wrong pas sensor

billyboya

Esteemed Pedelecer
Aug 10, 2016
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uk
Hi all

I ordered a pas sensor with the orange 3 pin connecter juliet I think it's called , but got sent a SM black plug type

s-l1600 (1).jpg

2025-08-08_131056.jpg


This is the one i need above


It cost £7.92 but now seller says how about a £4 refund and a 8% voucher. I am so angry as I said to him no as I paid £7.92 why cant he just send the correct type, then i can send his SM one back its simple enough.
 

guerney

Esteemed Pedelecer
Sep 7, 2021
12,231
3,410
Did you buy it via ebay? If so, open a dispute by starting a return. If he doesn't agree to give you a full refund for a return within a few days, you can ask ebay to step in. They nearly always rule in favour of the buyer. In such situations I've always received a full refund, very often without having to return the item.

EDIT: You did buy it via ebay, it's on your other thread - you're doing it again, starting new threads about the same thing billyboya. It's easier for the hub motor expert dudes to help you, if you stick to one thread about the same issue.

https://www.pedelecs.co.uk/forum/threads/pedal-assist-disc-help-plus-received-wrong-sensor.48986/post-749662
 
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billyboya

Esteemed Pedelecer
Aug 10, 2016
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102
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Did you buy it via ebay? If so, open a dispute by starting a return. If he doesn't agree to give you a full refund for a return within a few days, you can ask ebay to step in. They nearly always rule in favour of the buyer. In such situations I've always received a full refund, very often without having to return the item.

EDIT: You did buy it via ebay, it's on your other thread - you're doing it again, starting new threads about the same thing billyboya. It's easier for the hub motor expert dudes to help you, if you stick to one thread about the same issue.

https://www.pedelecs.co.uk/forum/threads/pedal-assist-disc-help-plus-received-wrong-sensor.48986/post-749662

Hi sorry about the thread, its just that I never got any replies, so thought best to start a new thread. will remember next time. yes got it from ebay, But funny part about it is, he has the part I want, WP-90CM which I asked for, plus also what seems strange, is it says the SM type is out of stock anyway. so why send the SM type. I have asked him to send the WP-90CM type orange plug. then can he tell me how to return wrong type one. But all I got from him today was, him saying about giving me a £4 credit plus 8% voucher, WTF do I need all that I just want the correct one. will wait until tomorrow see what he says if no deal then will get a full refund and go elsewhere
 

billyboya

Esteemed Pedelecer
Aug 10, 2016
1,193
102
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Can anyone here advise what’s best PAS sensor for a 36v battery. I’ve got a 12 magnet one now and was gonna try a 6 magnet one. Does less magnets work better or not
 

Nealh

Esteemed Pedelecer
Aug 7, 2014
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It is hard to follow what you get up to or are trying to arrive at.
In the other thread you mention PAS LED not working then say you forgot to fit the magnet disc, then you go on about having a six pole PAS.

Have you more then one bike you are trying to get to work ?
 

billyboya

Esteemed Pedelecer
Aug 10, 2016
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uk
It is hard to follow what you get up to or are trying to arrive at.
In the other thread you mention PAS LED not working then say you forgot to fit the magnet disc, then you go on about having a six pole PAS.

Have you more then one bike you are trying to get to work ?
No sorry it was confusing what I said in other post. Ok let’s start again, atm I have a 12 magnet PAS which has been playing up. Like sometimes on any level the motor wont kick in. Then if I say move it closer to sensor then it’s ok again it just seems it works on and off. So that’s why I have ordered a different type with 6 magnets not like what I have now this one


but now have ordered this type a 6 magnets not like the one above and I only have the one bike

oh and the question I was saying earlier about no sensor light as it was because I hadn’t put the disc on lol it’s just that I was trying to clean up old PAS magnets whilst I was waiting for new 6 magnet one to arrive but seller had sent me the black lead connector SM but I wanted the WP-90CM one orange connector Juliet I believe it’s called

Hope now all this makes sense

 

thelarkbox

Esteemed Pedelecer
Aug 23, 2023
1,675
520
oxon
?? The Sensor pictured in Post#1 is all in one no magnet disk needed, this design has the magnets internal so is not subject to the same issues of magnet spacing as the 2 part jobs, and it probably has no led to flash either..

When fitting just be mindful the whole sensor does NOT rotate with the pedals/crank Only its inner section, If the whole thing rotates and is only restrained by its flex you will suffer inconsistent motor start up and stops.

I think its an ebike-myth that 12x magnet sensors cause problems, probably because most are 12x magnet sensors and so problems with the type stick in forum followers memories???

RE ebay +1 to the above advice to raise an issue and chase a full refund to spend on the right option (again)
 

billyboya

Esteemed Pedelecer
Aug 10, 2016
1,193
102
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?? The Sensor pictured in Post#1 is all in one no magnet disk needed, this design has the magnets internal so is not subject to the same issues of magnet spacing as the 2 part jobs, and it probably has no led to flash either..

When fitting just be mindful the whole sensor does NOT rotate with the pedals/crank Only its inner section, If the whole thing rotates and is only restrained by its flex you will suffer inconsistent motor start up and stops.

I think its an ebike-myth that 12x magnet sensors cause problems, probably because most are 12x magnet sensors and so problems with the type stick in forum followers memories???

RE ebay +1 to the above advice to raise an issue and chase a full refund to spend on the right option (again)
Hi yes picture in post#1 is all in one, which i ordered on ebay but seller sent the SM type black plug instead of the WP-90CM orange plug type. I am getting messed about with the seller, so have now applied for a full refund, and soon as I get refund i will return the pas wrong type back to him.

I have now also looked on Amazon found one but is a 12 magnet one, but its ok as the one i have now a disc type with seperate sensor, is 12 magnets, but it seems to keep moving away on crank shaft spindle from sensor. don't know why, as the centre isnt broke.

This 1 from Amazon is a bit more than one on ebay which was £7.92, but this one is £8.99, when i went to pay Amazon added another £4.99 PP but i notice they offering prime free for 30 days so applied for that so now no PP also its arriving tomorrow that's even better

https://www.amazon.co.uk/dp/B0D1R3YC37?ref=ppx_yo2ov_dt_b_fed_asin_title
 

saneagle

Esteemed Pedelecer
Oct 10, 2010
9,451
4,208
Telford
All sensors work with all controllers.

12 magnet ones have the complication that some of them are handed, so, for them, you have to install them on the correct side of the bike. If you order a 12 magnet one, you have to check whether it's handed and which side of the bike it goes before ordering. This only relates to the type with a separate magnet disc.

The integrated ones go on the left side of the bike. Make sure you have enough room for one. You can make more room by grinding up to 3mm off the inside of the pedal arm. For these, it makes no difference how many magnets they have.
 

Nealh

Esteemed Pedelecer
Aug 7, 2014
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The reason the original PAS was /is intimitent is because the disc is moving or slipping on the axle , and either the gap is too large or the slipping disc isn't producing a proper steady field signal for the sensor to pick up.
When one doesn't see the LED blink on/off , it is because the signal isn't being picked up so check either the gap or disc securement on the axle.

Typically the small plastic spline compress ove rtime and lose thier grip on the axle, it is one reason why I never use them .

To prevent disc slip or movement on the axle wind some electrical tape or Amalgam tape around the axle then carefully push /fit the disc ove rsaid tape to aid a firmer grip ( Only one or two wraps of tape should be needed).
 

Nealh

Esteemed Pedelecer
Aug 7, 2014
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West Sx RH
Those of us in the know or have more experience with them will always prefer a RHS PAS and secure the disc firmly to the inner side of the chain ring so it can't move at all except with crank rotation, then it is 100% efficient and never have to do anything else to them.
I use the small chain ring to bolt a pas disc to using the chain ring PCD bolts, othea roptions are to glue them in position with aresin type glue.

Splined discs are always liable to move or lose grip over time , LHS ones are also more likely to be knocked or damaged as they ahve little to protect them.
 

Nealh

Esteemed Pedelecer
Aug 7, 2014
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With your wrong PAS one can simply cut off the plugs and solder the wires to each other and shrink the joint to insulate. Red to Red, Blk to Blk and other colour to each other.
 

billyboya

Esteemed Pedelecer
Aug 10, 2016
1,193
102
73
uk
The reason the original PAS was /is intimitent is because the disc is moving or slipping on the axle , and either the gap is too large or the slipping disc isn't producing a proper steady field signal for the sensor to pick up.
When one doesn't see the LED blink on/off , it is because the signal isn't being picked up so check either the gap or disc securement on the axle.

Typically the small plastic spline compress ove rtime and lose thier grip on the axle, it is one reason why I never use them .

To prevent disc slip or movement on the axle wind some electrical tape or Amalgam tape around the axle then carefully push /fit the disc ove rsaid tape to aid a firmer grip ( Only one or two wraps of tape should be needed).
That's a good idea about wrapping some Amalgam tape I think you meant Amalgamating Im sure i have some of that. will give it a go. at least the new PAS sensor is arriving tomoz, as on ebay I waited over 2 weeks for one only to be sent wrong type