Aneroid barometer was discovered by a French inventor Lucien Vidie in the year 1843. This particular pressure measuring instrument consists of a thin elastic disk covering a chamber that contains a partial vacuum. This works as follows: the high atmospheric pressure pushes against the disk and causes it to bulge inward, while low pressure does not push as hard, which allows the disk to bulge outward. This type is smaller and more portable as compared to a mercury barometer. An aneroid barometer when used with a barograph, can record up to a week's worth of data. These are used extensively in aviation as part of altimeters.
