What Instrument Measures Atmospheric Pressure?
Barometer
The primary instrument used to measure atmospheric pressure is called a barometer.
Barometers come in various types, the most common being the mercury barometer and the aneroid barometer.
A mercury barometer consists of a glass tube filled with mercury, which is inverted into a dish of mercury.
The atmospheric pressure causes the mercury to rise or fall in the tube. This change in height is measured and correlated
with pressure adjustments, providing accurate readings of atmospheric pressure.
On the other hand, an aneroid barometer uses a sealed, flexible metal chamber. As atmospheric pressure changes, the chamber expands or contracts, which moves a needle on a dial to indicate pressure levels.
This design is often found in portable weather instruments and is advantageous for its convenience and lack of liquid.
Both types of barometers are essential for various applications, including weather forecasting, altitude measurements, and scientific research.
Understanding atmospheric pressure is crucial for interpreting weather patterns and is fundamental in meteorology.