Description
an alcohol thermometer, which is a type of glass thermometer that uses alcohol as the thermometric fluid instead of mercury.
Features
Alcohol thermometers are often used as a safer alternative to mercury thermometers because the alcohol is less toxic. The alcohol inside the thermometer is typically colored with a red or blue dye to make it more visible. When the temperature rises, the alcohol expands and moves up the narrow glass tube, allowing the temperature to be read against a calibrated scale. Ethanol is the most common type of alcohol used in these thermometers due to its low cost and relatively low hazard.