Absolute pressure capsules are evacuated cans, for use in aneroid barometers and altimeters. The spring action of the diaphragms and the capsule of the external air pressure are in equilibrium. A change in air pressure thus causes a corresponding change in the height of the can. The change in can height is transmitted to the display of a barometer or altimeter via a pointer mechanism. If the stroke is not sufficient, several absolute pressure cans can be assembled to a can set.
We supply absolute pressure capsules and capsule sets in various diameters and strokes and, on request, with silver-colored vapor deposition. We also manufacture temperature-compensated capsule sets for use in weather stations.