Samsung GN2 image sensor、Super fast charging silicon oxygen negative electrode battery、After the official announcement of full phase change heat dissipation technology，Xiaomi Mi 11 Ultra adds another world premiere - a high-permeability pressure relief valve。
According to Xiaomi official，Xiaomi Mi 11 Ultra will be Xiaomi’s first mobile phone to support IP68 waterproofing (the highest dustproof and waterproof level for electrical equipment)，1.5Soak rice in deep water for 30 minutes，But completely fine。
Xiaomi 11 Ultra debuts high-permeability pressure relief valve，Get a little inspiration from professional dive watches，Only breathable but not water permeable，The unit air permeability is twice as much as that of current waterproof mobile phones。
IP68 is familiar to everyone.。The so-called "6" refers to the highest dust-proof level of electrical equipment，Can completely prevent foreign objects and dust from entering the fuselage；"8" is the highest waterproof level for electrical equipment，Can be immersed in water for a long time under certain pressure，without being damaged。
It is reported that，This time Xiaomi Mi 11 Ultra received IP68 certification from Rheinland Germany，Can be immersed in 1.5 meters of water for 30 minutes without any harm。
everybody knows，As water depth increases，Water pressure will also increase，The pressure difference between the inside and outside of the mobile phone is formed，Brings huge pressure and challenges to air tightness。Therefore, some high-end professional diving watches are equipped with pressure relief valves.，Allows air to circulate without leaking，Achieve pressure balance inside and outside the mobile phone。
The high-permeability pressure relief valve of Xiaomi Mi 11 Ultra also works on the same principle.，Only breathable，impermeable，And the unit air permeability is as high as 25000ml/min under 7kPa pressure.，Twice as much as current waterproof mobile phones。
also，High permeability pressure relief valve can not only reduce the probability of deep water damage to a certain extent,，And taking off and landing on the plane、When entering or exiting extremely hot or cold environments or when the phone is squeezed，will be effective and helpful。
certainly，Even with IP68, it’s not foolproof。Any IP68 device is not permanently valid，With daily use，such as wear and tear、fall，will cause a decrease in air tightness performance，Risk of water intrusion。
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