Eg: IPhone SE is said to be water resistant only upto 30 minutes and 1m depth. When something is water resistant, shouldn’t it be resistant irrespective of how long its soaked? What happens post the time limit or depth?
In: Engineering
It’s possible that there is other considerations but it’s certainly the case that many mechanical seals will only be rated to certain pressures and time exposures. For example, a thin o ring might be totally waterproof until it reaches a depth of 5 metres where the water pressure will overcome the mechanical force of the o ring. The rating is a combination of these probably cut in half so that the manufacturer can account for sub standard parts or processes.
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