Many gadgets come with claims of how they are waterproof and resistant to damage from dust and other contaminants. But those claims are sometimes quite nebulous. After all, what does waterproof really mean? Does it mean a device can survive a splash? Or that it can be dunked in a bath?

That's why the IP rating system was created. It provides a quantifiable measurement of how resistant a device is to environmental conditions. Let's look at how the ratings work.