Hall Effect Sensor, Unipolar, 20 mA, TO-92, 3 Pins, 3.8 V, 30 V

Unipolar Hall Effect Sensor

Unipolar Hall Effect Sensor 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-Effect Sensors 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:
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