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