iMWS + CWPTA: Wheel Speed Sensors
CWPTA Wheel Sensor as precise velocity aiding sensor for challenging INS/GNSS surveying and control tasks

iMWS + CWPTA: Wheel Speed Sensors

Magnetic Wheel Speed Sensor and Converter

With iMWS iMAR provides a magnetic strip based wheel sensor for sim­ple measurement of the velocity of a land vehicle (car, truck). The sen­sor operates with a magnetic strip glued inside of the rim (use a non-driven wheel!) and a special detector (iRS) mounted on the inside of the wheel, i.e. the disk of the wheel suspension, brake cover or brake caliper holder. Details are shown in the installation hints deliv­ered with the system.

The iMWS-V2 consists of three parts: The magnetic strip, the mag­netic sensor head iRS and the signal converter to pro­vide A/B outputs. In comparision to the iMWS-V1, the iMWS-V2 is capable to measure velocities from 250 km/hr down to zero (!) velocity with an increased resolution (the iMWS-V1 had a lower velocity limitation to approx. 0.3 km/hr and 2.5 times worse resolution).


With the CWPTA iMAR provides furthermore a high precision wheel sensor with resolution in the millimeter range and unmatched linearity of better than 0.01 %. It is mounted on the outside of the wheel and it is approved to be used on public roads too (see application note).

Further informations:

Datasheet iMWS and Converter Box

Application Note for CWPTA Wheel Sensor

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