Modular

The Modular Distance Sensor is wired between your vehicle's speed sensor and the RAC. It provides 1 foot per mile accuracy and is easier to install than the magnetic sensor. However, it is not compatible with some vehicles.

Magnetic

The Magnetic Distance Sensor uses the oldest technology of all the sensors, but when properly installed, remains the most accurate. While the installation of this sensor is the most intensive of the three sensor types, there are no vehicle compatibility issues.

DISTANCE SENSORS

Distance sensors do the behind-the-scenes work of the RAC distance measuring instruments. These sensors read and modify the data coming from your vehicle and send a signal to the RAC telling it when to count distance. There are currently three types of distance sensors that can be used to do distance measuring:

Internal GPS -  The only one of the sensors that's built right into the RAC, the RAC Geo II contains an internal GPS sensor.

 

External Modular -  The Modular Distance Sensor is wired between your vehicle's speed sensor and the RAC. It provides 1 foot per mile accuracy and is easier to install than the magnetic sensor. However, it is not compatible with some vehicles.

 

External Magnetic - The Magnetic Distance Sensor uses the oldest technology of all the sensors, but when properly installed, remains the most accurate. While the installation of this sensor is the most intensive of the three sensor types, there are no vehicle compatibility issues.