Magnetic / VR sensor for wheel speed

[bdinnerv]

I am looking for a magnetic sensor to use for wheel speeds with an M880 - the car I am putting them on (Sierra Cosworth) has an older Teves ABS system with ATE VR sensors which a) are almost impossible to get these days and b) are a pain with the wiring so I am looking at alternatives.

The trigger discs in the hubs have a fairly small tooth profile - about 1.5mm tooth width, 3-4mm pitch and 2mm depth (see attached image) which I think rules out using a hall effect sensor (unless someone can suggest one that will work with this small tooth profile).

I see there is the 52002 listed on the Motec site however there is no specs document for it to check the required tooth profile - does anyone know what they are? The 2 other magnetic sensors list a tooth gap of greater than 10mm which rules them out in this application.

I have also seen this type of magnetic sensor - https://au.rs-online.com/web/p/magnetic ... s/0304172/ which has an integrated IC to output a digital signal - could this be used instead, also negating the requirement for a DMCD?

[moylee19]

why not grind or machine some teeth out to give a larger spacing, thus allowing the use of a hall effect or any mag sensor.

[bdinnerv]

why not grind or machine some teeth out to give a larger spacing, thus allowing the use of a hall effect or any mag sensor.

That is my last alternative, am trying to see if there is a sensor I can use first before removing metal - these parts are getting harder and harder to find for a car that was pretty much only sold in the UK in pretty limited numbers.

[stevieturbo]

Lots of OEM use fine tooth multi tooth wheels for ABS...probably as handy just to find another OEM sensor ?

ie...sensor and ring ? just adapt the sensor ?

https://www.ebay.co.uk/itm/BMW-3-SERIES ... 2371862273

[Scott@FP]

Keep in mind for wheel speed you want to use a zero RPM sensor if you can, not one that needs XXX RPM to start working.

For hall effect with small teeth, try this one (or a similar modern one), it will handle small teeth-

https://www.mouser.com/ProductDetail/785-SNDH-T4L-G01

[bdinnerv]

For hall effect with small teeth, try this one (or a similar modern one), it will handle small teeth-

https://www.mouser.com/ProductDetail/785-SNDH-T4L-G01

Thanks, the stats seem to be pretty close to what I need so will give one of those a go.