BENDIX SD-13-4860 Manuel D’Utilisation

®

The sensor's magnet and pole piece form a magnetic field.
As an exciter tooth passes by the sensor, the magnetic field
is altered, which generates AC voltage in the sensor coil.
Each time an exciter tooth and its adjacent space move
past the tip of the sensor, an AC voltage "cycle" is generated.

The WS-24

™

 wheel speed sensor is an electromagnetic

device used to obtain vehicle speed information for an
antilock controller.  When the wheel rotates, the sensor and
an exciter ring (sometimes called a “rotor” or “tone” wheel)
generate a simple AC signal.  This signal is sent to the
controller, which analyzes the data and commands the
antilock system accordingly.

Specifically, the speed sensor consists of a coil, pole piece,
and magnet.  The exciter is a steel ring or gear-like device
that has regularly spaced high and low spots called "teeth."
The sensor is mounted in a fixed position, while the exciter
is installed on a rotating member so that its "teeth" move, in
close proximity, past the tip of the sensor.

The WS-24

™

 sensor is available in both straight and right

angle versions, to accommodate axle/wheel space
limitations.  (See Figure 1.)

The WS-24

™

 sensor fit and function is

compatible with all previous Bendix models.

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