Dow Global Technolgoies LLC

Paul J Cammarata

James David Tate

R Spencer Behling

A probe body () in a optical probe () including a measurement tube () having a plurality of probe vents () adapted to allow process fluid to flow there through; two or more purge rings, each including a process window, a purge gas inlet, and a plurality of purge gas outlet openings adapted to direct purge gas toward or adjacent to the process window; and a measurement region defined by a portion of the measurement tube and two or more of the purge rings.

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Freeport, TX, United States of America

Paul J Cammarata