Dual diaphragm differential pressure transducer

Abstract From the Canadian patent

Abstract of the Disclosure, A corrosion proof differential pressure transducer includes a central disk and two thin diaphragms mounted close to but spaced from the disk on both sides thereof with the diaphragms being intercoupled to move together. This may be accomplished for example, by a rod passing, through a hole in the center of the central disk which is secured to each of the diaphragms; or by a fluid such as silicone oil in the space between the diaphragms and flowing through one or more holes through the central disk. At least one of the diaphragms, the central disk and the rod (where one is used) are formed of alumina quartz, or other inert, insulating material having substantially …