Question

i'm working on a design of underwater system which consists of arduino board + 4 sensors and battery how can i waterproof the system please the one whom would like to answer the question provide me with different options i don't want use glue or silicon or nail polish i need something which is more feasible and professional

Answer 1

The easiest thing to do is to get one of those airtight boxes for food storage and place the Arduino in there. If you want any wires to come out, cut a hole and use hot glue¹ or some waterproofing substance (like plumber's epoxy)

Another way is to dip the board in wax.

Another way is to use the following

• Some plumber's strapping.
• Some hollow tubing (a piece from a rainbird sprinkler riser, it will work great!)
• A few screws.
• Some longish bolts, use a lot of matching nuts and washers.
• Use airtight plastic cases large enough to occupy arduino board, battery and 4 sensors.
• The arduino board should be smaller than the lid of the case.