During the epidemic, citizens need to have their body temperature measured when they enter communities, companies, and shopping malls, and there are many questions about infrared forehead thermometers, ear thermometers and other appliances. The reporter interviewed experts from the Metrology Department of the Shanghai Municipal Market Supervision Bureau on issues of concern to the public, and answered some questions about the forehead thermometer.
Question 1: What kind of environment is required for forehead thermometer measurement?
A: The working environment of infrared forehead thermometer is generally between 16-35°C. If you work outdoors in a low temperature environment for a long time, the obtained values are prone to deviations. It is recommended to use it indoors in a windless environment. In addition, some infrared forehead thermometers have a physical temperature mode and a body temperature mode, and you should make sure that the infrared forehead thermometer is placed in body temperature mode.
Question 2: How can I get an accurate body temperature?
Answer: The infrared forehead thermometer measures the midpoint of the object from the center of the eyebrows to the hairline (also known as the center of the forehead). The measurement distance should meet the requirements of the manual, generally ranging from about 1-5 cm, to ensure that there is no cover from hair, sweat, hats, etc. When repeating the measurement, remove the infrared thermometer probe first and wait 5 seconds before taking the next measurement.
Question 3: Why does the body temperature sometimes go up and down?
A: The environment in which the person is tested can affect the reading. For example, turning on the heater in the car for a long time, being outdoors in a low temperature environment for a long time, and after strenuous exercise, it may cause the surface temperature of the forehead to be temporarily high or low.
Question 4: What should I do if my body temperature fluctuates?
A: It is recommended that the subject should wait for the body temperature to balance before taking the measurement. For example, turn off the heating in the car when you are almost at the temperature measurement point, or get out of the car to measure at the temperature measurement point. After strenuous exercise, you should rest and adjust for a few minutes before taking the measurement.
Question 5: Is there any other way to measure the forehead temperature?
Answer: When using a handheld infrared thermometer, in principle, it should be operated in strict accordance with the instructions to ensure the accuracy of the value; It is normal to take measurements on different parts of the body and have a slight deviation in the results; In winter and spring, due to the low temperatures, it is advisable to measure the parts wrapped in clothing or scarves, such as the wrists or neck, when measuring people entering the room from outside or when using a thermometer outdoors, so that the measurement can be closer to reality.
Question 6: Many places do not have indoor temperature measurement conditions, what should I do if I measure outdoors at low temperatures?
A: There are two ways to do this. Method 1: First measure a reference temperature from a non-febrile person (such as yourself or a colleague), use it as a benchmark, and immediately take a second measurement once it is significantly higher than the benchmark temperature. Method 2: Stick the warm baby on the outside of the thermometer to help maintain the normal working temperature.
Question 7: At present, it is difficult to buy forehead thermometers, can industrial infrared thermometers be used to measure human body temperature?
Answer: Generally, the measurement range of industrial infrared thermometer is 30°C-1000°C, and the measurement accuracy in the human body temperature range is generally greater than ±1.0°C, which is not suitable for human body temperature measurement.
Question 8: How long does the forehead thermometer need to be calibrated?
Answer: The use environment and use of each forehead thermometer are different, and there is no unified regulation for such measuring instruments that are currently not compulsory verification, and users can decide independently according to the frequency of use and usage. If the frequency of use is high, the calibration interval can be shortened accordingly.
Question 9: Do I need to calibrate my newly purchased forehead thermometer?
Answer: Generally speaking, although the new forehead thermometer has been inspected and tested by the factory, considering that some companies are batch by batch inspection, as well as product transportation factors, it is recommended to calibrate before use to ensure that the value of the forehead thermometer is accurate and reliable.
Question 10: If there is a real demand, how to send it for inspection?
Answer: At present, metrology departments across the country are fully engaged in the front line of epidemic prevention and control to ensure that the infrared body temperature measurement value is accurate and reliable. Local metrology departments have opened a green channel for epidemic prevention and control temperature measurement equipment services, and local metrology institutes can be contacted if there is a testing need. Shanghai Institute of Metrology and Testing Technology is carrying out free testing of forehead thermometers, ear thermometers, and medical electronic thermometers used in public places, but due to the current demand for testing, it is recommended that communities, shopping malls, office buildings, and parks be collectively sent for testing.
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