In industry, temperature is one of the first observable parameters that will indicate the condition of operating processes and equipment. heat, or thermal energy, is a by-product of all work whether electrical, mechanical or chemical.

Heat is generated either intentionally or unintentionally, it is transferred, contained and otherwise attempted to be controlled or expelled to suit our process needs.

The resulting thermal behaviour of electrical, mechanical or process equipment can be a powerful clue to diagnose problems or predict reliability of industrial equipment.