The VH-35 is a mechanical flow switch with a paddle which is displaced by the force of the flowing liquid.
The movement of the paddle displaces a magnet which activates the reed switch.
Mount the flow switch in a horizontal pipe with the hanging paddle in a vertical position and perpendicular
to the flow direction. The shaft, on which the metal paddle hangs, should be positioned at the internal
diameter of the pipe. To achieve this position, the top of the threaded fitting should be at 24 mm (0.96
inch) from the internal diameter of the pipe.