Reasons for the differences in body temperature measurements taken with infrared thermometers
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Infrared thermometers cannot measure a person’s body temperature; they can only measure the temperature of the skin’s surface. It should be noted that there are individual differences in skin surface temperature, and even for the same person, the skin temperature varies depending on the conditions – for example, it increases significantly after exercise, and it drops noticeably after washing the face with cold water. However, at the moment, for situations with large crowds, there is no inexpensive and practical device that can quickly measure human body temperature. Therefore, in airports, transportation hubs, schools, businesses, and other places in China, infrared thermometers are still used to conduct a preliminary screening of the crowd; those showing abnormal readings are then checked individually using ear thermometers or other thermometers to confirm whether they have a fever ； This is also a relatively effective method. :)
It is possible, but mainly the instruments do not meet the requirements; this has a significant impact on the temperature of the human body surface, and the temperature changes rapidly. Therefore, only rough measurements can be taken
Infrared temperature measurement involves converting the energy of infrared radiation into the corresponding temperature. In addition to the accuracy of the instruments, environmental interference can also affect the measurement results. Furthermore, many instruments have their own measurement range; deviations become significant once outside this range.
In situations with large crowds, where there is overcrowding and poor air circulation, factors such as being in a hurry can also lead to an increase in body temperature.
Now someone is recommending a thermometric gun that works on the same principle; is the error in that case very large?
Well, it makes sense. For places with high foot traffic, this is probably the best and simplest method for measurement at the moment. Although it’s not very accurate, it can still be used as a preliminary testing tool! ! !