IP Code also called Ingress Protection, is an International Protection Marking to rate devices based on the extent of protection provided by the casings and electronics enclosure against dust, water, collision impact, and intrusion.
The two numbers of the protection class have the following meaning:
- The first digit indicates how resistant the housing is against the resistance to foreign bodies.
- The second digit indicates the resistance to water.
Meaning of the first digit of the IP protection class
The first digit indicates how resistant the casings or electronic enclosures are to foreign objects. There are the following six gradings:
- Protected against solid foreign bodies with diameter from 50 mm.
- Protected against solid foreign bodies with a diameter of 12.5 mm or more.
- Protected against solid foreign bodies with a diameter of 2.5 mm or more.
- Protected against solid foreign bodies with a diameter of 1.0 mm or more.
- Protected against dust in damaging amount.
- No Dust allowed.
Meaning of the second digit of the IP protection class
The second digit indicates how waterproof the housing is. There are eight grades here.
- Protection against dripping water.
- Protection against falling dripping water when the housing is tilted up to 15 °.
- Protection against falling water sprays up to 60 ° to the vertical.
- Protection against splashes of water on all sides.
- Protection against jet water (nozzle) from any angle.
- Protection against strong jet water.
- Protection against temporary submersion.
- Protection against permanent submersion.
- High pressure and temperature water jet.
So what does protection class IP68 means
- The first digit 6, means according to the first table: The device is dustproof.
- The second digit 8, according to the second table means protection against permanent submersion.
- It follows that a device with IP68 protection is dust and waterproof.