From Google AI:
IP (Ingress Protection): The standard code defining protection against solids and liquids.
First Digit (0-6): Solid Particle Protection (Dust). A "6" means totally dust-tight.
Second Digit (0-8): Liquid Ingress Protection (Water). An "8" means protection against continuous submersion at a manufacturer-specified depth, usually > 1m.
The "X": If a digit is replaced with X, it means it has not been formally tested for that factor.
IP68 and IPX8 both provide high-level, long-term submersion protection (waterproof beyond 1m), but differ in dust protection. IP68 guarantees both dust-tight resistance (6) and high-level water resistance (8). IPX8 signifies water resistance only (8), as the 'X' means the device was not officially tested or rated for dust protection.
Key Differences: IP68 vs. IPX8
- Dust Protection: IP68 ensures the device is completely dust-tight ("6"), while IPX8 ("X") does not certify protection against dust or solid particles.
- Waterproofing Level: Both signify the highest level of submersion, generally lasting more than 30 minutes at depths over 1 meter.
- Use Cases: IP68 is ideal for devices requiring protection from both sand/dust and water (e.g., smartphones). IPX8 is often found on items specialized only for underwater use (e.g., cameras, certain smartwatches).
Important Nuances
- Manufacturer Specifics: While both are "8" rated, the exact depth and time (e.g., 1.5m for 30 min vs. 6m for 30 min) vary by manufacturer.
- Fresh Water: These ratings are generally tested in fresh water, not swimming pools, saltwater, or hot showers.
- IPX8 Limitation: A device rated IPX8 might be perfectly waterproof but could fail if dust enters the device.