Division of IP level
We can often see the indicator IPx1x2（x1:1-6，x2:1-8） in the product introduction, which refers to the dustproof and waterproof level of the product.
The first digit after IP indicates the dust-proof ability, which has six grades.
(1) It can protect more than 50 mm solid particles
(2) It can protect solid particles above 12mm
(3) It can protect solid particles above 2.5mm
(4) It can protect solid particles above 1 mm
(5) It can protect solid particles except dust
(6) It can protect all solid particles, including dust
The second digit after IP represents liquid protection, which has eight levels.
(1) It has protective effect on water injection in vertical state
(2) It has protective effect on water injection at 15 degree angle
(3) It has protective effect on water injection at 60 degree angle
(4) It can protect water injection in any direction
(5) It has protective effect for low pressure water injection in any direction
(6) It can protect high pressure water injection in any direction
(7) Within 30 minutes, it has protective effect in 15cm-1m deep water
(8) It can protect product under long term immersion in 1.5m deep water
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