Alcohol thermometer
(Redirected from Spirit thermometer)
Alcohol thermometer is a type of thermometer that uses alcohol as a thermometric liquid. Unlike the more commonly used mercury thermometer, the alcohol thermometer is safer to use due to the non-toxic nature of alcohol.
History[edit | edit source]
The alcohol thermometer was invented by Daniel Gabriel Fahrenheit in the early 18th century. Fahrenheit, a Polish-German physicist, engineer, and glass blower, is also known for inventing the Fahrenheit scale of temperature measurement.
Design and Function[edit | edit source]
The alcohol thermometer consists of a sealed glass tube filled with alcohol, typically ethanol or toluene, with a small air space at the top. The alcohol is colored with a dye (usually red or blue) to make it easily visible. As the temperature increases, the alcohol expands and rises up the tube. The temperature can then be read by observing the level of the liquid.
Advantages and Disadvantages[edit | edit source]
Alcohol thermometers have several advantages over mercury thermometers. They are safer to use, as alcohol is not toxic and does not pose a health risk if the thermometer is broken. Alcohol also has a lower freezing point than mercury, making alcohol thermometers useful for measuring very low temperatures.
However, alcohol thermometers also have some disadvantages. They are not as accurate as mercury thermometers, especially at very high temperatures. Alcohol also evaporates faster than mercury, which can lead to errors in temperature measurement.
Uses[edit | edit source]
Alcohol thermometers are commonly used in a variety of settings, including schools, homes, and laboratories. They are particularly useful for measuring outdoor temperatures, as they can accurately measure temperatures below the freezing point of water.
See Also[edit | edit source]
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