[I:http://bradentonlawnservice.com/wp-content/uploads/2013/04/RogerFrost20.jpg] Thermal imaging cameras detect radiation in the infrared range of the electromagnetic spectrum (roughly 9,000-14,000 nanometers or 9-14 m) and produce images of that radiation, called thermograms. Since infrared radiation is emitted by all objects above absolute zero according to the black body radiation law, thermography makes it possible to see one’s environment with or without visible illumination.
Thermal imaging cameras detect radiation in the infrared range of the electromagnetic spectrum (roughly 9,000-14,000 nanometers or 9-14 m) and produce images of that radiation, called thermograms. The amount of radiation emitted by an object increases with temperature; therefore, thermography allows one to see variations in temperature. When viewed through a thermal imaging camera, warm objects stand out well against cooler backgrounds.
Thermography is commonly used to identify air change rates with the help of the so-called ‘blower-door’ process, which creates under-pressure in buildings. Because the air pressure outside is higher than the pressure inside, the air will try to enter through unsealed areas. Using an infrared camera, this airflow can easily be seen, clearly revealing any unsealed areas, which can then be attended to before coverings and fittings make correcting this potential fault both expensive and time-consuming.
Infrared photography is often confused with thermal imaging. The difference is basically one of wavelength of electromagnetic radiation since the infrared light with which my photographs are taken lies just beyond visible red light: this is why it is called near infrared. Near infrared radiation is not related to the temperature of the object being photographed – unless the object is extremely hot – since the object is not actually the source of the radiation. It is just reflecting it.
Mould, mildew and moisture detection are some of the common tasks that thermal imaging is used for during a home inspection. Where there is moisture, there is “evaporative cooling”. With the use of the IR camera, we can identify areas of moisture and potential breeding grounds for biological growth. Thermography or infrared detection is the leading tool in diagnosing water damage.
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