1. To give an account of in speech or writing.

2. To convey an idea or impression of; characterize: She described her childhood as a time of wonder and discovery.

3. To represent pictorially; depict: Goya's etchings describe the horrors of war in grotesque detail.

4. To trace the form or outline of: describe a circle with a compass

Thermal imaging cameras display an object’s heat signature pictorially. Through calibrated measurements of infrared energy, temperature data is converted into color coded mapping of the different thermal zones.

The resulting pictures can be stored, digitized or converted into common files that allow for interpretation and manipulation in commercial software applications. Since thermal imaging devices measure energy in the infra red spectrum, there is no requirement for visible light during the capture process.

Exploring Thermography

Radiated energy is primarily a function of thermal efficiency. Any substance that has a temperature above 0 degrees Kelvin radiates infrared energy. Thermal imaging cameras scan an object and record the differing temperatures of the surface area in front of the camera.

There are several different platforms used to map exterior temperatures. These instruments vary based on price, sensitivity and measurement range. Thermal imaging cameras are properly evaluated based on ease of use, display screen size, resolution, battery life and durability. Most importantly, the sensitivity of the infrared sensor determines the accuracy and detail of the display.

Other features available on advanced models include portability, digital storage, audio recording and mounting devices. Since thermal imaging cameras are expensive and mechanically complex, a thorough examination of the warranty policy is advised.

Thermal Imaging Applications

Thermal imaging technology has substantial practical applications in the construction industry. HVAC technicians use thermography to detect leaks in ductwork and gaps in the building envelope. Plumbing companies, insulation auditors and facilities management personnel in large institutions use thermal imaging to detect breaches in process piping and mechanical systems.

Firefighters use extremely sensitive thermal imaging equipment to identify hot spots in buildings before major fires break out. Precise measurements of semiconductor temperatures in the electronics industry can help identify faulty circuits and predict future failure rates.

Evolving Technology

The latest imaging technology includes removable storage devices that plug directly into a computer. The large screen and high resolution of a computer display provides greater thermal imaging details. The superior processing capacity of a modern CPU offers a faster refresh rate and more efficient manipulation of data. This saves on the need to invest in a separate display, more memory and greater storage capacity.

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