Some times red coloured liquid is used but mostly gray coloured liquid is used.
As a substitute for Mercury (liquid metal), thermometers used a thermometric liquid (typically alcohol mixtures containing toluene, kerosene or isoamyl acetate).
coloured achohal
For non-electronic thermometers , you will either see a red liquid or a silver liquid. The 'Red liquid' is a coloured alcohol. The 'Silver liquid' is mercury.
mercury
iodine and Mercury
Coloured alcohol in most.
Mercury thermometers have advantages over alcohol thermometers. The liquid is visible making the results easy to read. It expands at a regular interval. It measures temperature quickly and accurately.
For non-electronic thermometers , you will either see a red liquid or a silver liquid. The 'Red liquid' is a coloured alcohol. The 'Silver liquid' is mercury.
The liquid in a clinical thermometer is often mercury. But there are thermometers that use a coloured alcohol.
Mercury is used in thermometers.
If the liquid is silver, it is liquid mercury (Hg). If the liquid is red, it is coloured ethyl alcohol (C2H5OH).
simply to know the temperature, if it wasn't coloured how would you know that the temp. is 37 c and not 100 c
Mercury
Mercury!
Most thermometers used to contain Mercury until it was found to be toxic.
Most thermometers used to contain mercury until it was found to be toxic.
Mercury (Atomic number 80) is still used in some thermometers.
mercury
Mercury is a liquid metal used in thermometers. However, it becomes a solid at -37.9 F and it can cause mercury poisoning if ingested or inhaled. Therefore, most theremometers use ethyl-alcohol or a plastic strip covered with liquid crystals (called a liquid crystal thermometer).