Why Do We Use Liquid Barometer?

The liquid barometer is an instrument ideal for measuring atmospheric pressure. There are three types of barometer available like the aneroid barometer, the electronic barometer and the liquid barometer: all used for measuring atmospheric pressure and weather forecasting. In a liquid barometer, as the name implies; a liquid is used to measure atmospheric changes. A liquid barometer consists of a U-shaped tube with one end closed.

The liquid barometer is synonymous as a mercury barometer. Though any kind of liquid can be used in a liquid barometer, only liquid mercury has that dense quality in it for easy practical usage. Liquid barometers comprising of water or such other liquids with similar density need to have a tube measuring about 10 meters tall in order to get an accurate measure of atmospheric pressure. Water barometers are best used to measure atmospheric pressure for a short period of time. Weather stations and laboratories however, make use of liquid mercury barometers.

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