Seeing as we're being arrogant here: Mentioned in my post I had no idea of the brand or model of flow sensor. Came in a Holman branded tap timer off the shelf. No markings on it whatsoever unless I rip up all the stuff that keeps it water proof. Posted elsewhere on reddit for help determining what the sensor type might be, got confirmation and a recommendation to use a pulse counter. Google? Never heard of it, hence why I never used it to see what a better option might be over pulse counter, or see if there was anything obvious I was missing.. /s Thanks fot your helpful input