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Old 02-24-11, 01:01 PM   #1
JohnnyCyclist
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Wireless cadence sensor affected by temperature?

I bought a new cyclocomputer with wireless cadence. It's @#!$ cold out there. When my bike is indoors, I can spin the pedals, hear the magnet "click", and see the cadence display on my computer. When I go for a ride, I get cadence for only a few minutes, then no cadence.

I have stopped and checked to be sure the magnet/sensor are still in range (they are). Temperature seems to be the only difference. Btw, there is no problem with the speed sensor, it keeps working in the cold. If it isn't obvious already, the speed and cadence sensors are separate; it's not a combined unit.

Is this a common problem? Or maybe I've just got a weak battery in the cadence sensor? I don't have any spare CR2032's right now, else I would have swapped one in before posting this.

Thanks.
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Old 02-24-11, 01:07 PM   #2
Nerull
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Originally Posted by JohnnyCyclist View Post
I bought a new cyclocomputer with wireless cadence. It's @#!$ cold out there. When my bike is indoors, I can spin the pedals, hear the magnet "click", and see the cadence display on my computer. When I go for a ride, I get cadence for only a few minutes, then no cadence.

I have stopped and checked to be sure the magnet/sensor are still in range (they are). Temperature seems to be the only difference. Btw, there is no problem with the speed sensor, it keeps working in the cold. If it isn't obvious already, the speed and cadence sensors are separate; it's not a combined unit.

Is this a common problem? Or maybe I've just got a weak battery in the cadence sensor? I don't have any spare CR2032's right now, else I would have swapped one in before posting this.

Thanks.
Cold can be hell on certain batteries, but CR2032s are lithium, which tend to be pretty temperature resistant.
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Old 02-24-11, 01:15 PM   #3
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+1 on the cold battery as a place to test ..
see what it's like, bike coming straight out of the warm House.
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Old 02-24-11, 01:18 PM   #4
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Thanks much. Time to buy some CR2032's anyway. I'll get some fresh ones and test the swap.
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