Infrared thermometers (guns) have relatively high environmental requirements. The best working environment is 16 degree to 35 degree . Usually, the body temperature is measured at an ambient temperature lower than 16 degree , and the data will have a large deviation or even cannot be displayed. The manual generally recommends that the measurement be performed in a place without strong convection, without high humidity, with a relatively constant temperature and in line with the declared ambient temperature of the thermometer. When using the thermometer outdoors in winter, users should pay attention to keeping the thermometer warm (put it in a warm place) to avoid long-term exposure to ultra-low temperature or direct sunlight to ensure that there is no deviation in temperature measurement.
