IP09K vs IP18
Head-to-head comparison of two IEC 60529 ingress protection ratings.
IP09K and IP18 are both IEC 60529 ingress protection codes, but they differ in solid-object protection (level 0 vs 1) and liquid protection (level 9K vs 8). IP09K is rated for no protection and high-pressure, high-temp water jets, while IP18 provides > 50 mm — back of hand and continuous immersion (manufacturer-specified).
The IP09K rating offers no protection against solid objects 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 0 with second-digit (liquid) level 9K.
The IP18 classification guarantees protection against solid objects larger than 50 mm and protection against the effects of continuous immersion in water under conditions specified by the manufacturer.. It is an IEC 60529 ingress protection code combining first-digit (solid) level 1 with second-digit (liquid) level 8.
Detailed comparison
The stronger rating on each row is highlighted in emerald.
Solid protection (first digit)
IP09K
0 — No Protection
IP18
1 — > 50 mm — Back of Hand
Liquid protection (second digit)
IP09K
9 — High-Pressure, High-Temp Water Jets
IP18
8 — Continuous Immersion (manufacturer-specified)
Dust-tight
IP09K
No
IP18
No
Water-jet resistant
IP09K
Yes
IP18
Yes
Submersible
IP09K
Yes
IP18
Yes
Outdoor suitable
IP09K
Yes
IP18
Yes
The exact difference (IP09K vs IP18)
Solid protection
IP09K
Level 0 — No Protection
IP18
Level 1 — > 50 mm — Back of Hand
IP09K provides "No Protection" (level 0), while IP18 provides "> 50 mm — Back of Hand" (level 1). IP18 is 1 level higher.
Liquid protection
IP09K
Level 9 — High-Pressure, High-Temp Water Jets
IP18
Level 8 — Continuous Immersion (manufacturer-specified)
IP09K handles 8–10 MPa (High-Pressure, High-Temp Water Jets), while IP18 handles Specified by manufacturer (Continuous Immersion (manufacturer-specified)). IP09K provides 1 level more liquid protection.
NEMA equivalents
No direct NEMA equivalent.
No direct NEMA equivalent.
Recommendation
IP09K and IP18 offer comparable overall protection; choose based on the specific protection dimension (dust vs. water) that matters most for your application.