Mercury
thermometer
Ethanol (Ethyl alcohol) with a red dye in it. A thermometer with a silvery expanding liquid is Mercury.
The substance expands - and the tube (column) constrains it to go upwards.
Thermometric substance is the material used in the thermometer, whose property varies with temperature.
Mercury is used in thermometers. The mercury is the red substance in the thermometer that rises when you put it in your mouth.
Mercury is a silver-white to dim substance. In the event that your thermometer is loaded up with a red fluid, your thermometer contains red colored liquor or mineral spirits and not mercury.
specific heat thermometer
bulb
The substance in the thermometer (traditionally mercury (Hg)) rises up because of thermal expansion. As the substance heats up, it expands.
Mercury
If the liquid in a thermometer is red it is not mercury, it is alchohol which has been colouired.
The red line on a thermometer is the line that indicates what the thermometer is set to. If the red line is on 75, then the heat or the air will run until the temperature in the room gets to 75.
thermometer
the red part in a thermometer is mercury.
I don't think any substance is used in digital thermometer but according to my views "HEAT SENSORS" are used to measure the temperature.
Thermometer