Security alarm window sensor battery drain, from trainer?

Equipment
1

So I have an alarm system on my house which has open/close type sensors on each window. Have had it for about 4 or 5 years now. Over those years I’ve had one window sensor that really likes to go through batteries compared to the others. I have to change the battery every 2-3 months whereas the other 10+ sensors have never needed to be changed. It’s annoying because it always triggers the low battery warning in the middle of the night.

Alarm company can look at it but it’s during the day so I’d have to take time off work, pay for inspection/parts/etc. so I’ve basically been lazy about it and just dealt with it since it happens so infrequently.

And then about a month ago I got to thinking. That particular sensor is right next to my trainer, like within 3 feet. So I think the big magnetic resistance unit inside the trainer is causing the battery drain. In this time I had an original Kickr and about 2 years ago switched to a Saris H3 so I don’t think it’s specific to my current trainer.

So I guess I’m hoping there is some kind of electrical engineer on here that might see this and have a suggestion for some type of shield I can build for the sensor to test out. Or any other ideas.

Note, I could rearrange the room to get the trainer farther away but would really rather not as I have it set up exactly how I want it.

2

You could try this

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3

Can you swap the sensor for another one to prove it isnt just faulty?

I find it difficult to believe a turbo trainer could do this.

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4

Unless it is the vibration from the trainer, rather than the EMF?

5

I thought about that, maybe I should try.

Interesting, never thought about that. Could be right.

6

An open-close sensor is just based on a reed switch and a magnet. Magnetic force is very distance sensitive; there’s no way a trainer 3 feet away is causing battery drain; it’s probably just faulty, or installed badly (i.e. the magnet isn’t quite close enough to the sensor when it’s closed).

And yeah, batteries tend to reach the low-battery level in the middle of the night, because they’re temperature-sensitive.

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