Measurements accuracy of medical thermometer and IR thermometer in the COVID-19

− Handmade calibration blackbody furnace using a standard thermometer −

Abstract

Body temperature measurement is popular to confirm the disease of the new coronavirus. In particular, the use of non-contact thermometers, which have a short time for measurement, is increasing. When the skin surface such as the forehead is measured with a radiation thermometer that used to measure radiant energy, it shows about 34 ° C instead of 36.6 ° C. Therefore, this committee planned to try commercial products such as non-contact thermometers and to confirm their usage method and measurement of accuracy. We have already introduced a simple method for making a calibration furnace using a standard thermometer. However, the method of selecting a thermometer to be used at the same time cannot be overlooked. In order to improve reliability, the calibration method of the basic inexpensive standard glass thermometer with 1/10 scale will be described. IR thermometers showed around 30.6 ° C when the skin surface temperature was measured without any mode setting. However, when the skin surface temperature was measured by using human body mode of the thermometer, they showed 35.5 ° C to 35.8 ° C. In other products, it indicated Lo and could not measure. Therefore, it is necessary to understand the characteristics of the device and desirable to prepare the temperature calibration furnace shown in this paper.