Accurate, reliable, and easy to operate, our RAC units are the industry-standard Distance Measuring Instruments (DMI). For over 30 years, our JAMAR RAC models have been widely used by public works departments, DOTs, utility workers, railroad inspectors, paving companies, and more. These cost-effective units save time and money by allowing personnel to measure distance while driving, accurate up to 1 foot per mile.
Distance Measuring Instruments (DMI)
GPS Distance Measuring Instrument
On-board GPS distance measuring, coordinates, and data memory.
No Calibration. No Installation. No External Sensor required.
As a GPS distance measuring instrument, the RAC GEO IV can accurately record distance and data utilizing GPS satellites or two optional types of external sensors. Call us today for more information about the RAC GEO IV.
External Distance Measuring Instruments Sensors
External Distance sensors read and modify the data coming from your vehicle and send a signal to the DMI, telling it when to count distance. These can be used with many older RAC DMI models, or they can be used in place of the RAC GEO IV’s internal GPS sensor for added accuracy. There are currently two types of distance sensors that can be used:
Magnetic Distance Sensor:
The Magnetic Distance Sensor uses the oldest technology of all the sensors, but when properly installed, it remains the most accurate. This sensor works in any vehicle.
AutoLink OBD:
You plug the AutoLink into the OBD interface on your vehicle, then plug the AutoLink into your RAC’s power port using the provided telephone-style cable. Perform a quick calibration, and that’s it. No getting under the hood, no splicing wires, no tools required.