How to ensure the accuracy of temperature measurement with non-contact thermometer
In order to prevent and control the epidemic, various places have started to monitor the body temperature of relevant personnel. Infrared forehead thermometers, infrared ear thermometers, etc. are common body temperature monitoring equipment. How to use these equipment correctly? Experts from the Ningbo Center for Disease Control and Prevention and the Ningbo Institute of Metrology and Testing answered the questions for the citizens.
Our common body temperature measurement equipment is mainly divided into contact type and non-contact type. The biggest difference between the two is whether it touches the skin of the person under test. At present, most of the equipment used for epidemic prevention and control are non-contact type thermometers. In terms of measurement accuracy, the contact type is higher than the non-contact type.
The normal human body temperature is about 36.3 to 37.2 degrees Celsius, and the temperature of different parts is also different. The temperature of the rectum or ear drum is 0.3-0.6 degrees Celsius higher than the oral temperature, while the temperature of the armpit is 0.3-0.6 degrees Celsius lower. So why is there an inaccurate temperature measurement? First of all, air, dust, sweat, occlusion, etc. will all have a certain impact on the body temperature test; secondly, some thermometers have two functions of surface temperature and body temperature, and the wrong mode selection will lead to inaccurate test results; In terms of choice, it is not that the more expensive the thermometer, the better, and the infrared ear thermometer worth tens of dollars can measure accurately if used correctly.
So, how to ensure accurate temperature measurement? 20-30 minutes before measuring body temperature, avoid strenuous exercise, eating, drinking cold or hot water, do not apply cold or hot compresses, and maintain emotional stability and do not be nervous. If you suspect that the temperature is inaccurate, you can repeat the measurement several times; calibrate the thermometer regularly and find that the data error is large, it is recommended to stop using it; at the entrance and exit of the expressway, when waiting in line for temperature measurement, the people in the car should be at least five to ten minutes in advance Open the window to keep the temperature of the human body and the external environment in thermal equilibrium before measuring.
