A thermocouple is a sensor for measuring temperature. It consists of two dissimilar metals, joined together at one end, which produce a small unique voltage at a given temperature. This voltage is measured and interpreted by a thermocouple thermometer. Life of thermocouple will be constrained by an ambient environment and also by ageing. As a result, wires in thermocouple measure reduced voltages as the thermoelectric coefficient changes with time. Also, conductors lose homogeneity on prolonged exposure to high temperatures. Different thermocouple varieties are available to suit diverse applications, such as type J, K, T, N etc. Some features of the thermocouple that lender them upper hands are: