What is IP69K?
IP69K is a protection level for equipment that is cleaned with hot water at high pressure. The “K” marks a rating from ISO 20653, a standard for road vehicles, which carries the earlier German DIN 40050-9 test forward. The related IEC rating is IPX9, the ninth water level in IEC 60529.
Both tests simulate a close-range steam or pressure-wash jet of hot water. They are the most severe water tests in the IP system.
What are the IPX9 and IP69K test conditions?
| Parameter | Value |
|---|---|
| Water temperature | 80 °C |
| Water pressure | 8 to 10 MPa (80 to 100 bar) |
| Flow rate | 14 to 16 litres per minute |
| Distance from nozzle to sample | 10 to 15 cm |
| Duration | 30 seconds at each angle |
| Angles | 0°, 30°, 60° and 90° |
The sample is typically placed on a turntable while the nozzle is held at each angle in turn. After the test, it is inspected for water ingress.
A few practical points follow from these numbers:
- The pressure is far higher than IPX6. The IPX6 jet uses 100 kPa at a distance of 3 m. IPX9 uses 8 to 10 MPa at 10 to 15 cm, which is roughly eighty to one hundred times the pressure at a fraction of the distance.
- The water is hot. The 80 °C jet stresses seals, gaskets and adhesives through thermal expansion as well as force.
- The test is short. Thirty seconds at each angle does not simulate daily cleaning over years.
Is IPX9 the same as IP69K?
The test conditions in the two documents are very close, and manufacturers commonly use “IP69K” and “IPX9” for the same capability. They are separate standards, though.
- IPX9 is part of the IEC IP system. It can be combined with the other digits, for example IP66/IPX9.
- IP69K is defined in ISO 20653 for road vehicles and is widely used for any equipment that faces pressure washing.
When you read a datasheet, check which one is quoted and whether it is supported by a test report. Some products carry a dual rating such as IP66/IP67/IP69K to show that jets, immersion and hot pressure jets were each tested.
Why is IP67 or IP68 not the same as surviving a hot pressure jet?
Immersion and pressure jets stress an enclosure in different ways.
| Stress | IP67 or IP68 | IPX9 or IP69K |
|---|---|---|
| Water contact | Whole enclosure under static water | Concentrated jet at one point |
| Force | Hydrostatic pressure from depth | Direct impact pressure of 8 to 10 MPa |
| Temperature | Not specified as hot | 80 °C |
| Duration | 30 minutes (IP67), set by the manufacturer (IP68) | 30 seconds per angle |
A seal that holds against 1 m of water can be driven open by a jet focused on a joint, a key edge or a cable entry. Heat can then soften the gasket and let water through. For that reason a product needs a stated 9 digit or IP69K rating to be treated as suitable for pressure washing, even if it also holds IP67 or IP68.
The reverse also applies. A keyboard that survives hot pressure jets is not automatically rated for immersion, so dual ratings matter if both exposures are possible. For the full set of digits, see the guide to IP ratings.
Where does IP69K matter?
The rating matters wherever cleaning uses hot water at pressure, directed at equipment from close range.
- Meat and poultry processing: daily wash-down with hot water and foam.
- Dairy and beverage: frequent hot rinse of filling and control areas.
- Food production lines: sanitation shifts using pressure washers.
- Pharmaceutical and chemical production: wet cleaning in process areas.
- Vehicle wash and heavy equipment: pressure and steam cleaning.
For the food sector, see food and beverage keyboards for the requirements in context, and the guide to washable, waterproof and wipeable keyboards for the differences between these terms.
What IP69K does not cover
- Chemicals. The test uses water. Foam cleaners, alkalis, chlorine and acid descalers can damage seals, legends and housings. Check approved agents and concentrations.
- Repeated cycling. The rating is established by a short test. Daily use over years brings ageing, compression set and thermal fatigue.
- The cable and connector. A rating on the keyboard body does not extend to a plug on the end of the cable. Look for a sealed, rated connector, or a design where the connector sits inside a protected area.
- Impact. Pressure jets are not impact tests. For knocks, see IK ratings.
- Compliance with a hygiene regime. HACCP is a food-safety management system, not a product certification, and no keyboard is “HACCP certified”. An IP69K rating helps cleaning, but it does not discharge a hygiene obligation.
- Direct use in hazardous atmospheres. IP says nothing about explosion protection.
What goes wrong in washdown areas?
Failures in wet production areas follow a few patterns, and each points to something to check before buying.
- Water behind the front face. A jet aimed at a key edge or a trackball surround finds any weakness in the seal. Moisture then sits inside until a short circuit or corrosion shows up weeks later.
- Cable entry failures. Glands loosen, cables flex and jackets crack, so water follows the cable into the housing. A moulded, sealed cable exit is better than a screw-in gland that relies on correct fitting.
- Chemical attack. Alkaline foam cleaners and chlorinated sanitisers soften or craze some plastics and harden some elastomers, after which a rating that was valid when new no longer holds.
- Temperature cycling. Hot washdown followed by cold-room operation moves seals through a wide range every day. Ask about the operating temperature range as well as the ingress rating.
- Pooling. A flat keyboard that holds water on its surface needs more time to dry and gives residues somewhere to collect. A smooth, sealed surface without recesses sheds water and cleans more easily.
None of these shows up in the IP code. They are answered by materials, cable design, a stated cleaning-agent list and sensible placement.
From our experience
Before we recommend a keyboard for a washdown area, we ask how often it is washed, where it sits and whether it is fixed or on a trolley. The mounting matters as much as the rating. A keyboard can be built to survive a pressure washer and still be knocked off a loose shelf by the jet, and a heavy unit flying across a production floor is a safety incident. So in washdown areas we specify the mount along with the keyboard.
How to choose a keyboard for washdown
Start from the cleaning procedure, not the label.
- Find the real method. Is it a low-pressure hose, a pressure washer, or steam? Get the temperature and pressure from site documentation if possible.
- Choose the IP level to match. Low-pressure hose: IP65 or IP66. Hot pressure washer: IPX9 or IP69K, with IP66 or IP67 alongside where splash or immersion is also likely.
- Choose the material for the chemistry. Stainless steel housings suit corrosive cleaners and abrasion, and silicone or similar sealed surfaces can suit sealed membrane keypads. See stainless steel keyboards.
- Decide where the keyboard sits. Moving it out of the direct jet, or behind a shield, reduces the load on the rating.
- Plan the cable and connector. Pick a sealed exit and, where possible, a connector located outside the wash zone.
- Check cleaning compatibility. Confirm approved cleaning agents and their concentration.
Compare the relationship between NEMA and IP in NEMA vs IP ratings when a project specification uses NEMA types.
What to check on the datasheet
- [ ] “IP69K” or “IPX9” stated explicitly, not only “waterproof” or “washdown ready”.
- [ ] Which standard is quoted: IEC 60529 or ISO 20653.
- [ ] Whether the product also holds IP66, IP67 or IP68, for jets and immersion.
- [ ] A test report or certificate reference for the specific model.
- [ ] Whether the rating applies to the keyboard alone, with the cable fitted, or when panel-mounted.
- [ ] Connector type and sealing.
- [ ] Housing material and finish, and the approved cleaning agents and concentrations.
- [ ] Operating temperature range, including cold-store to washdown swings.
- [ ] Any limits on pressure, temperature or distance in the instructions.
What to tell us for a quote
Tell us the cleaning method, water temperature, pressure and typical distance, the detergents and disinfectants used, how often cleaning happens, where the keyboard is mounted relative to the jet, and the cable length and routing. With these details we can propose a product, flag any gap between the product’s rating and the way it will be cleaned, and advise on placement. If you want a recommendation, contact us.
Sources and standards
- IEC 60529, Degrees of protection provided by enclosures (IP Code), including the IPX9 test
- BS EN 60529, Degrees of protection provided by enclosures (IP Code)
- ISO 20653, Road vehicles, Degrees of protection (IP code)
- DIN 40050-9, Road vehicles, Degrees of protection (superseded by ISO 20653)
Related guides and ranges
- IP ratings for keyboards and mice explained
- Keyboards and pointing devices for food and beverage processing
- Stainless steel and vandal-resistant keyboards
- Washable vs waterproof vs wipeable keyboards
- NEMA vs IP ratings for keyboards and enclosures
Frequently asked questions
What is IP69K and do I need it?
IP69K is a test for high-pressure, high-temperature water jets, defined in ISO 20653. You need it if the keyboard will be cleaned with hot water jets at close range, as in meat, dairy and many food plants. If you wipe or hose down with low pressure, IP65 or IP66 may be enough.
Is IP69K the same as IPX9?
They are close but not identical. IPX9 is the high-temperature, high-pressure jet test in IEC 60529, and IP69K comes from ISO 20653 for road vehicles, originally DIN 40050-9. Both use 80 °C water at 8 to 10 MPa. Many datasheets use the labels interchangeably.
Does IP67 or IP68 cover pressure washing?
No. IP67 and IP68 test immersion in static water. A pressure jet applies force at a point, at higher temperature, from close range, and can drive water past seals that hold under immersion. A keyboard for pressure washing needs IPX9 or IP69K stated in its own right.
Is an IP69K keyboard suitable for chemical cleaning?
Not automatically. The IP69K test uses water only. Foam cleaners, caustic detergents, chlorine and acid descalers can attack seals, legends and housings. Ask the supplier for the approved cleaning agents, concentrations and contact times for the specific product.
Do all washdown areas need IP69K?
No. The rating should follow the real cleaning method. Many wet areas use hoses at lower pressure, where IP66 is the closer match. Specifying IP69K for every wet location adds cost without benefit, while omitting it from a hot pressure-washed line risks water ingress.
