Designed to be mounted in-line for high purity applications, these sterile-design visual flow indicators provide operators with a clear view of flow of virtually any process pipeline fluid or powder. They feature an internal-flush style that meets FDA and 3A specifications, based on a unique O-ring seal design that minimizes traps where bacteria can buildup. Polished stainless steel connections include sanitary clamp as standard, with butt weld and flange as special order items.