Selecting an infrared thermometer can be divided into three areas
Performance indicators, such as temperature range, spot size, operating wavelength, measurement accuracy, response time, etc.; environmental and operating conditions, such as ambient temperature, window, display and output, protection accessories, etc.; other choices, such as ease of use, maintenance and calibration performance, and price, etc., but also the choice of the pyrometer has a certain impact. With the technology and continuous development, infrared thermometer optimal design and new advances provide users with a variety of functions and multi-purpose instruments, expanding the choice.
Infrared pyrometer signal processing functions explained to determine the temperature range: temperature range is the most important one of the performance indicators of the pyrometer. Each type of pyrometer has its own specific temperature measurement range. Therefore, the user's measured temperature range must be considered accurately and thoroughly, neither too narrow nor too wide. According to the law of blackbody radiation, in the short wavelengths of the spectrum by the temperature-induced changes in radiant energy will be more than by the emissivity error caused by the change in radiant energy, therefore, temperature measurement should try to choose the better short-wave.
Determine the target size: infrared thermometer according to the principle can be divided into monochrome pyrometer and two-color pyrometer (radiation colorimetric thermometer). For single-color pyrometer, in the temperature measurement, the measured target area should be filled with pyrometer field of view. It is recommended that the target size exceeds 50% of the field of view size. If the target size is smaller than the field of view, the background radiant energy will enter the pyrometer's visual acoustic signature and interfere with the temperature reading, resulting in an error. On the contrary, if the target is larger than the field of view of the pyrometer, the pyrometer will not be affected by the background outside the measurement area.
Infrared thermometer signal processing functions explained to determine the optical resolution (distance system sensitive) Optical resolution is determined by the ratio of D and S, is the thermometer to the target between the distance D and the measurement of the spot diameter S ratio. If the pyrometer must be installed away from the target due to environmental conditions, but also to measure small targets, you should choose a high optical resolution pyrometer. The higher the optical resolution, i.e. increasing the D:S ratio, the higher the cost of the pyrometer.
