In the field recently, I noticed an intermittent issue with flow sensor signals feeding a key valve control loop on a water treatment skid. The control valve was oscillating slightly without any real change in flow, causing unnecessary actuator wear and process upsets. After digging in, it turned out that EMI from a nearby variable frequency device’s power cables was inducing noise on the sensor wiring. Shielding and proper grounding improvements on the sensor cable helped stabilize the signal and smooth the valve operation. This got me thinking about how often control quality suffers quietly from subtle signal integrity issues rather than outright instrument failures. Has anyone else encountered similar cases where improving wiring layout or using better shielding noticeably improved flow sensor readings or control responsiveness? What practical steps did you find most helpful in busy plant environments where cables run close to heavy electrical gear?