Hydrostatic gauges (including the mercury column manometer) Review pressure towards the hydrostatic drive for each unit location at the base of a column of fluid. Two corrugated diaphragms sealed at their edges to form a capsule, which can be evacuated, are used in aneroid barometers to evaluate atmospheric pressure ( http://milojqner.educationalimpactblog.com/32566852/a-review-of-pressure-gauge