IP68 vs IP29K
Head-to-head comparison of two IEC 60529 ingress protection ratings.
IP68 and IP29K are both IEC 60529 ingress protection codes, but they differ in solid-object protection (level 6 vs 2) and liquid protection (level 8 vs 9K). IP68 is rated for dust-tight and continuous immersion (manufacturer-specified), while IP29K provides > 12.5 mm — finger and high-pressure, high-temp water jets.
IP68 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.
With IP29K, an enclosure receives protection against solid objects larger than 12.5 mm and resistance to high-pressure (8–10 MPa), high-temperature (80 °C) water jets. It is an IEC 60529 ingress protection code combining first-digit (solid) level 2 with second-digit (liquid) level 9K.
Detailed comparison
The stronger rating on each row is highlighted in emerald.
Solid protection (first digit)
IP68
6 — Dust-Tight
IP29K
2 — > 12.5 mm — Finger
Liquid protection (second digit)
IP68
8 — Continuous Immersion (manufacturer-specified)
IP29K
9 — High-Pressure, High-Temp Water Jets
Dust-tight
IP68
Yes
IP29K
No
Water-jet resistant
IP68
Yes
IP29K
Yes
Submersible
IP68
Yes
IP29K
Yes
Outdoor suitable
IP68
Yes
IP29K
Yes
The exact difference (IP68 vs IP29K)
Solid protection
IP68
Level 6 — Dust-Tight
IP29K
Level 2 — > 12.5 mm — Finger
IP68 provides "Dust-Tight" (level 6), while IP29K provides "> 12.5 mm — Finger" (level 2). IP68 is 4 levels higher.
Liquid protection
IP68
Level 8 — Continuous Immersion (manufacturer-specified)
IP29K
Level 9 — High-Pressure, High-Temp Water Jets
IP68 handles Specified by manufacturer (Continuous Immersion (manufacturer-specified)), while IP29K handles 8–10 MPa (High-Pressure, High-Temp Water Jets). IP29K provides 1 level more liquid protection.
NEMA equivalents
No direct NEMA equivalent.
Recommendation
IP68 offers higher overall protection than IP29K. Choose IP68 for harsher environments; IP29K may suffice for milder conditions and can be more cost-effective.