http://www.ir55.com/milcam.html [Broken]INFRARED IMAGER AND IR THERMAL CAMERA CATALOG
...Thermal images cannot see through walls, although you can gather much information about the inside of the wall as well as what is happening on the other side of the wall. For example you would not be able to see people and plants involved in an illicit indoor growing operation from the outside of the building. You would be able to see and monitor the heat escaping from the building that would be a telltale sign of an indoor growing operation. Click here for legal cases involving thermal infrared for narcotics detection You would also be able to see things like studs inside the walls, or damaged insulation in roofing applications. We hope that dispels a few of the most common myths regarding infrared energy. Thermal imagers in Hollywood and in real life are very different. The remainder of this paper will focus on the real life thermal imagers and how they work...
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