The SS40A Hall Effect Sensor from Honeywell comes with a thermally balanced integrated circuit and bipolar magnetics for ring magnet applications and built-in reverse polarity protection. Some of its applications include brushless DC motor commutation, magnetic encoding, speed and RPM sensor, disc speed, tape rotation and flow-rate sensing. Hall effect sensors operate as analog transducers and return voltage directly when they are triggered by a magnetic field and. They vary their output voltage in response to a magnetic field.

Compact in size, this hall effect sensor consumes less power of only 5 mA maximum at 4.5 Vdc and delivers energy efficiency and reliable performance. It has an operating temperature range between -40 °C to 150 °C.