This is a simple enclosure for the [Ring Alarm Flood & Freeze Sensor](https://shop.ring.com/products/alarm-flood-and-freeze-sensor). I didn't want to kick my sensor across the floor on accident, nor into the sump pit.
I super-glued the printed bracket to the floor.
The design leaves plenty of room for water to infiltrate the sensor. Orient the sensor appropriately so the water grooves line up with the openings.