Liquid Metal Used In Thermometers

Another substance used in glass thermometers is alcohol.

Liquid metal used in thermometers.

Silver liquid indicates that the thermometer contains mercury while red liquid is alcohol to which red coloring has been added. Lastly you do not need an external power source like a battery or electricity to run a mercury thermometer. 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. A thermometer has two important elements.

It s used in thermometers because it has high coefficient of expansion. And 2 some means of converting this. 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.

It is the only metal that is liquid at room temperature. A thermometer is a device that measures temperature or a temperature gradient the degree of hotness or coldness of an object. 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.

Function the liquid in a thermometer typically stays in a bulb at the bottom of the device. Mercury can be used in thermometers. Because liquids expand as temperatures rise the. In addition mercury is the only metal that is a liquid at room temperature making it an attractive candidate.

Most metals are good conductors of heat and they are solids at room temperature.