Aneroid capsule pressure gauge - has central plate between corrugated membranes and distortion is measured by capacitance change

摘要

A pressure gauge based on the use of an aneroid capsule (20) is particularly for use in radiosondes. The inter displacement of the membranes (21, 22) of the aneroid capsule (20) is transformed into a capacitive quantity. There is, between membranes (21, 22) of the aneroid capsule (20), an insulator substrate (10), preferably of the shape of a disc or plate; wherein the capacitance is created between opposite membranes (21, 22) of aneroid capsule (20) separated from each other by insulator substrate (10).