Thermal Imaging or Thermography is a widely used technique, highly valuable not only in maintenance engineering, but also for military and surveillance systems. Thermographic cameras detect radiation in the long-infrared range of the electromagnetic spectrum and produce images of that radiation, called thermograms. Infrared radiation is emitted by all objects with a temperature above absolute zero, and the amount of radiation emitted increases with temperature, making it possible to analyze its variations, where warm objects stand out well against cooler backgrounds.

By using this technique, technicians are able to identify and avoid possible thermal problems before they become critical or a failure. Those problems are often associated with faulty electrical or mechanical components in any type of equipment.