Image Credit: Nor-Cal Products, Inc. Electrical feedthroughs transmit electrical current through the walls of a pressurized or vacuum system through a hermetic seal. Electrical feedthroughs are ...

A fiber optics feedthrough has high electrical resistance and is not affected by electromagnetic ... coated optical fibers which are brazed to a stainless steel tube to make a vacuum tight seal and ...

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Vacuum tubes fueled a technological revolution ... Two glass components are used, the dome itself, and feedthrough stems that have a wire for each lead passing through a glass disc.