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 environmental temperature, window, display and output, protective accessories, etc; Other options, such as ease of use, maintenance and calibration performance, and price, also have a certain impact on the selection of temperature detectors. With the continuous development of technology, the excellent design and new advancements of infrared thermometers provide users with various functions and multi-purpose instruments, expanding their choices.