The choice of an infrared thermometer can be broken down into three main aspects:
In terms of performance indicators, such as temperature range, spot size, working wavelength, measurement accuracy, response time, etc.; in terms of environment and working conditions, such as ambient temperature, window, display and output, protective accessories, etc.; in terms of other options, such as ease of use, maintenance Calibration performance and price also have a certain impact on the choice of thermometer. With the continuous development of technology, the best designs and new advances in infrared thermometers have provided users with various functional and multi-purpose instruments, expanding their choices.
Explanation of the signal processing function of the infrared thermometer to determine the temperature measurement range: The temperature measurement range is the most important performance indicator of the thermometer. Each model of thermometer has its own specific temperature measurement range. Therefore, the user's measured temperature range must be considered accurately and comprehensively, neither too narrow nor too wide. According to the blackbody radiation law, the change in radiant energy caused by temperature in the short-wavelength band of the spectrum will exceed the change in radiated energy caused by the emissivity error. Therefore, shortwave should be used as much as possible when measuring temperature.
Determine the target size: Infrared thermometers can be divided into single-color thermometers and double-color thermometers (radiation colorimetric thermometers) according to their principles. For a monochromatic thermometer, when measuring temperature, the measured target area should fill the field of view of the thermometer. It is recommended that the size of the measured target exceeds 50% of the field of view. If the target size is smaller than the field of view, the background radiation energy will enter the visual and acoustic signals of the thermometer and interfere with the temperature measurement reading, causing errors. In contrast, if the target is larger than the thermometer's field of view, the thermometer will not be affected by the background outside the measurement area.
Explanation of the signal processing function of the infrared thermometer to determine the optical resolution (distance system is sensitive) The optical resolution is determined by the ratio of D and S, which is the ratio of the distance D between the thermometer and the target to the diameter of the measurement spot S. If the thermometer must be installed far away from the target due to environmental conditions, and small targets need to be measured, a thermometer with high optical resolution should be selected. The higher the optical resolution, that is, the higher the D:S ratio, the higher the cost of the thermometer.
