IP68
Last updated: Aug 9, 2026IP68 is dust-tight and protects against continuous immersion in water under conditions specified by the manufacturer (typically deeper than 1 meter for prolonged periods). The standard for submersible and marine equipment.
Solid 6
Dust-Tight
Liquid 8
Continuous Immersion (manufacturer-specified)
What IP68 means
The IP code IP68 is part of the IEC 60529 standard for ingress protection. The first characteristic numeral, 6, indicates the level of protection against solid objects and access to hazardous parts. The second numeral, 8, indicates the level of protection against the ingress of water. Together, these digits describe exactly what an enclosure rated IP68 can withstand.
For solid protection, the digit 6 means the enclosure is dust-tight. Protected against access to hazardous parts with a wire. No ingress of dust whatsoever. The test method is dust chamber (talcum powder) for 8 hours (2 hours if equipment is in operation) with enclosure under reduced internal pressure; no dust ingress permitted.
For liquid protection, the digit 8 means the enclosure resists continuous immersion (manufacturer-specified). Protection against the effects of continuous immersion in water under conditions specified by the manufacturer. Ingress of water in quantities causing harmful effects shall not be possible. The test procedure is conditions more severe than ipx7 agreed between manufacturer and user; depth and duration specified on the equipment.
IP68 vs IP69K: IP69K adds high-pressure, high-temperature jet resistance for washdown; IP68 focuses on continuous immersion. Some devices carry both. When specifying IP68 for a project, confirm the rating certificate from the manufacturer and consider that seals degrade over time with temperature cycling, UV exposure, and chemical contact.
Full specification table
| Parameter | Solid digit (6) | Liquid digit (8) |
|---|---|---|
| Protection level | Dust-Tight | Continuous Immersion (manufacturer-specified) |
| Description | Protected against access to hazardous parts with a wire. No ingress of dust whatsoever. | Protection against the effects of continuous immersion in water under conditions specified by the manufacturer. Ingress of water in quantities causing harmful effects shall not be possible. |
| Test method | Dust chamber (talcum powder) for 8 hours (2 hours if equipment is in operation) with enclosure under reduced internal pressure; no dust ingress permitted. | Conditions more severe than IPX7 agreed between manufacturer and user; depth and duration specified on the equipment. |
| Object size / water pressure | No dust ingress | Specified by manufacturer |
| Test distance | Per standard | Specified depth (often > 1 m) |
| Test duration | Per standard | Continuous (specified by manufacturer) |
Typical applications
Submersible pumps
Underwater cameras
Marine sensors and sonar
Underground cable junctions
Diving equipment electronics
NEMA equivalent
Recommended products for IP68
IP68 submersible pump
IP68 underwater camera
IP68 cable gland
All IP68 comparisons
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