piece 60 has on the magnetic field lines 62 and how the x axis tilt effects are mitigated by the present invention as can be seen the magnetic field lines 62 are elongated and directed toward the dense preferred x axis fig1 is a graph that illustrates jitter performance for an encoder wheel sensor system for varying amounts of offset or axial displacement the jitter performance graph provides for two different conditions one for the magnetic field sensing element without a pole piece 100 and one for the magnetic field sensing element with a pole piece 102 as can be seen by the two graphs the pole piece provides for a significant improvement in jitter performance when the sensor is in its optimal location no offset as well as at all amounts of offset in fact as the amount of offset or axial displacement increases the amount of improvement over the no pole solution increases wherein at a displacement of u00b1 2 mm the jitter performance is approximately 3 4 u00d7 better with the through pole 60 than without it in the embodiments discussed supra and illustrated for example in fig9 a and 9 b the pole piece 60 was affixed or positioned external and adjacent to the magnetic sensing element that resides within an integrated circuit package alternatively a pole piece or other type magnetic flux influencing element may reside within the integrated circuit package for example as illustrated in fig1 an integrated circuit package 110.