Barograph is a Weather Instrument that is used for recording the atmospheric pressure. It is a recording aneroid barometer. The reading of the barometric pressure over time is produced on a paper or a foil chart, which is known as a barogram.

The working of the Barograph is very scientific that indicates the atmospheric pressure. The output is presented through a continuous graph on paper or foils. The Barograph has a metal cylinder, which is linked with a pen arm. The pen arm is directly proportional the changing atmospheric pressure that enables the meteorologists to study the forthcoming climate. Pressure versus time is traced by the pen and is recorded on the chart, which is rotated by clockwork.

The barograph is used both on the ships as well as on the land. Today they come in various shapes and sizes from small ones to the very large ones. To give it a fancy look the barographs even come in glass boxes. The drawer below collects the barogram. The barograph generally provides a reading of a week.

The pressure of the atmosphere changes with height. Thus the barographs are used in the flights to measure the elevation level. These days the advancement of technologies has enabled computer methods to record the atmospheric pressure or the barometric pressure.

There are three types of barographs:

• Sailplane Barograph
• Capsule Pile and Linkage Barograph

Stationary Barograph

The barographs are not only used by the meteorological departments but also in the ships and flights for detecting the atmospheric pressure.