Hi all, I’m looking for a sealed transparent box that indeally can withstand 10 bar pressure. Purpose is to use that to test flashlight water resistant (which I believe no reviewer have done yet). same principal as test for watch like this https://youtu.be/2wOsnBd_7-k
i’m thinking of using magnet to move the flash light up/down from water, my bicycle pump can supply more than 10 bar pressure, now what missing is just the box
Any ideas/contribution is greatly appreciated, many thanks
Chris
Sounds like you need to build youself a clear pexiglass with a pressure gauge attached. I think Linus from linustech has a solution.
A few months back, I saw the watch testers on AliExpress and put of curiosity watched a few YouTube vids on how they worked. You’re correct that it seems nobody does pressure testing on flashlights, however this is fairly niche and would only apply to dive rated lights.
If you constructed a clear tube with a mesh shelf one end, you could fit the flashlight then pressurise, then invert the tube to tip the water onto the light, release the pressure and watch for bubbles.
It goes without saying, the pressurisation of non-certified vessels is pretty dangerous… As a dumb teenager, I drilled a hole in a 2L plastic soda bottle cap and added a valve cut out of an inner tube. Pumped that thing up with a bike pump until it popped, thankfully I had he presence of mind to cover the bottle with a jumper, shards of plastic still flew a scary distance, it’s not an experiment I repeated!
i prefer off the shelf instead of buying, but will check out the linus thing thanks
yes instead of inverting i thinking using two magnet, one inside and one outside to control the flashlight, that should not be a problem
as i see most flashlight have ip rating ( ip68) so maybe for those only test with pressure equal to 1.5m of water
Unless you have some transparent aluminum handy, plexiglass would have to be pretty thick.
No need to have all sides be see-through like an aquarium. Sheet-steel can be welded and only a window needed to see the light.
No idea how big you want the beastie to be, though.
https://www.amazon.com/Diameter-Clear-Schedule-Inches-approximately/dp/B07V114N2X?source=ps-sl-shoppingads-lpcontext&ref_=fplfs&psc=1&smid=A3W4WGX7SKSI7F&gQT=1
4 in clear PVC schedule 40.
You could glue a schedule 40 4-in PVC Union on there. Then glue a spigot by female npt of the smallest thread size you can get. You might need to use a few bushings to get down to 1/4 inch size or so. Then put a tee with a gauge and one more tee with a Schrader valve and then a drain valve on the end. You can glue whatever you want on the other end probably just a cap. Should be somewhere between $150 - 200. Make a little wooden stand to hold it up right. 2 16-in channel lock pliers.
Edit ,you’re probably going to have to convert all of that to metric
thanks, this seems more feasible now
https://www.amazon.com/Pentek-158116-Slim-Line-Housing/dp/B0045LS8QS/ref=asc_df_B0045LS8QS?mcid=7ae35026bbb93256b7a80ab1e0f93858&tag=hyprod-20&linkCode=df0&hvadid=693071387893&hvpos=&hvnetw=g&hvrand=16745178131526185643&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=9208321&hvtargid=pla-493476951511&psc=1
Some of these type filters are going to be rated to 100 PSI some 125PSI. These would be even quicker and easier because now you’ve got threaded holes on both sides. Most will accept a 10-in long cartridge. But you can buy some that will accept a 20-in long cartridge.
You won’t find rubber clicky switches on dive lights as they get activated with the pressure anyhow.
Not sure the IP68 rating includes being used. For most people I’d guess it would be sufficient to turn it on, submerge and see if it leaks.
if it leaks then water already get inside the flashlight, I wouldn’t risk that 
It’s for the tacticool crowd, who knows when you’ll have to hide in a sidewalk puddle?
In all seriousness though, people often wear dive rated watches because they’re overengineered for typical water involved activities, like rain, watering plants, that sort of thing. And everyday driving a lambo for its style, but the performance is there if you need it. The peace of mind of knowing that it can, vs. actually doing it.
Just reread your post, most ip68 ratings are under STATIC pressure, no actuation, no fiddling, no movement.
After I watched the watch test I was thinking about how to pressurize the system with the flashlight out of water and then put it in the water. Use something like a foam pool noodle and cut it into pieces that are 8, 10 and 14 inches long. You could then trap the flashlight on one side of the bowl or use the noodle to take up either the top or bottom of the bowl and then have the flashlight at the other end. Then you can pressurize the system and either turn the filter housing upside down or roll it on its other side to put the flashlight either in or out of water.
It looks like that Schrader valve is screwed in that pipe plug crooked. Did you drill your own hole in there? I would have used threaded bushings rather than making your own holes. If you’re going to start messing with over 100 PSI and air pressure you don’t want fittings blowing out.
yeah i did drill the hole myself, will test low pressure first to see how it goes. regrading the flashlight i think i will use some kind of hook attach to magnet inside and outside to move the flashlight up and down
also i dont think can fit the valve to the threaded bushings as the valve need some kind of “wall” to attach to. or did i miss anything?
Schrader valves are used for more than just wheels or tubes. Any auto parts store or online you should be able to find threaded Schrader valves. 1/4 inch pipe thread is probably the most common. Again I don’t know the size in metric. And you’ll need a threaded gauge for the other side also. You will be able to relieve pressure with the button on the top of the filter head. NPT is national pipe thread. Your kilometers may vary.
https://www.amazon.com/Anti-Corrosion-Schrader-Thread-Compressor-Sealing/dp/B09YQB8JRN
nice, tks for the info, i’ll check it out
