A simple stevenson screen which needs no tools to assemble.
The parts come together by simply srewing them together using the printed threads.

For attaching the screen to a 25mm pipe you will however need 4 screws M5x80 and 4 M5 nuts.

All parts are optimized for printing without supports:
1 x bottom.stl
1 x top.stl (is already upside down for printing without supports)
n x middle.stl (you need at least 2)

I made a slot in the bottom part for inserting a sensor holder (2 x 28mm, and as high as you want)