Sensor for detecting the angular position of a rotatable member

The present invention relates to a system and method for sensing the angular position of a rotatable member. The system and method employ the use of a composite rotatable member (10) comprising a solidifiable material (22) and a magnetically attractable particulate material (24). The rotatable member has a major body portion and at least one magnetically detectable reference point (14a). The reference point has a first magnetic property and the major body portion has a second magnetic property, different from the first magnetic property. A magnetic property sensor (30) is fixed relative to the rotatable member to detect the passage of the reference point within the rotatable member.