Wheel Speed Sensors - ABS

ABS (Anti-lock Braking System) or Wheel Speed Sensors, are mounted in the hub of the wheels and detect the rotational speed of each of them, transferring this
information to the ABS control unit. If the ABS control unit detects a substantial drop in speed in one or more wheels, which could cause them to lock, it swiftly
intervenes by modulating the braking pressure of each wheel individually. This prevents the wheels from locking and guarantees safe braking, allowing the driver
to retain control of the vehicle.

The ABS sensors provide information not only for the system itself, but also for such other systems as the gearbox, satellite navigation systems, the TCS or ASR
(Traction Control Systems), chassis control systems, the ESP (Electronic Stability Program) system or the incline control system, which likewise make use of it.

Given the constant development of such sensors, there are today various different designs depending on precision, size and robsutness requirements.

FAE divides these sensors into 2 major groups:

Passive ABS sensors. For toothed wheels.
  • Inductive ABS.

Active ABS sensors. For wheels with magnetic coding/toothed wheels.
  • Hall ABS.
  • Hall ABS with magnetic coding ring.
  • Magneto-resistive ABS.