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12/17/12 TECH-440/D.W.O. 23135 Page 7 of 55
1.4 Special Features
Non-Contact Position Feedback
To provide consistently accurate performance information, all linkages, levers
and connecting rods, from the positioner to the control valve have been
eliminated from the design. Valve position sensing is performed totally by non-
contact means based upon characterization of magnetic flux strength as a
function of position.