Monit rally computers measure distance and speed by counting the pulses received from a Vehicle Speed Sensor (VSS). Depending on the type of vehicle, there are some options for obtaining a suitable signal.
The ABS interface takes the signal produced by an ABS Wheel Speed Sensor and converts it into a format that can be used to operate a Monit Rally Computer. It will work with most types of two wire sensors that generate an analogue output signal.
Please note that this sensor can only be used if the ABS sensor is not being used by the braking system and has been disconnected.