The Fischer & Porter 820B002U20 Sight Flow Indicator provides direct visual confirmation of fluid flow in a process line, letting operators see whether liquid is moving at a glance. This inline device is mounted in piping to provide a clear sight window for observing flow, supporting quick checks during routine maintenance, valve operation, or process changes. With the 820B002U20 model, it serves as a simple, passive, non-electrical flow indication in industrial settings where an immediate visual cue is beneficial.
