The SS345PT and SS445P from Honeywell Sensing and Control, Minneapolis, MN, are unipolar Hall effect digital position sensors with built-in pull-up resistors. The SS345PT responds to a single North pole while the SS445P responds to a single South pole; the open collector output with built-in pull-up resistor interfaces with common electronic circuits. Enhanced sensitivity lets the sensors work with smaller and less-expensive magnets. Designed for high-volume, cost-sensitive position and motion sensing applications, the sensors can be used for commercial, industrial, and medical applications and are supplied on tape and reel (SS345PT) or in bulk packaging (SS445P).
Honeywell Sensing and Control