Operate Arduino below water ?

I have a project that needs to fully submerge an arduino to 10 Meters depth
How would you do it ?

I have a project that needs to fully submerge an arduino to 10 Meters depth
How would you do it ?

By putting it into a waterproof container. The have been doing this for decades for underwater photography.


Yep thats one way but what size and shape and how to waterproof it and be able to get in and out for service?
Has anyboody done this and what problems did they see?

I also thought of encapsulating it in epoxy but thats pretty final

Just looking for ideas lefty


Are you planing to build the container ? If yes, than here how I will do it. I wil be looking into plexy glass ( kind of plastic ) - I will use anything plastics. I will need a rubber seal, ( kind of O ring ) and 4 plastic nuts & bolts.

Here my idea : --------------------------
bolt rrrrrrrrrrrrrr bolt ← outside
r r
r inside r <— r is rubber seal
r r
bolt rrrrrrrrrrrrrr bolt

Think of a box within a box. It the only idea I can think off my head.

I think retrolefty's comment was quite valid, especially as you provided almost no information about the application.

All you have to do is Google for "waterproof container" or some such I would think.

Have a look at Pelican, they make nice boxes in every possible size.



Can you tell us more about the project:

  • project goal

  • what do you want to measure?

  • what kind of sensors do you have in mind?

  • what actuators are involved?

  • what are the actions the device will take

  • log measurements to sdCard, run motor/servo, shine a LED, buzz, apply some force
  • this can be conditional of course e.g. sensor >> thresshold
  • about the water?
  • river (floating water)
  • lake (no moving water)
  • clean, dirty?
  • is it water? my assumption
  • how do you intend to get the Arduino back above surface? (assuming that is your intention at some moment :wink:
  • rope
  • should do it autonomously ( balloon)
  • how long should it be submerged?
  • is battery feed a real option or not?
  • (how) do you intend to keep contact with the Arduino when submerged
  • cable
  • wireless
  • submerged operator (diver)
  • no contact
  • Must the Arduino be submerged?
  • is it an option to have the Arduino above the water and the sensors and/or the actuators below surface? (less chance for damage, shortcut etc)
  • it may be easier to waterproof sensors than a complete device including battery

I know many questions, but by answering these we can provide better help.


Some less-than-helpful messages have been deleted from this thread.
Please keep it civil.

Pelicans are really good - some have clear windows, and I use them for self-contained underwater slave strobes down to thirty metres.
Otter boxes also good.
However, if you have to breach the case to connect a cable, then I'd say bets are off, unless you pressurise the case to 2 bar.