Liquid Metal Used In Thermometers

A thermometer is a device that measures temperature or a temperature gradient the degree of hotness or coldness of an object.

Liquid metal used in thermometers.

Another substance used in glass thermometers is alcohol. Most metals are good conductors of heat and they are solids at room temperature. A thermometer has two important elements. Mercury can be used in thermometers.

Function the liquid in a thermometer typically stays in a bulb at the bottom of the device. It is also cheap to acquire and very accurate at measuring high temperatures. In addition mercury is the only metal that is a liquid at room temperature making it an attractive candidate. The bulb of a mercury in glass thermometer or the pyrometric sensor in an infrared thermometer in which some change occurs with a change in temperature.

Silver liquid indicates that the thermometer contains mercury while red liquid is alcohol to which red coloring has been added. Because liquids expand as temperatures rise the. 1 a temperature sensor e g. However it is not the thermal expansion of the liquid that is measured but rather the increase in pressure that goes hand in hand with an increase in temperature.

Lastly you do not need an external power source like a battery or electricity to run a mercury thermometer. And 2 some means of converting this. It is the only metal that is liquid at room temperature. Although uncommon in modern thermometers a clear color indicates water.

Hence the slightest change in temperature is notable when it s used in a thermometer.