WHAT IS IP68 & IP69K ?
IP68 vs IP69K Explained: What These Water and Dust Ratings Really Mean
If you've shopped for a rugged phone or tablet, you've seen ratings like IP68 and IP69K on the spec sheet. They sound similar, and many buyers assume the higher number simply means "more waterproof." In fact, the two ratings test very different things. Here's what each one means and which matters for you.
What Does "IP" Stand For?
IP stands for Ingress Protection. The rating comes from the international standard IEC 60529, and it tells you how well a device's enclosure keeps out solids (like dust) and liquids (like water).
An IP rating has two digits:
- The first digit (0 to 6) rates protection against solids, such as dust and sand.
- The second digit (0 to 9) rates protection against water.
So in IP68, the 6 means dust-tight and the 8 means protected against continuous immersion.
IP68: Built for Dust and Submersion
The 6 is the highest level for dust. A device with this rating is completely sealed against dust, so fine particles can't get inside. This matters in dusty construction sites, workshops, and on dry, dusty roads.
The 8 means the device can survive being submerged in water. Here's the catch: the standard doesn't fix the depth or the time. The manufacturer decides and states the test conditions. For phones and tablets, that's commonly around 1.5 metres for 30 minutes, but it varies by brand. Always check the fine print, not just the badge.
IP68 is a good fit for: monsoon rain, accidental drops in water, rivers and streams, and splashes at the pool or beach.
IP69K: Built for High-Pressure, High-Temperature Water Jets
IP69K tests something completely different. Instead of dunking the device, it blasts it with powerful hot water.
The test comes from a road-vehicle standard (ISO 20653, formerly DIN 40050-9). It's used for equipment that gets pressure-washed, such as trucks, farm machinery, and food processing gear. In the test, a device is sprayed at close range with:
- Water at about 80°C
- Pressure of roughly 80 to 100 bar
- Jets from multiple angles while the device rotates
The "K" stands for Kraftfahrzeuge, the German word for road vehicles. A device with IP69K is built to survive the kind of cleaning that would damage normal electronics.
IP69K is a good fit for: factories, kitchens, food and dairy facilities, vehicle workshops, farms, and any job where equipment is hosed down.
IP68 vs IP69K at a Glance
| IP68 | IP69K | |
|---|---|---|
| Tests for | Dust-tight + continuous immersion | High-pressure, high-temperature water jets |
| Water test | Submersion at a manufacturer-stated depth and time | 80°C water at 80 to 100 bar, close range |
| Standard | IEC 60529 | ISO 20653 |
| Best for | Rain, drops in water, swimming areas | Pressure washing, industrial cleaning |
Does IP69K Include IP68?
No. This is the most common misunderstanding. The two ratings test different things, so passing one doesn't guarantee the other. A device could survive a pressure washer but not a deep dunk, or the reverse.
That's why you'll often see rugged devices listed with both ratings. It means the device passed immersion testing and high-pressure jet testing, giving you protection against the widest range of water exposure.
Limits to Keep in Mind
Water and dust ratings are real, but they come with caveats:
- They're tested in clean, fresh water. Salt water, soapy water, chlorinated pool water, and chemicals can affect seals over time.
- Seals wear out. Gaskets and port covers can degrade with age, drops, and repeated use. Check them regularly.
- Close every port cover and flap fully. An open or loose cover is the most common reason a rated device gets water damage.
- Dry the device before charging. Don't plug in a wet device, even if it's rated.
- Warranty may not cover water damage. Read the terms, since ratings and warranty coverage aren't always the same thing.
Which Rating Do You Need?
- Everyday outdoor use, monsoon, or travel? IP68 is enough.
- Industrial, food, or agricultural work with frequent washdowns? Look for IP69K.
- Not sure, or you want maximum protection? Choose a device with both IP68 and IP69K, plus a durability standard like MIL-STD-810H for drops, vibration, and temperature extremes.
The Bottom Line
IP68 tells you a device can handle dust and being submerged. IP69K tells you it can handle a hot, high-pressure wash. They're complementary, not interchangeable. Match the rating to the way you'll actually use your device, and always check the manufacturer's test conditions rather than relying on the badge alone.