How Does a Metallic Thermometer Work?
A metallic thermometer works on the principle of thermal expansion of metals. It utilizes the predictable expansion and contraction of metallic components in response to temperature changes.
Overview
Working Principle
1. Thermal Expansion:
When the temperature increases, the metal with the higher coefficient of thermal expansion expands more than the other metal. This causes the strip to bend in one direction.
When the temperature decreases, the opposite happens, and the strip bends in the other direction.
2. Mechanical Translation:
The bending motion is converted into rotational movement using mechanical linkages.
This movement is used to move a pointer across a scale to display the temperature reading.
Applications
Industrial Processes: Measuring temperatures in furnaces, kilns, and boilers.
Household Use: Thermostats, ovens, and refrigerators.
Marine Use: Monitoring machinery or environmental temperatures on ships.
