The Double Window Sight Glass with Flapper is designed for reliable visual monitoring of fluid flow in industrial pipelines and process systems. Its dual-window construction provides clear visibility of the process medium, while the internal flapper mechanism helps indicate the presence and direction of flow.

The flapper moves in response to fluid flow, providing a simple visual indication of flow conditions without requiring external power or instrumentation. Robust construction and high-quality viewing windows make the sight glass suitable for demanding industrial applications involving liquids and compatible process fluids.