www.foodengineeringmag.com/articles/86346-contact-free-position-sensors
Contact-free position sensors
November 4, 2007

Macro Sensors’ RS 1500-120 series of fractional-turn, contactless, rotary position sensors measure the angular displacement of rotating elements such as quarter-turn ball and butterfly valves, airflow dampers and diverter gates used in packaging machinery. IEC IP-66 environmental-rated, the units have shafts that can rotate a full 360° and rotary position sensors that utilize contactless inductive technology to measure shaft angle position over a nominal range of 120°.
Macro Sensors; 856-662-8000;
www.macrosensors.com