Definition: Thermometer

A thermometer is an instrument used to measure temperature. The equal divisions on the thermometer are known as degrees. Temperature is usually measured in degree Celsius. The temperature of two common substances ice and boiling water is at 0 degree Celsius and 100 degree Celsius respectively.

Types of thermometers:

• Clinical thermometers
• constant volume gas thermometer
• thermocouple thermometer
• Platinum resistance thermometer