Enclosure selection
As an enclosure for Raspberry PI, Kradex Z74 with transparent lid was selected. As can be seen, Raspberry PI with CN-0575 SPE shield occupies about half of it, giving some space for additional components
Enclosure itself - rated for IP65 (so it is protected from dust ingress and from water jets from any direction, but not for water immersion), has foam-roll gasket between the main part and the lid that should be trimmed and self-installed from the provided length
Raspberry Pi itself was screwed into section of PCB cut-out to the shape of enclosure floor, boards connected using 2.5mm spacers and screws - RPI has mounting holes of 2.7mm diameter, so more common 3mm spacers cannot be used.
Immersion test
As this enclosure was a part of my research set from Extreme Environment challenges, let's test it Extreme Env way - never mind the formal rating, drop it into the water (with paper towel inserted to quickly identify water leaks)!
And? No excessive bubbling, no water identifiable on the paper towel - success! This enclosure survived short-term water immersion - more tests will be executed as the project advances.
