Hi @emersonvier,
Do you live in the US? Also, I’d be curious to see a picture of your casement window with the screen installed, or who the manufacturer is so I can track down pictures.
If you do live in the US then the Iris sensor may be able to be used depending how much room you have between the screen and the closed window. As long as there’s enough room for the thickness of the sensor body, you can get creative with magnet placement, including removing the plastic housing for the magnet. It doesn’t have humidity, and I don’t know of any open/close that do have humidity.