Which is more accurate, thermometer or mercury thermometer?

It is more accurate to measure body temperature with a mercury thermometer than with a forehead temperature gun.

Because mercury thermometers are less affected by external factors when measuring body temperature.

Mercury thermometer adopts glass structure, which is relatively compact. Mercury contained in the thermometer has stable performance and is less affected by external factors. When measuring the temperature of armpit, mouth or rectum with mercury thermometer, it can truly reflect the body temperature. As long as the operation is standardized and the temperature is measured with a mercury thermometer, the accurate temperature value can basically be obtained.

The forehead temperature gun uses infrared technology to measure the local body surface temperature, which is simple to operate and can get the result in a few seconds. Because there is no need to touch the skin, many people can prevent cross-infection when measuring their body temperature with a forehead temperature gun.

However, the application of forehead temperature gun to measure body temperature is often affected by many factors, such as high ambient temperature and warm stickers on the body of the subject, which will make the measured body temperature higher than the actual body temperature.

If the weather is cold, measure the temperature of people who are outdoors for a long time, and the obtained temperature value is lower than the actual temperature value. If the weather is hot, the forehead sweats a lot, the sweat takes away the heat, and the skin temperature drops, the measured body temperature is low.

There are many interference factors in measuring body surface temperature with body temperature gun, and the results are easy to produce errors. Mercury thermometers usually measure armpits, mouth or rectum. Because the measured part is closer to the inside of human body, the result is more accurate than that of temperature measuring gun.