When shopping for rugged devices, you'll frequently encounter IP ratings like IP67, IP68, or IP69K. Understanding these ratings is crucial for choosing the right device for your needs. Let's break down what these numbers actually mean.
What is an IP Rating?
IP stands for "Ingress Protection" (sometimes called "International Protection"). It's a standard defined by the International Electrotechnical Commission (IEC) that classifies the degree of protection against solid objects and liquids.
The IP rating consists of two digits:
- First digit (0-6): Protection against solid objects
- Second digit (0-9K): Protection against liquids
First Digit: Solid Object Protection
| 0 | No protection |
| 1 | Protected against objects larger than 50mm |
| 2 | Protected against objects larger than 12.5mm |
| 3 | Protected against objects larger than 2.5mm |
| 4 | Protected against objects larger than 1mm |
| 5 | Dust protected (limited ingress permitted) |
| 6 | Dust tight (no ingress permitted) |
Second Digit: Liquid Protection
| 0 | No protection |
| 1 | Protected against dripping water |
| 2 | Protected against dripping water when tilted |
| 3 | Protected against spraying water |
| 4 | Protected against splashing water |
| 5 | Protected against water jets |
| 6 | Protected against powerful water jets |
| 7 | Protected against temporary immersion (1m for 30 min) |
| 8 | Protected against continuous immersion (depth specified) |
| 9K | Protected against high-pressure, high-temperature jets |
Common Ratings Explained
IP67
Dust tight and can be submerged in 1 meter of water for 30 minutes. Good for occasional splashes and rain, but not for swimming or diving.
IP68
Dust tight and can be submerged beyond 1 meter (manufacturer specifies depth). Most rugged phones are rated for 1.5-2 meters for 30+ minutes. Suitable for underwater photography and accidental drops in water.
IP69K
The highest rating available. Dust tight and protected against high-pressure, high-temperature water jets. Originally designed for road vehicles that need regular steam cleaning.
Important Caveats
Keep these points in mind:
- IP ratings are tested in freshwater - salt water and chlorine can cause damage
- Ratings apply to new devices - seals can degrade over time
- Drops and impacts can compromise seals
- Water damage is often not covered by warranty despite IP ratings
Conclusion
Understanding IP ratings helps you choose the right device for your environment. For most outdoor and industrial use, IP68 provides excellent protection. For environments with high-pressure washing or extreme conditions, look for IP69K.
All RUGGTECH devices clearly display their IP ratings, so you can make an informed decision for your specific needs.