CSR Wheelspeed Sensors no longer available

[David aka Blue7]

I have just heard that CC no longer supply wheelspeed sensors for the original CSR and all that is available is the sensor 2017 onwards and it seems that it is a similar situation with Redline.  I actually bought one as a spare back in 2018 thinking it was a direct replacement for my CSR but on looking closely the sensor looks quite different.

I don’t have a problem at present but thinking ahead, has anyone successfully fitted the 2017 sensor or modified it to work on a CSR?

The 2017 sensor is shown here ... out of stock of course

David

[Alan Reeves]

david if you run the same system, big ring and sensor, one would have thought they would be the same sensor part ?

mmm

[Geoff Brown]

Surely the sensor will be OK. Mounting, wiring & connector may be an issue ?

The important thing is the reluctor ring, the sensor 'counting' the teeth as it rotates expressing this into a signal for the speedometer.

Or is it more complicated an issue than that.

[David aka Blue7]

I haven't actually tried it so it may work but it looks different in that the end of the sensor is set much further back in it's housing.  I just wondered if anyone had fitted it as a replacement and if so did it function ok and did the mounting require any modification.

[ScottR400D]

Is the CSR different to the De Dion sensor, CAT-SP-0038AK? (Which of course is OOS but can be found elsewhere). 

[Jonathan Kay]

There's something about the source of the sensor in the archives. I'll try and find it when I get home.

Does anyone know the answer about which Sevens use the same sensors... that might become relevant.

Jonathan

[David aka Blue7]

Here is a photo of the two, the De Dion on the left has a part no. CAT-SP-0038AK and the CSR  sensor on the right had a part no. EMP40-1.  My impression is that the De Dion on the left would fit a narrower mounting and is supplied with a larger diameter mounting adaptor (shown above the sensor) into which it screws.  I just wanted to know if any CSR owners had fitted it successfully?

[Wrightpayne]

Have you read this thread - seems to have details of the manufacturer and alternate part no.

https://www.caterhamlotus7.club/forum/techtalk/speed-sensor-0

[David aka Blue7]

Thanks for the link to that discussion, I hadn't thought of looking at the part no. on the sensor and with the aid of a magnifying glass my part no. is slightly different XS508B1NAL2

The photo links no longer work and just show union jacks but I have made a note of the manufacturer Telemecanique.  A Google for the part leads to a company in Leeds Farnell and what look like the sensors with M8 width but they would need to be cut to length and connected to a suitable junction box.

A Google for my part no. finds them on Amazon at an eye watering price and at a better price at BPX Leicester

Thanks for the info, I have made a note of it

[Wrightpayne]

BPX have a pdf data sheet on their website for the part - maybe worth saving / printing a copy as seems to contain a lot of useful specification information.

Just up the road from me and where the MiL used to teach at the Primary School!
 

Ian

[Alan Reeves]

A call to Tony in CC parts will solve but my gut feeling is that all late cars have the same speedo sensor set up

and the latest one is very different but is a swop.

[CSR Phill]

I have fitted the new sensor to my CSR and with a bit of 'engineering' it does fit. It didn't solve my speedo problem [which reads zero all the time] but it does fit and pulses away fine with a 0.7mm gap. I sent the head unit to Speedy Cables who said it was duff, charged me almost the cost of a new one, returned it and it is still the same. Why are Caterham speedos so prone to failure?