Clinical thermometer

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A clinical thermometer is a thermometer used to measure body temperature. Most old ones use mercury. It is accurate and sensitive, because it has a narrow place where the liquid rises very fast.

It is used in clinic by doctors so it is called a doctor's thermometer also. Most of these thermometers show both scales, Celsius scale and Fahrenheit scale. The scale runs from 35 degree Celsius to 42 degree Celsius.