> > Perceived high failure rate? I don't think I've ever had a speedo
> > reed switch last more than 6 months.
> 
> You're buying the wrong ones, or abusing them in some way I'm not
> aware of them. I've got several I've had for years without failure -
> including a couple on a mountain bike (I have two independent sensors
> on the same bike) which given I'm in the UK get ridden through all
> sorts of filth, get hosed down etc.


I'll agree with that.  I've never had one go faulty, the only one I've
'lost' was on a friends bike, and that was from physical abuse, the sensor
was banged on something and the wire torn away.  I think most failures would
be wiring damage or corrosion before failure of the reed switch itself.

I actually made a new sensor, I epoxied a reed switch inside a small plastic
tube.  On the tube I cut two notches for the cable ties and sanded one side
flat for orientation.  Just a file & a drill.

That was about 5 years ago, it still worked last I saw of it.

Given the abuse the sensors take, I'm impressed at their reliability.  Of
course I broke the first reed switch trying to bend the lead on it...

Tony

(Second sensor for cadence, I presume?)

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