Olaus Roemer
The colour makes the alcohol easier to see inside the thin glass thermometer.
The liquid in a clinical thermometer is often mercury. But there are thermometers that use a coloured alcohol.
There are many kinds of thermometer in use. Liquid in glass thermometers usually contain alcohol (dyed red or blue) or mercury (silvery coloured).
No, it is not safe to use rubbing alcohol in a simple thermometer. Rubbing alcohol is a disinfectant and can affect the accuracy of the thermometer readings. It is recommended to use a thermometer as per the manufacturer's instructions.
The first liquid used in a thermometer was likely alcohol, specifically ethanol. Alcohol has a low freezing point and a wide range of expansion when heated, making it suitable for use in early thermometers.
Yes, it can and you can purchase thermometers which use alcohol.
stick it somewhere and read the temperature reading where the coloured line is.
because it would turn to ice and alcohol wouldn't
To clean a thermometer with rubbing alcohol, it is generally recommended to use enough alcohol to wet a cotton ball or pad. You can then gently swab the thermometer with the alcohol-soaked cotton to disinfect it before rinsing with water.
u don't have to flick the thermometer to reset the temperature reading when you use an alcohol based thermometer (unlike a mercury thermometer where you have to flick and flick and flick flick flick that thermometer for the mercury to be reset so that you can make an accurate reading) a disadvantage is that the alcohol thermometer is slightly less acurate The biggest advantage is that alcohol is not nearly as toxic as mercury, so that if the thermometer breaks, you won't be poisoned.
We still use colored alcohol for our liquid in everyday thermometers.
To disinfect a thermometer, first wash it with soap and warm water. Then, wipe it down with a disinfectant solution that is safe for use on medical devices, such as isopropyl alcohol. Allow the thermometer to air dry before using it again.