Thermal imaging is the use of a thermal imaging camera to "see" thermal energy emitted from an object. Thermal imaging cameras produce images of invisible infrared or "heat" radiation. Based on temperature differences between objects, thermal imaging produces a crisp image on which the smallest of details can be seen. They work both during daytime and nighttime. Infrared thermal camera penetrates through haze, smoke, rain, snow and total darkness to detect target from far distance. These thermal imaging cameras can be used for mobile, pan-tilt-zoom and fixed mount scenarios, ideal for security, perimeter monitoring, nuclear security and force protection. They can enhance or even replace your traditional daylight or lowlight CCTV systems, acting as security fence to bank, government building, nuclear power plant, petroleum and chemical plant, warehouse, port and airport where are vulnerable to theft and terrorist attack.