How Does an Aneroid Barometer Work?
An aneroid barometer is a precise instrument used to measure atmospheric pressure without the use of liquids. It features a sealed, partially evacuated metal canister with a flexible metal diaphragm on top. As air pressure changes, the canister responds accordingly:
When atmospheric pressure increases, the canister compresses, and the diaphragm moves inward.
When atmospheric pressure decreases, the canister expands, and the diaphragm moves outward.
These subtle movements are mechanically amplified and displayed on a dial, allowing the user to read the current air pressure. Aneroid barometers are widely used in homes, boats, and weather stations to track pressure trends and help forecast changes in the weather.
