How long does it take to measure the armpit with a thermometer?

The value can be read after the thermometer is placed under the armpit for about 5 minutes. Be sure to tighten it and not loosen it, otherwise the value read will be inaccurate and may be too low. When measuring body temperature in the armpit, the normal body temperature is between 36.1 degrees and 37 degrees. Under normal circumstances, anything over 37 degrees is considered a symptom of fever.

The working substance of the thermometer is mercury. The volume of its glass bubble is much larger than the volume of the thin tube above. The mercury in the bubble changes slightly due to the influence of body temperature. The expansion of the mercury volume causes obvious changes in the length of the mercury column in the tube. The human body temperature changes between 35°C and 42°C, so the scale of the thermometer is from 35°C to 42°C, and the range of each degree is divided into 10 parts, so the thermometer can be accurate to 1/10 degree.