A temperature differential at each end will produce a voltage.
The resultant electromotive forces will be proportional to the temperature difference between junctions. Thermocouple is the most suitable method for measuring temperature, sometimes the only method.
Type E The thermocouple is interesting to measure temperatures.
It is used in applications requiring high values of EMF and resistance to oxidation in a higher range of working temperatures ranging from 150 ° C to 870 ° C.It is sometimes used in thermal generators (in thermopiles).Some investigators studied the effects of addition of sacrificial reagents and carbonate salts to prohibit rapid recombination of electron/hole pairs and backward reactions.Other research focused on the enhancement of photocatalysis by modification of by means of metal loading, metal ion doping, dye sensitization, composite semiconductor, anion doping and metal ion-implantation.The thermocouples are used between others for nuclear reactors, nuclear submarines, jet aircraft, industrial kilns and other industrial heat treatment (measure and control of temperature).
The thermocouples can be created with numerous combinations of alloys.
These alloys are used when seeking higher electromotive force, which, in turn, will facilitate the piloting of electronic measuring devices.
These systems are particularly requested for the leading of equipment where safety is a priority (for sensors flames of gas, safety valves ...).
Therefore, they play an important role in the development of efficient photocatalytic hydrogen production.
The principle of a thermocouple, due to Seebeck's discovery is a circuit formed by using two different kind of metal conductors which are joined at the ends.
RESCAL has developed specific casts for application "thermopile".