Which is more accurate, thermometer or mercury thermometer?

It is more accurate to measure body temperature correctly with mercury thermometer than temperature measuring gun, because mercury thermometer is 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 really 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.

Advantages and disadvantages of temperature gun:

The body 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 temperature gun.

However, the application of body temperature gun to measure body temperature is often influenced by many factors, such as high ambient temperature, sticking warm stickers on the tested body, etc., 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.