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Types Of Infrared Thermometers
Mar 22, 2018

The most commonly used infrared thermometers are the spot infrared thermometer or infrared pyrometer, which measures the temperature at a spot on a surface (actually a relatively small area determined by the D:S ratio). These usually project a visible red dot onto the center of the area being measured; this identifies the spot being measured but plays no part in the measurement. The actual angular area being measured varies among instruments and is not restricted to the visible spot.

Related equipment, although not strictly thermometers, include infrared scanning systems and infrared thermal imaging cameras. Infrared scanning systems scan a larger area, typically by using what is essentially a spot thermometer pointed at a rotating mirror. These devices are widely used in manufacturing involving conveyors or "web" processes, such as large sheets of glass or metal exiting an oven, fabric and paper, or continuous piles of material along a conveyor belt. Infrared thermal imaging cameras or infrared cameras are essentially infrared radiation thermometers that measure the temperature at many points over a relatively large area to generate a two-dimensional image, called a thermogram, with each pixel representing a temperature. This technology is more processor- and software-intensive than spot or scanning thermometers, and is used for monitoring large areas. Typical applications include perimeter monitoring used by military or security personnel, inspection / process quality monitoring of manufacturing processes, and equipment or enclosed space hot or cold spot monitoring for safety and efficiency maintenance purposes.

photographic camera using infrared film and suitable lens, etc., is also called an "infrared camera". This only captures the near infrared and is not sensitive to the thermal radiation from room temperature objects.