Lean Initiative Enables U.S. Manufacturer to Stay Competitive, and Stay Onshore

The purpose of this white paper is to share the details and knowledge that engineers at Douglas Electrical have gained over the years regarding the specification and sourcing of hermetic seals and feedthroughs used in space simulation vacuum chamber applications. Having worked with most major space simulation facilities over the years, it is our hope that by sharing these observations, vacuum chamber test engineers both experienced and inexperienced will have an easier time solving the typical problems that can occur in feedthrough applications.

From our experience, there are six major areas of concern that factor into the specification and procurement of hermetic feedthroughs. These include: signal loss; signal density; material selection; the need for highly customized solutions; retrofitting older vacuum chambers; and provisioning for bench testing. As I recently heard while at a NASA facility, in all of these challenges, "The devil is in the details." Let's start by looking at some of the “details” and concerns around signal loss.

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