Hier is de oorspronkelijke bron:
https://www.reddit.com/r/...y_ios_device_in_facility/
Tevens hebben mensen het getest:
We were running into this issue at my old work, and so we actually tested exactly your suggested experiment. We found that, in a 100% He environment, iPhones would die in about 90 minutes (and eventually would recover). We were also looking at a bunch of MEMS oscillators in helium directly, and found that 1) an hour in 100% He would be sufficient to get the oscillation to drift out of spec (as measured by a network analyzer) and that 2) the oscillators would return to normal after about 16 hours. We also found that the drift was dependent on partial pressure of He in the atmosphere -- i.e., at 20% He, oscillators would take longer to drift out of spec than at 100% He. All of this is to say that /u/captaincool has got it exactly right.
A few tenths of a percentage point of He in the atmosphere wouldn't be noticeable to people, but could definitely cause problems with the oscillators (and any CPU depending on it for timing) once enough He had diffused into the oscillator.
/u/harritaco, helium can get through plastic bags incredibly easily -- you've seen balloons deflate after a day despite being sealed, right? Helium is literally diffusing straight through the balloon material. (Yes, there's an ever-so-slight pressure difference, but it's not the main driver, there.)
ze gaan dus niet kapot maar werken niet zolang het helium er nog in zit. Hier hebben ze over 16 uur en dan werken de apparaten weer.