Hall effect sensors may also be used, on a flapper valve, or vane, to sense the position of the vane, as displaced by fluid flow.
Scapa Flow | Sensor | Active pixel sensor | sensor | Mas Flow 2 | Mas Flow | Hall effect sensor | Nu Flow | Flow network | Flow Country | flow | Volumetric flow rate | Stokes flow | Mas Flow: Los Benjamins | Laminar flow | Hustle & Flow | Flow My Firetear | Flow measurement | Even Flow | Energy flow | An Endress+Hausser electromagnetic flow meter | Where the Rivers Flow North | Surveillance Towed Array Sensor System | Real Time Media Flow Protocol | Piezoelectric sensor | Mass flow sensor | laminar flow | Knudsen flow | Information flow | Inductive sensor |