SS351AT/SS451A Omnipolar Position Sensors Honeywell Sensing & Control SS351AT/SS451A Omnipolar Position Sensors are small, sensitive, versatile sensors that are operated by the magnetic field from a permanent magnet or an electromagnet. These Hall-effect digital position sensors are designed to respond to either a north pole or a south pole. They have a typical operating point of 85G at 25°C. Honeywell Sensing & Control SS351AT/SS451A Omnipolar Position Sensors are available in two package styles: the SS351AT in the subminiature SOT-23 SMT, and the SS451A in the leaded, flat TO-92-style package. These omnipolar sensors are flexible and designed to meet a wide range of applications.