supplier in Malaysia. Visit us at dpstar.