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An infrared thermometer is a thermometer which infers temperature from a portion of the thermal radiation sometimes called black-body radiation emitted by the object being measured. They are sometimes called laser thermometers as a laser is used to help aim the thermometer, or non-contact thermometers or temperature guns, to describe the device's ability to measure temperature from a distance. By knowing the amount of infrared energy emitted by the object and its emissivity, the object's temperature can often be determined within a certain range of its actual temperature. Infrared thermometers are a subset of devices known as "thermal radiation thermometers".
In the Contact Type Infrared Thermometer, a small black-body chamber is in contact with the object. A small infrared sensor installed inside the chamber measures the emission of the black-body walls. In the Non Contact Infrared Thermometer, the lens is directed to the object, and the instrument reads the ave... [Details]