Hall Effect Sensors are sometimes referred to as “switches” rather than sensors because of the on-off “digital” voltage signal they produce. Unlike magnetic sensors that produce an alternating current (AC) signal which varies in voltage with speed, Hall Effec - tSensors produce a constant voltage signal that can change abruptly from maximum voltage to nearly zero and back again regardless of engine speed. This produces a square wave output signal that can be easily used by the onboard computer for timing purposes.
How does it works?
A Hall IC switch is OFF with no magnetic field and ON in the presence of a magnetic field, as seen in above diagram.
1. The Earth's field will not operate a Hall IC Switch, but a common refrigerator magnet will provide sufficient strength
to actuate the sensor.
In Hall Effect Sensor There are Three Types
• UNIPOLAR - WSH130NL
• BIPOLAR - WSH 130
• LINEAR - WSH 49E