IP66 vs IP67
Head-to-head comparison of two IEC 60529 ingress protection ratings.
IP66 and IP67 are both IEC 60529 ingress protection codes, but they differ in liquid protection (level 6 vs 7). IP66 is rated for dust-tight and powerful water jets (12.5 mm nozzle), while IP67 provides dust-tight and temporary immersion (up to 1 m).
IP66 is dust-tight and resists powerful water jets (12.5 mm nozzle, 100 kPa). A robust outdoor rating for equipment exposed to heavy rain, storms, or directed high-pressure hosing (but not high-pressure washdown).
IP67 is dust-tight and withstands temporary immersion in water up to 1 meter for 30 minutes. The go-to rating for outdoor and rugged devices that may be briefly submerged.
Detailed comparison
The stronger rating on each row is highlighted in emerald.
Solid protection (first digit)
IP66
6 — Dust-Tight
IP67
6 — Dust-Tight
Liquid protection (second digit)
IP66
6 — Powerful Water Jets (12.5 mm nozzle)
IP67
7 — Temporary Immersion (up to 1 m)
Dust-tight
IP66
Yes
IP67
Yes
Water-jet resistant
IP66
Yes
IP67
Yes
Submersible
IP66
No
IP67
Yes
Outdoor suitable
IP66
Yes
IP67
Yes
The exact difference (IP66 vs IP67)
Solid protection
IP66
Level 6 — Dust-Tight
IP67
Level 6 — Dust-Tight
Both IP66 and IP67 share the same solid protection: Dust-Tight.
Liquid protection
IP66
Level 6 — Powerful Water Jets (12.5 mm nozzle)
IP67
Level 7 — Temporary Immersion (up to 1 m)
IP66 handles 100 kPa (Powerful Water Jets (12.5 mm nozzle)), while IP67 handles Hydrostatic ~10 kPa at 1 m (Temporary Immersion (up to 1 m)). IP67 provides 1 level more liquid protection.
NEMA equivalents
Recommendation
IP67 offers higher overall protection than IP66. Choose IP67 for harsher environments; IP66 may suffice for milder conditions and can be more cost-effective.