The reason why the infrared thermometer occupies such an important position in the process of comprehensive resumption of work and production is because of its advantages, which can realize non-contact, 24-hour uninterrupted work, no need for the cooperation of the tested personnel and no sense of being tested; The measured person completes the temperature measurement without stopping during normal walking, and the efficiency of temperature measurement is obviously more than 3 times higher than that of hand-held temperature measurement.

The working principle of infrared thermometer is that in nature, in addition to visible light (usually called visible light), there are invisible lights such as ultraviolet rays and infrared rays. Any object in nature whose temperature is higher than absolute zero (-273℃) radiates electromagnetic waves (infrared rays) at any time, so infrared rays are the most extensive electromagnetic waves in nature, and thermal infrared rays will not be absorbed by atmospheric smoke clouds. With the rapid development of science and technology, thermal radiation is detected and measured by using the characteristics of infrared, applying electronic technology and combining computer software with infrared technology. The thermal sensor obtains different thermal differences according to the heat radiated from the surface of the object, and through the processing of electronic technology and software technology, it presents images with different brightness or color difference, which is what we usually call infrared thermal imaging; After the surface heat of radiation source is converted by thermal radiation algorithm, the conversion between thermal image and temperature is realized. Infrared thermometers are widely used in military, medical, engineering construction, equipment maintenance and many other fields.

Because of the principle of infrared thermometer and its advantages in practical use, it is very suitable for complex application scenes such as communities, campuses, hospitals, scenic spots, hotels, shopping malls, enterprise office buildings, public service places, construction sites and so on, which are crowded and need to monitor and control body temperature. In the aspect of epidemic prevention and control, the potential risk caused by large-area contact with human body during temperature measurement is effectively reduced, the temperature measurement time of human body is shortened, and the temperature measurement efficiency is improved. At the same time, centralized management provides real-time data support for the screening and tracking of suspected patients and migrants, and provides strong security for the management in the above scenarios.