Which hydraulic brake sensors.

[PhiltheFluter]

Hi,
Are all the hydraulic brake sensors similar, or is there something I should be looking for. I've seen these real cheap ones:

Hydraulic Brake Sensor For Bafang BBS02 BBSHD Brake Sensor Replacement Parts | eBay

Find many great new & used options and get the best deals for Hydraulic Brake Sensor For Bafang BBS02 BBSHD Brake Sensor Replacement Parts at the best online prices at eBay! Free delivery for many products!

rover.ebay.com

Will they do the job just as well as pricier ones?
Many thanks for any advice/input.

 

[PhiltheFluter]

Sorry, I should have put this in "conversion kits general discussion".

 

[Woosh]

you need the brake sensor that fits your cabling system.
Typically, the controller is connected to the instruments on the handlebars with a '4 to 1' bus cable. The largest manufacturers of these bus cables are Higo and Julet. The brake sensors for Bafang cannot be used on Julet bus cables and vice versa.
If you use Julet cableset, the brake sensors can be connected via 2-pin red plug/socket or 3-pin yellow plug/socket. You have to use the corresponding sensors.
2-pin system has only signal and ground, they either have mechanical switch (normal sensored brake levers) or reed switch (as in Tektro sensored hydraulic brakes).
3-pin system has 5V, signal and ground. They are for inline hidden brake sensors or Hall brake levers (like those supplied with Bafang BBSes).

 

[PhiltheFluter]

Lovely, thank you Woosh. I have yellow 3 pin. My instructions say I can manage without the sensors, but I fancy adding them anyway.

 

[Nealh]

It's quite pointless fitting two, only one is needed. I prefer to fit it on the rear brake as that is the brake I use most as a holding brake.

 

[PhiltheFluter]

It's quite pointless fitting two, only one is needed. I prefer to fit it on the rear brake as that is the brake I use most as a holding brake.

I hadn't even thought of that, yeah back brake sounds good.
Saves me a little job. Cheers.

 

[Nealh]

The unused brake julet then needs blanking off to prevent moisture ingress with heat shrink.

 

[vfr400]

Even when you get ones with the wrong connector, it's no big deal. You just cut off the connectors and join the wires. Connectors are nothing but a source of problems. They're simply not needed.

 

[KirstinS]

I hadn't even thought of that, yeah back brake sounds good.
Saves me a little job. Cheers.

You haven't mentioned the bike or what riding you do.

tWhilst I totally agree about just one being required but, personally, and as a mountain biker first and foremost I am well used to using my front brake As the main one....and so place it there.

On my hybrid, general commuter bike it it is on the rear. Horses for courses but placement depending on riding style is worth thinking about

 

[PhiltheFluter]

You haven't mentioned the bike or what riding you do.

tWhilst I totally agree about just one being required but, personally, and as a mountain biker first and foremost I am well used to using my front brake As the main one....and so place it there.

On my hybrid, general commuter bike it it is on the rear. Horses for courses but placement depending on riding style is worth thinking about

I still need to check the bike out(I'm in hospital ATM) in the flesh, but I've been given a Cube Aim Pro 29er hardtail hybrid with hydraulic brakes. Most of my riding will be in town, but on towpaths, bridleways, a disused railway line, woods(with good quality paths). In the past I've tended to use the back brake more.

 

[Dali]

Even when you get ones with the wrong connector, it's no big deal. You just cut off the connectors and join the wires. Connectors are nothing but a source of problems. They're simply not needed.

Sorry to hijack this tread, but I did this as the (Bafang I believe now) waterproof hydraulic sensor I bought for a Lishui harness is opposite to what I need (why do they do this? Grr), so both connectors are male. After cutting the plugs off, how do I know which wire connects to which (3 wire), please?

 

[Nealh]

The Bafang is a Higo connector and the Lishui probably a Julet connector even if the M/F connectors were correct they would not work as the wire sequence is different.

Tell us the wire colours, generally 5v/Red goes to Red or Brown, Gnd / Black goes to Black or if no Black then Yellow and signal is the two wires remaining.

 

[Dali]

Both Julet. Bought this:


Instead of this:


Thank you, I will strip them tomorrow and look as they want 30 quid inc huge shipping fee:

Brake Sensor instead of Brake levers in YOSE POWER Kits

1.Technical dataFit for: all kind of bike, especially for bike with hyraulic brake Cable length(with sensor & plug): 380mmLead mode: three-wireWeight: 0.025kgInstallaion manual: PDF link2.Packing list2x brake sensors2x magnets3.Warm tips*Shipping from China takes 20-30 working days.*For the...

yosepower.com

 

[Dali]

Okay, both the plug on the incorrect male sensor has identical wiring to the Yose male harness plug:


Join red to red etc or Does this mean I should swap red and white over when I connect as would be reversed in the female plug of the proper sensor?

 

[vfr400]

Red to red, black to black and white to white,

 

[Dali]

Red to red, black to black and white to white,

Many Thanks.

 

[Dali]

Worked perfectly for a while, displaying an error code on the screen when the brake was pulled, which is how I thought it must work, but then I lost drive permanently with this code flashing. I thought the magnet must have dropped off or moved but no. Introduced another magnet and nothing. Figured sensor failure and disconnected the recently soldered three wires and all was normal again, much to my relief. I began to suspect that my Lishui kit didn't like the Bafang sensor.

As an experiment I plugged in one of the Wuxing cable brakes which I couldn't use and worked just fine - with no error code!

It seems to work differently as looks like just a simple microswitch to me (could be reed inside still I guess):



Oh well, reluctant as I am it looks like I will have to spend the 30 quid and order the proper one and hope nothing was damaged, but so far it looks like I got away with it.

 

[vfr400]

Worked perfectly for a while, displaying an error code on the screen when the brake was pulled, which is how I thought it must work, but then I lost drive permanently with this code flashing. I thought the magnet must have dropped off or moved but no. Introduced another magnet and nothing. Figured sensor failure and disconnected the recently soldered three wires and all was normal again, much to my relief. I began to suspect that my Lishui kit didn't like the Bafang sensor.

As an experiment I plugged in one of the Wuxing cable brakes which I couldn't use and worked just fine - with no error code!

It seems to work differently as looks like just a simple microswitch to me (could be reed inside still I guess):
View attachment 38660


Oh well, reluctant as I am it looks like I will have to spend the 30 quid and order the proper one and hope nothing was damaged, but so far it looks like I got away with it.

It's a normal push-to-break switch withe two wires. One wire goes to the brake signal wire and the other to ground - either way round.

 

[Dali]

So third not needed?

I have identified the two which short, either by pressing the switch on the kitted cable brake (black/white) or removing the magnet on the wrongly bought reed switch (black/red).

So, if I wire the reed switch to the harness black to black and red to white it should work fine?

 

[vfr400]

So third not needed?

I have identified the two which short, either by pressing the switch on the kitted cable brake (black/white) or removing the magnet on the wrongly bought reed switch (black/red).

So, if I wire the reed switch to the harness black to black and red to white it should work fine?

Test it with a bridge if you're doubtful.