Indicators provide operators with a clear view of virtually any process pipeline fluid or powder. They feature an internal-flush style that meets FDA and 3-A specification, based on a unique O-ring seal design that minimizes traps where bacteria can build up. Polished stainless steel connections include sanitary clamp as standard, with butt weld and flange also available. Units are available in tube OD sizes from 1/2 to 4 inches with standard lengths from 2 3/4 inches to 6 inches, depending on OD, and ratings to 150 psig. Standard material of construction is 316L stainless steel with full material traceability.