Hi,
I want to put arduino inside a pressurized enviroment (air pressure would ideally be between 4-8 bar).
Note: unfortunately in my project it is not possible to put the arduino outside of the pressurized enviroment.
Does anyone have an idea if Arduino would support such pressures or up to how much air pressuere it would be safe to use it ?
Thank you in advance for your help
Renata
The more "usual" question regarding pressure, is the ability to withstand vacuum. 
As no part of the assembly contains compressible gas, it should be no problem. (I presume the resonators or crystal are evacuated and hermetically sealed in a strong case).
Surprised you can’t put it outside - how are you powering it and getting signals back to the outside?
Pressurising a normal battery is not a great idea.
One way to find out... try it and see what happens!
Indeed other than batteries I don't see any obvious issues, but I don't think having ever seen pressure ratings for parts in data sheets - other than when it comes to pressure sensors of course.
You have not described the environment other than the air pressure. Will the air be dry? Do you expect the electronics to continue to operate if you rapidly decrease the air pressure?
Paul
Google bought up this :