Hi..I've got to replace the speed odometer sensor on a Rewaco trike,

[ccjredfern]

The magnetic sensor on the my trike front disc only has 2 cables blue and brown, yet the new ones I see all have 3 cables..blue brown and black...any help would be appreciated..thank you..

[Kawazuki]

I'd assume the black is an added earth / ground . . . . . although what it achieves in this type of sensor is beyond me!

[1130cc]

I'd assume the black is an added earth / ground . . . . . although what it achieves in this type of sensor is beyond me!

I was thinking exactly the same thing

Then I did some reading, though not sure I am ant the wiser - https://automation-insights.blog/2012/0 ... e-sensors/

[Deep Diver]

I'd assume the black is an added earth / ground . . . . . although what it achieves in this type of sensor is beyond me!

I was thinking exactly the same thing

Then I did some reading, though not sure I am ant the wiser - https://automation-insights.blog/2012/0 ... e-sensors/

It says in the questions that if you have a two wire sensor, it should have the same two wire sensor replacement.

[ccjredfern]

Thank you for your reply...can't find a 2 wired anywhere..

[ccjredfern]

If I can't find a 2 wire I'll try the 3 wire as they're not expensive..so...thank you..

[Kawazuki]

Well hold on! If the manufacturer / supplier has changed from a two wire to a three wire - they are totally different sensor technologies - the former senses a ferrous metal and outputs a sine wave, variable AC voltage ranging from millivolts to volts based on speed of operation. The latter 3 wire is (usually) a 'Hall Effect' device which is fed a voltage supply usually either 5, 8 or 12v DC on one wire, one is an earth and the remaining is the sensor output - usually a square wave pattern ie the sensor will switch on - off in presence of a ferrous object. They aren't interchangable as wiring & sensor output is dedicated to each type.

[ccjredfern]

Hi, good news...I've managed to find 1 on the internet....2 wire so sorted, hard to find, 3 wire is easy to find...so.Thanks everyone for your input.
Its appreciated .....