In laboratory thermometers, the level of mercury falls as soon as it is taken out of the thing we want to measure the temperature of. But in case of clinical thermometers the mercury does not fall after measuring the temperature of the human body.Why?
Basically, there are two types of thermometers: Clinical Thermometer and Laboratory Thermometer.
Some features of the Clinical Thermometer-
Some features of a laboratory thermometer-
Hence, Clinical thermometers have kinks that prevent the immediate fall in mercury levels and thus, the temperature can be seen even after the thermometer is removed from the human body.
As for laboratory thermometers, they do not have kinks but the temperatures can be easily noted with the thermometer in the object of which heat needs to be measured.
Some features of the Clinical Thermometer-
- Clinical Thermometers are used to measure the temperature of the human body.
- Clinical Thermometers have a special ridge known as the kink or constriction.
- A kink which is present in clinical thermometer restricts the immediate flow of the mercury in the bulb of the thermometer.
Some features of a laboratory thermometer-
- A laboratory thermometer is used in the laboratory (as its name suggests).
- Laboratory thermometers do not have a kink that prevents the immediate fall of the mercury into the bulb.
Hence, Clinical thermometers have kinks that prevent the immediate fall in mercury levels and thus, the temperature can be seen even after the thermometer is removed from the human body.
As for laboratory thermometers, they do not have kinks but the temperatures can be easily noted with the thermometer in the object of which heat needs to be measured.