A product’s protection rating is expressed by the letters IP, followed by two numbers. The first number is the level of protection against intrusion by solid foreign objects, including particles like sand, dirt, and dust. The second number indicates the degree of water protection. If the code features an “X” instead of either number, it hasn’t been tested in that category.
Here’s how the ratings break down:
IPX0
The product has no water protection.
IPX1 – IPX4
The product will still operate if exposed to falling or spraying water drops, or splashes.
IPX5 – IPX6
The product can resist jets of low- or high-pressure water, respectively. It can be considered “water resistant.”
IPX7 – IPX8
The product is protected against temporary immersion in water and can be considered “waterproof.”
IPX9
The product can withstand high-pressure and high-temperature water jets.
The Ingress Protection Rating (or IP code) is a system developed by the International Electrotechnical Commission (IEC), a not-for-profit, non-governmental global membership organization. Formed in 1906, the IEC is headquartered in Geneva and currently coordinates the work of more than 20,000 experts in 172 countries.