Different thermometers measure body temperature with a difference of 1 degree. Which one should I buy?

Science Fiction Network, December 22, recently, netizens found that when using a thermometer to measure body temperature, the temperature measured by two different thermometers was 1°C different, and if there is a mercury thermometer, most people think that the mercury one will be more accurate. Is the difference between the two different thermometers really so big? Which one is more reliable?

Mercury thermometer is a traditional glass thermometer, and mercury thermometer is also widely used in hospitals, because mercury thermometer has many advantages, such as accurate reading, high stability, low price, no need for power supply, easy to clean, easy to disinfect, and simple to use. But it also has many disadvantages, such as difficult to read, long measurement time (5-10 minutes), glass material, easy to break, and the mercury leaked after breaking will pollute the environment and endanger human health.

Ear thermometers and forehead thermometers mainly rely on sensors to receive infrared rays from the human body to determine body temperature, but forehead thermometers are more convenient and faster, and are often used in places with large traffic such as kindergartens, playgrounds, airports, and train stations where rapid screening of fever patients is required. However, infrared temperature measurement is easily affected by ambient temperature and can only work within a certain temperature range.

In addition, there are electronic thermometers placed under the armpits. The electronic thermometer outputs electrical signals through the temperature sensor, which are then converted into digital signals that can be recognized by the internal integrated circuit, and finally the display shows the temperature. Its accuracy error generally does not exceed 0.1℃, but the aging of electronic components and insufficient battery power may affect the accuracy. (Editor: Qin Yingying)