What are the types of barometer?
The main types of barometer are the aneroid barometer and the mercury barometer. The abroad barometer works through air pressure exerting a force on a vacuum chamber; the mercury barometer works through the same principle, but instead of relying upon a vacuum chamber, air pressure exerts its force upon a column of mercury.
How do you read a barometer?
With an aneroid barometer, what's of greatest interest is directional movements of the pressure-reading needle from a reference point. In other words, having set the reference pointer, observing a fall or a rise in pressure is what gives an indication of impending changes in the weather.
