In a plant cooling water system, I noticed some recurring mismatches in flow readings between different points that didn’t match expected hydraulic behavior. Turns out, partially clogged strainers ahead of some sensors were causing distorted signals—flow looked way lower than actual. After cleaning those strainers and recalibrating sensors, the flow data aligned much better with what the pumps and valves indicated. It was a good reminder that maintaining sensor cleanliness and verifying upstream conditions can save a lot of confusion in flow monitoring. Anyone else had to dig into mechanical fouling before suspecting sensor or transmitter issues?