Aneroid Barometer

Aneroid barometer is a device used for measuring the atmospheric pressure. It shows the current status. Its principle is based on the deformation of the vacuum vessel (chamber called an aneroid, which means "without liquid" - early barometers used a column of liquid such as water or the liquid metal mercury suspended by a vacuum). The deformation is transmitted through the spring and the rocker shaft, which is associated with a needle. The needle on the dial card indicates the actual pressure value. The scale is calibrated in hectopascals (hPa).