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.
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 wait for tests and continue to build with 3” then. I could only find one LiFePo4 battery that fit inside the 3”.
3 posts were split to a new topic: 4" polycarbonate dome release date
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 the product page our 5" dome is also nearly twice as thick as the 4" one:
We’re not intending to change the dimensions of the new ones - just the material. Any updates to the depth rating won’t be confirmed until we’ve been able to perform sufficient long-term submersion testing, but we at least don’t expect it to be lower than the acrylic equivalents.
Noting that the polycarbonate domes have been released 