ABSTRACT
Because of the temperature difference between the junction end and reference end, a voltage difference can be measured between the two wires or thermoelements at the reference end. The mini voltage is then converted through hardware and software compensation into temperature readings. In principle, any junction of dissimilar metals could produce an electric potential related to temperature and different alloys could be used for different temperature ranges. The precision and accuracy of measurements of a thermocouple can be improved via some electronic instruments. Thermocouples are widely accepted to monitor temperatures during processing and have been playing a major role in the temperature-sensing eld (Desmarais and Breueræis, 2001).
