Method and device for supplying inert gas for an additive manufacturing chamber

Abstract

A supplemental system for sensing oxygen concentration in a chamber of an additive manufacturing system and providing additional inerting gas. The supplemental system may be independently controlled from an OEM / primary system and is preferably capable of accurately sensing oxygen concentrations as low as 100ppm. The supplemental system may use a sampling circuit, a sampling pump, and an oxygen sensor external to the chamber to measure oxygen concentration. Conduits for the sampling circuit and inerting gas in the supplemental system may use existing openings in the chamber.

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