When browsing mobile phones, headphones, Bluetooth speakers, etc. a device's IP classification is often mentioned. This refers to the devices waterproof and dust-resistance rating. There are a large number of IP classifications however, and most people don't know much about them. Here, we take a look at what the numbers mean.
A typical mobile phone IP rating can be, for example, IP68. Correspondingly, you often see IP57 rating in headphones. This is actually two separate numbers: the first number means dust resistance the second number means water resistance. The higher the number, the better!
The tests are carried out in official laboratory conditions and an official, approved IP classification is given to the device after the tests are concluded.
The first number of the IP classification, dust resistance, is defined as follows:
|What does it mean?
|No protection against dust at all.
|Protection against objects up to 5 cm in size, i.e. particles larger than five centimeters cannot enter the device's structures.
|Protection against 12.5 mm particles. That is, objects larger than a good centimeter cannot enter the device's structures.
|Protection against 2.5 mm particles. Small, but clearly visible, quarter-centimeter-sized particles cannot enter the device's structures.
|Protection against 1 mm particles. Pieces with a diameter of a millimeter - and pieces larger than that - cannot enter the device's structures.
|Protected from dust. In practice, no dust gets inside the device to the extent that it would hinder the operation of the device. Dust accumulations may occur.
|Perfectly protected against dust. Dustproof.