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what is a barometer used for

A barometer is a widely used weather instrument that measures atmospheric pressure (also known as air pressure or barometric pressure) -- the weight of the air in the atmosphere. mercury barometer Mercury barometer. Because atmospheric pressure changes with distance above or below sea level, a barometer can also be used to measure altitude. Many measurements of air pressure are used within surface weather analysis to help find surface troughs, … A barometer’s main use, however, is not to measure altitude, but to measure the actual changes in the pressure of air at a particular place. There are two main types of barometers: mercury and aneroid. Barometer, device used to measure atmospheric pressure.

It is one of the basic sensors included in weather stations. A barometer is a scientific instrument used in meteorology to measure atmospheric pressure. Pressure tendency can forecast short term changes in the weather. The barometer is the most important instrument used in interpreting and forecasting the weather, but surprisingly few people are completely certain about how to use a barometer.