Externally adjustable magnetic target setting

A control valve assembly comprising:

• a valve shaft extending along a longitudinal axis, the valve shaft having a first end and a longitudinally-opposite second end;
• a flow control element coupled to a first portion of the valve shaft;
• a valve body having an inlet, an outlet, and a valve seat disposed between the inlet and the outlet;
• a valve actuator coupled to the valve shaft, the valve actuator adapted to rotate the valve shaft about the longitudinal axis such that the flow control element rotates from a closed position in which the flow control element sealingly engages the valve seat to an open position in which the flow control element is disengaged from the valve seat;
• an enclosure coupled to the valve body, the enclosure having a plurality of walls that cooperate to define a sealed interior portion, wherein a second portion of the valve shaft is disposed within the interior portion of the enclosure;
• a first detection member disposed with the interior portion of the enclosure;
• a target support coupled to a third portion of the valve shaft, wherein the target support is disposed outside of the interior portion of the enclosure;
• and
• a first target coupled to the target support,
• wherein in a first shaft position, the first target is adapted to be within a detection range of the first detection member, and in a second shaft position rotationally offset from the first shaft position, the first target is adapted to be outside of the detection range of the first detection member.