What are IP (Ingress Protection) Ratings?

The Ingress Protection (IP) rating system was specified by IEC(International Electrotechnical Commission) to classify the protection of electrical appliances according to their characteristics of dust and moisture.
The rating is specified by the letters IP followed by two numbers, such as IP65, IP68, etc.
The higher the number, the higher the protection level!

First Number – Degree of Ingress Protection

The first number of IP rating indicates the degree of protection against solid objects intruding. The highest level is 6.0 – No protection.1 – The entry of objects larger than 50 square mm is protected.2 – The entry of objects larger than 12.5 square mm is protected.3 – The entry of objects larger than 2.5 square mm is protected.4 – The entry of objects larger than 1.0 square mm is protected.5 – Protection against the entry of dust, although it can not completely prevent, the intrusion of dust will not affect the normal operation of the electrical appliances.6 – Complete protected against entry dust.

Second Number – Degree of Moisture Protection

The second number of IP rating indicates the degree of protection for waterproof including the dripping, submersion, spraying, etc. The highest level is 8.
0 – No protected.
1 – Protection against drops of water falling vertically.
2 – Protection against drops of water falling vertically when the light assembly is tilted up to 15 degrees from its normal position.
3 – Protection from the entry of water spray from the angle of up to 60 degrees from vertical direction.
4 – Protection from the entry of water splashes or spray from all direction.
5 – Protection from a low-pressure jet of water from all direction at least 3 minutes.
6 – Protection against heavy seas or a strong jet of water in any direction at least 3 minutes.
7 – Protection against immersion up to 1 meter for 30 minutes.
8 – Protection against continuous submersion over 1 meter. (Should be decided between customer and manufacturer)
For example, IP67 means complete protection against the entry of water when submerged in up to 1-meter water for 30 minutes.

These following pictures are showing how we do headlights waterproof IP67?

American DOW CORNING 7091 Waterproof Glue
Germany HENKEL E40 Structural Glue

Waterproof and breathable membrane
There are three waterproof and breathable membranes in each headlight, made of a material that allows air to pass through but does not allow water to pass through.
These breathable membranes also allow you to adjust the air pressure inside the headlamp, thus they prevent them from misting and condensation.

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