Hello, The depth rated dome for the acrylic 4”dome is currently 500m where the 3” is 750m. I have pretty much all components for the 3”. Now the 2”, 3” and 4” have a revision to use hardened polycarbonate. Will the depth rating for the 4” improve drastically with the new material? Thank you.

[image] Pierre021: … suddenly with the change of material the 5” has a depth rating lower than the 4” by 20% … certainly not minimal. The material is not the only relevant variable. Larger objects have the same pressure applied over a larger area, so have to resist more force. That said, per t…

Hi @Pierre021 - We haven’t tested the potential for an improved depth rating with polycarbonate vs. acrylic, but would expect the difference to be minimal (not drastic…) The big improvement will be impact resistance, both from a not-cracking, and not-scuffing (as easily) compared with acrylic!

This is interesting since each size of dome has a depth limit that is higher for the 2”, 3”, 4” acrylic but suddenly with the change of material the 5” has a depth rating lower than the 4” by 20%. I am sure there is a number in a depth simulator somewhere and 20% is certainly not minimal. I will wa…

Noting that the polycarbonate domes have been released :slight_smile:

Thanks Eliot. I’ve ordered the upgrade. To be honest I don’t really need the extra depth rating, but I kind of work on the principle that everything should fail at the same time. The Ping1 is my only real exception now and increasing the depth rating of that is going to be hard. Not only would the…

Depth rated new 4" dome

Blue Robotics Products Watertight Enclosures

EliotBR (Eliot) May 20, 2026, 4:05pm 7

And now we also have a higher depth rating option for the 4" dome

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