Haltech S4 Hall Effect Sensor - Manual (Page 4)

Typical set -ups - S3
4 cylinder / 2 rotor engine
For a four cylinder 2 magnets are required in total, positioned exactly 180° apart.
Figure 1: Typical 4 cylinder/ 2 rotor application
6 Cylinder / 3 Rotor Engine
For a six cylinder 3 magnets are required in total, positioned exactly 120° apart.
Figure 2: Typical 6 cylinder/ 3 rotor application
practice the magnets are often mounted within the circumference of the
wheel and the sensor is mounted so that its base is pointed towards the
magnets in the face of the wheel.
Note: In the following examples, for ease of reference, the magnets are
shown mounted on the circumference of a wheel with the Haltech Hall
effect sensor oriented to one side. If so mounted the magnets need to
be mounted with sufficient strength to resist centrifugal force. In