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how does my speedo sensor work?!
john_p_b - 8/4/05 at 06:12 PM

ok random one here but as title, it came with the gauges but the instructions are as vague as they come.

it's a vdo gauge set so obviously a VDO sensor, it's about 3" or 4" in length 3/4" in diameter with some thread near the top of it and 2 terminals on the top of it (one smaller than the other).

would have put a picture up to save that explaination but camera is dead!

anyone used one of these? how does it work? what does it pick up? magnet etc? really am a little stuck with this!

thanks in advance for all your wonderfull help

thanks
john

RogerM - 8/4/05 at 06:22 PM

Sounds like a hall effect sender. Depending on spec you will need either 1 or a number of magnets stuck to the prop or diff flange.

Doesn't VDO have a website???

john_p_b - 8/4/05 at 06:30 PM

yeah they do have a website but to say the least it's next to useless, lists the guages but nothing about senders for them

givemethebighammer - 8/4/05 at 07:19 PM

I bought my VDO gauges from lowtension:

http://www.lowtension.com

very helpful people. I used the univeral sensor with magnets glued around one of my driveshaft flanges, rather than the hall effect one.


fitting instructions here:

http://www.lowtension.com/pdf/performance_%20kit.pdf

carlgeldard - 8/4/05 at 08:02 PM

I posted this about a week ago.

http://www.locostbuilders.co.uk/viewthread.php?tid=24127

I think you have got a inductive sensor I hope this works for you. I know what you mean about the instruction and the speedo

Carl

ReMan - 8/4/05 at 10:09 PM

quote:
Originally posted by john_p_b
ok random one here but as title, it came with the gauges but the instructions are as vague as they come.

it's a vdo gauge set so obviously a VDO sensor, it's about 3" or 4" in length 3/4" in diameter with some thread near the top of it and 2 terminals on the top of it (one smaller than the other).

would have put a picture up to save that explaination but camera is dead!

anyone used one of these? how does it work? what does it pick up? magnet etc? really am a little stuck with this!

thanks in advance for all your wonderfull help

thanks
john


If you really mean How does it work , then does it matter as long as it does, if paired with your clocks it probably will?
Or is there another sublime question, like why does it work?
In which case, thats science!

Peteff - 8/4/05 at 10:58 PM

It will only work if you really believe in it unlike my bl**dy starter motor the other day

john_p_b - 9/4/05 at 09:59 AM

well after mucho internet searching i've concluded it's a inductive sensor and requires 4 magents to work. only issue now is where do i get 4 identical magnets!

flange nut - 9/4/05 at 10:08 AM

Try Ebay for the magnets. There are normally lots for sale, for example.
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&category=1267&item=7506401887&rd=1

clbarclay - 9/4/05 at 10:02 PM

Companys like RS componts sell a wide range of magnets.

Also try
http://cpc.farnell.com/jsp/endecaSearch/searchPage2.jsp?OrgTT=magnet&Nty=1&N=1000085+401&=gensearch&No=0&Ntt=magnet&Ntk=gensea rch&comSearch=true



[Edited on 9/4/05 by clbarclay]