Liquid Metal Used In Thermometers

Although uncommon in modern thermometers a clear color indicates water.

Liquid metal used in thermometers.

It is also cheap to acquire and very accurate at measuring high temperatures. Lastly you do not need an external power source like a battery or electricity to run a mercury thermometer. Hence the slightest change in temperature is notable when it s used in a thermometer. It s used in thermometers because it has high coefficient of expansion.

It is the only metal that is liquid at room temperature. Because liquids expand as temperatures rise the. Another substance used in glass thermometers is alcohol. A thermometer has two important elements.

1 a temperature sensor e g. Mercury is the only one in liquid state at room temperature. Most metals are good conductors of heat and they are solids at room temperature. 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.

And 2 some means of converting this. A thermometer is a device that measures temperature or a temperature gradient the degree of hotness or coldness of an object. 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. Silver liquid indicates that the thermometer contains mercury while red liquid is alcohol to which red coloring has been added.

Mercury can be used in thermometers.