IP28
Last updated: Aug 9, 2026Specified under IEC 60529, IP28 denotes protection against solid objects larger than 12.5 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 2 with second-digit (liquid) level 8.
Solid 2
> 12.5 mm — Finger
Liquid 8
Continuous Immersion (manufacturer-specified)
What IP28 means
The IP code IP28 is part of the IEC 60529 standard for ingress protection. The first characteristic numeral, 2, 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 IP28 can withstand.
For solid protection, the digit 2 means the enclosure is > 12.5 mm — finger. Protected against access to hazardous parts with a finger. Protected against solid foreign objects of 12.5 mm diameter and greater. The test method is jointed test finger (12 mm diameter, 80 mm length) shall not penetrate with adequate clearance.
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.
IP28 vs IP29K: the higher rating adds high-pressure, high-temp water jets. When specifying IP28 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 (2) | Liquid digit (8) |
|---|---|---|
| Protection level | > 12.5 mm — Finger | Continuous Immersion (manufacturer-specified) |
| Description | Protected against access to hazardous parts with a finger. Protected against solid foreign objects of 12.5 mm diameter and greater. | 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 | Jointed test finger (12 mm diameter, 80 mm length) shall not penetrate with adequate clearance. | Conditions more severe than IPX7 agreed between manufacturer and user; depth and duration specified on the equipment. |
| Object size / water pressure | 12.5 mm sphere / jointed finger | Specified by manufacturer |
| Test distance | Per standard | Specified depth (often > 1 m) |
| Test duration | Per standard | Continuous (specified by manufacturer) |
Typical applications
Submersible equipment
Rugged portable devices
Outdoor field instruments
Continuous-submersion equipment
NEMA equivalent
Recommended products for IP28
IP28 submersible enclosure
All IP28 comparisons
69 pairsIP28 offers higher overall protection than IP00. Choose IP28 for harsher environments; IP0
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IP28 offers higher overall protection than IP10. Choose IP28 for harsher environments; IP1
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IP19K and IP28 offer comparable overall protection; choose based on the specific protectio
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IP28 offers higher overall protection than IP27. Choose IP28 for harsher environments; IP2
IP29K offers higher overall protection than IP28. Choose IP29K for harsher environments; I
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IP28 and IP37 offer comparable overall protection; choose based on the specific protection
IP38 offers higher overall protection than IP28. Choose IP38 for harsher environments; IP2
IP39K offers higher overall protection than IP28. Choose IP39K for harsher environments; I
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IP28 and IP46 offer comparable overall protection; choose based on the specific protection
IP47 offers higher overall protection than IP28. Choose IP47 for harsher environments; IP2
IP48 offers higher overall protection than IP28. Choose IP48 for harsher environments; IP2
IP49K offers higher overall protection than IP28. Choose IP49K for harsher environments; I
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IP28 offers higher overall protection than IP51. Choose IP28 for harsher environments; IP5
IP28 offers higher overall protection than IP52. Choose IP28 for harsher environments; IP5
IP28 offers higher overall protection than IP53. Choose IP28 for harsher environments; IP5
IP28 offers higher overall protection than IP54. Choose IP28 for harsher environments; IP5
IP28 and IP55 offer comparable overall protection; choose based on the specific protection
IP56 offers higher overall protection than IP28. Choose IP56 for harsher environments; IP2
IP57 offers higher overall protection than IP28. Choose IP57 for harsher environments; IP2
IP58 offers higher overall protection than IP28. Choose IP58 for harsher environments; IP2
IP59K offers higher overall protection than IP28. Choose IP59K for harsher environments; I
IP28 offers higher overall protection than IP60. Choose IP28 for harsher environments; IP6
IP28 offers higher overall protection than IP61. Choose IP28 for harsher environments; IP6
IP28 offers higher overall protection than IP62. Choose IP28 for harsher environments; IP6
IP28 offers higher overall protection than IP63. Choose IP28 for harsher environments; IP6
IP28 and IP64 offer comparable overall protection; choose based on the specific protection
IP65 offers higher overall protection than IP28. Choose IP65 for harsher environments; IP2
IP66 offers higher overall protection than IP28. Choose IP66 for harsher environments; IP2
IP67 offers higher overall protection than IP28. Choose IP67 for harsher environments; IP2
IP68 offers higher overall protection than IP28. Choose IP68 for harsher environments; IP2
IP69K offers higher overall protection than IP28. Choose IP69K for harsher environments; I