What is alcohol thermometer?

An alcohol thermometer is a type of thermometer that uses alcohol as the liquid inside the sealed glass tube. Alcohol thermometers are typically filled with colored alcohol, such as red or blue, to make it easier to read the temperature scale. The alcohol expands or contracts with changes in temperature, causing the liquid level in the tube to rise or fall. This movement is then used to indicate the temperature on the scale marked on the glass tube.

Alcohol thermometers are commonly used in laboratory settings due to their high level of precision and accuracy. They can measure temperature ranges from -115°C to 78°C (-175°F to 172°F). Alcohol thermometers are also considered to be environmentally friendly, as they do not contain mercury like traditional mercury thermometers. However, alcohol thermometers can be more fragile and break easily compared to other types of thermometers.

Alcohol thermometers are used in various applications, such as monitoring the temperature of liquids, gases, and solids, as well as for measuring body temperature. They are not ideal for high-temperature measurements or for use in high-pressure applications.