Hugh Johnson is always training in order to keep up with the latest in Infra Red.
He has achieved a Level One in Thermograghy with the Infraspection Institute.
How Do Thermal Imaging Infrared Cameras Work
An infrared camera is a non-contact device that detects infrared energy (heat) and converts it into an electronic signal, which is then processed to produce a thermal image on a video monitor and perform temperature calculations. Heat sensed by an infrared camera can be very precisely quantified, or measured, allowing you to not only monitor thermal performance, but also identify and evaluate the relative severity of heat-related problems.