Source: wikibot/thermometers
= Thermometers
{wiki=Thermometers}
A thermometer is an instrument used to measure temperature. It provides a quantitative assessment of how hot or cold an object or environment is. Thermometers operate on various principles, including thermal expansion, electrical resistance, and radiation. \#\#\# Types of Thermometers: 1. **Liquid-in-glass Thermometers**: These consist of a glass tube filled with a liquid (commonly mercury or colored alcohol).