What are the tools for measuring atmospheric pressure?

An instrument for measuring atmospheric pressure is called a barometer. Common atmospheric pressure instruments are mercury barometer and empty box barometer. Mercury barometer has high accuracy, but it is not easy to carry, and it is mostly used for experimental measurement. Empty boxes are easy to carry, but not as accurate as mercury, and are mostly used for mountaineering surveys.

barometric pressure

Experiments in the Madeborg hemisphere proved the existence of atmospheric pressure. Pressure refers to the atmospheric pressure acting on the unit area, that is, it is numerically equal to the gravity of the vertical air column extending upward to the upper limit of the atmosphere on the unit area. Air pressure varies not only with height, but also with temperature. The change of air pressure is closely related to the change of weather.

Barometer principle

The principle of barometer refers to the design principle of barometer. The height of mercury in barometer is determined by atmospheric pressure. The higher the mercury column, the greater the atmospheric pressure.

The empty box barometer takes the empty box group that moves axially with the change of atmospheric pressure as the sensing element, and it drives the pointer to indicate the atmospheric pressure value at that time through the pull rod and transmission mechanism.