Thermal imaging cameras detect the heat given off by an object.  Thousands of sensors on the array convert the infrared energy into electrical signals, which create a video image.  Damp surfaces give off a cooler thermal profile than the surrounding area, due to evaporation. A thermal camera can be used when it comes to structural inspections, where the camera can find moisture leaks, that are otherwise invisible.  In electrical connections, a poor connection exits will cause high heat levels that can be detected by a thermal camera.  These poor connections are what cause fires commonly found in electrical panels.  This camera is also used to detect leaking heating and cooling systems, insulation and exposed water, and drain lines.  The camera can find partail blockages that could cause issues down the road.