Defense Research Technologies, Inc.

Stephen A Freimanis

Tadeusz M Drzewiecki

R Michael Phillippi

A continuous oxygen content monitor has a reference electrode embedded in a powdered chrome-chrome-oxide mixture and a counter electrode embedded in an elongate alumina-graphite sleeve which acts as the probe support body. Two hallow and spacer ablative steel domes encase the reference electrode and an intermediate air gap spacing and provide insulation to prevent thermal shock from damaging the monitor during insertion into the metal melt. A circuit provides counter emf across the sensing electrodes to prevent ion depletion of the reference material.

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Germantown, MD, United States of America

Stephen A Freimanis