Liquid Metal Used In Thermometers

Function the liquid in a thermometer typically stays in a bulb at the bottom of the device.

Liquid metal used in thermometers.

Most metals are good conductors of heat and they are solids at room temperature. 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. A thermometer is a device that measures temperature or a temperature gradient the degree of hotness or coldness of an object. 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.

Mercury is the only one in liquid state at room temperature. And 2 some means of converting this. In addition mercury is the only metal that is a liquid at room temperature making it an attractive candidate. Another substance used in glass thermometers is alcohol.

In liquid in metal thermometers also referred to as liquid filled thermometers a liquid is used as a thermometric substance in the same way as in liquid in glass thermometers. It is also cheap to acquire and very accurate at measuring high temperatures. Although uncommon in modern thermometers a clear color indicates water. Mercury can be used in thermometers.

Because liquids expand as temperatures rise the. It s used in thermometers because it has high coefficient of expansion. Lastly you do not need an external power source like a battery or electricity to run a mercury thermometer. A thermometer has two important elements.

1 a temperature sensor e g.