ywu

I think that's resolved it. I've got an airgap of about an inch between sensor and magnet and it's enough for the alarm to say it's "secure" that the door is "closed".

There was a gap of around 0.75 cm between the sensor and the magnet before. Maybe i'm putting them too close together and they need that air gap? I've now tried multiple orientations and it still triggers.

Is there an issue with it being Grade 3? I have tested it on two sides of the sensor but it's the same issue. Perhaps it matters what the poles of the magnets are used? I haven't tried that yet.

In preparation for my renovation, I detached the garage door contact sensor and the magnet, which as expected, caused a tamper alarm. The sensor has been put back together and my hope was, I'd bind the two together until the work is done in that area but what I'm finding is the control panel shows a tamper alert when the magnet is brought into proximity with the sensor. No fault is there when they are separated. What might be the issue? Here's what the sensor looks like inside.