Hall Effect Sensors are devices which are activated by an external magnetic field. We know that a magnetic field has two important characteristics flux density, (B) and polarity (North and South Poles). The output signal from a Hall effect sensor is the function of magnetic field density around the device.

Is Hall effect sensor passive?

Both are controlled and activated by means of an external magnetic field – however a Hall effect sensor still requires an electrical circuit to operate, which needs power even when the sensor is in a passive state as its construction principle is based on the provision of an output signal.

What type of sensor is a Hall effect?

Hall effect sensors are non-contact, which means that they do not have to come in contact with a physical element. They can produce either a digital (on and off) or analog (continuous) signal depending on their design and intended function. Hall effect switches and latches are either on or off.