Bliss Flanged Sight Flow Indicators offer a simple, direct way to observe the flow of liquids or gases in process pipelines. Designed with double windows and robust construction, they provide operators with immediate, reliable confirmation of flow conditions—something electronic sensors cannot always ensure. By combining clear visibility, rugged materials, and versatile installation options, Bliss flanged indicators deliver superior performance across industries such as oil & gas, petrochemicals, power, water treatment, and pharmaceuticals.