A few years ago, I got into diving. Since I am such an amateur photographer that I photograph extremely rarely, all my underwater photography was reduced to advice to friends on which camera to choose, and then click it a couple of times under water. Of course, almost the best photos came out by accident, and the best ones didn’t come out at all, because at that moment there was no camera at hand. And at some point I wanted to indulge in something small and cheap. Of course, there was no talk of any GoPro, since this truly video blogging camera, of course, is cool in all sorts of extreme conditions on promo videos, but in reality it gives a rather dull spectacle underwater, which a normal person is then simply not able to watch (shaking, blue and other delights of cheap underwater photography). Therefore, the choice fell on the Chinese noname for
Then she walked for some time, then lay for a long time and waited for the trip, but still she waited. Of course, the first test is carried out without a camera. It is necessary to check if the box holds pressure (even GoPros tend to leak periodically). I was very sorry that the bottom is at 10 meters, since the box is designed for 30 meters, and I would like to check it for sure. However, 10 meters was enough. He, of course, did not explode, but he took in about 5 ml of water, which may well be enough for a small chamber to drown. After that, he was thrown into a suitcase before returning home. Suspicion fell on a too soft and not very reliable (although GoPro has the same) seal, which it was decided to slightly seal by lifting it up. However, there was nowhere to test the box after the upgrade, because there are no deep reservoirs nearby, and it’s lazy to drag it somewhere. After all, the 21st century is in the yard, and 4 atmospheres can be obtained even at home with the help of a car pump.
But it was difficult to imagine a convenient vessel for such tests until an old Soviet pressure cooker caught my eye.
Instead of a weight, a piece of hose with a sleeve from an auto-nipple was attached to the bleed valve (which is now commonly called smart in multicookers).
Further, the entire pressure cooker was filled with water, and a box was placed in it, after which an excess pressure of 1 to 4 atmospheres was created by a pump.
The weight inside keeps the box on the bottom of the pan. Experience has confirmed that boxing does flow systematically. But it was still interesting where exactly, because there are many options. To determine the exact location of the leak, for the next test, the box was filled with toilet paper (gray to better see the moisture), and crushed to 1 excess atmosphere.
Leaks are clearly visible on the paper impression.
Such a large spot was obtained at 4 atmospheres. With one, its diameter was half that. As it turned out, the box is leaking at the point of attachment to the tripod, where a metal nut is inserted into the plastic. At the same time, the seal does not let in anywhere. The downside of this setup is the inability to test the box buttons for leaks. If somehow boxing can be brought back to life, this will definitely be the next note.