Then I would join @. It is certainly a fracture sensor and part of an alarm system.
If a chimney/oven and a kitchen are in a room, a so-called contact switch must be installed on at least one window so that the extractor hood can be switched on. If, when the window is closed and the open fire, the extractor hood is active, it would suck the CO2 out of the chimney shaft into the space, which can be fatal.
Do you happen to be in the same room with a hood and an open fireplace or oven?
No, it's in the living room
no fireplace available
yes the windows can be opened at the bottom of such a lever so you can tilt the window.
Then I would join @. It is certainly a fracture sensor and part of an alarm system.
If a chimney/oven and a kitchen are in a room, a so-called contact switch must be installed on at least one window so that the extractor hood can be switched on. If, when the window is closed and the open fire, the extractor hood is active, it would suck the CO2 out of the chimney shaft into the space, which can be fatal.
You better ask your landlord.
Looks like a collapsed break-in alarm system.
I wouldn't trust her to work seriously.
A fake burglary. I think you're supposed to have criminals come to visit you. You can dispose.
The first is a motion detector of a Telenot alarm system and the other glass break detector or door contacts 😉
Greetings
I would say that belongs to an alarm system
in the third picture are glass break sensors
and that in the first could detect an opening of the window
Is the apartment flat flat flat?
Only then would an alarm make sense on the windows. Something else I can't imagine.
Looks like an alarm system.
Murx what else?
Could it also be an older alarm system?🙄
Murx