How infrared thermometers work
Understanding the working principle, technical indicators, environmental working conditions, operation and maintenance of infrared thermometers is the basis for users to choose and use infrared thermometers correctly. The optical system collects the infrared radiation energy of the target in its field of view, and the size of the field of view is determined by the optical parts and position of the thermometer. The infrared energy is focused on the photodetector and converted into a corresponding electrical signal. The signal is converted into the temperature value of the measured target after being corrected by the amplifier and signal processing circuit according to the algorithm inside the instrument and the target emissivity. In addition, the environmental conditions of the target and the thermometer should also be considered, such as the influence of factors such as temperature, atmosphere, pollution and interference on the performance index and the correction method.
All objects with a temperature above absolute zero are constantly emitting infrared radiation energy into the surrounding space. The magnitude of an object's infrared radiation energy and its distribution by wavelength - is closely related to its surface temperature. Therefore, by measuring the infrared energy radiated by the object itself, its surface temperature can be accurately determined, which is the objective basis on which infrared radiation temperature measurement is based.
