I finished building my rov and testing the electronics, now I want to do an hermeticity testing to prove the sealing of the electronics tube. I have some questions:
1.- What I need to do to avoid the water leaks inside the tube?.
2.- The tube needs to be sumerged in the water with the small holes of the syringe on the end caps open or close?. Water doesn't leak through the small holes?.
3.- The endcaps seal properly in shallow water or their need to be in greater depth?.