Hikvision products are classified into three levels according to their anti-corrosion performance. Refer to the following description to choose for your using environment.
Level
Top-level protection : Hikvision products at this level are equipped for use in areas where professional anti-corrosion protection is a must. Typical application scenarios include coastlines, docks, chemical plants, and more.
Moderate protection : Hikvision products at this level are equipped for use in areas with moderate anti-corrosion demands. Typical application scenarios include coastal areas about 2 kilometers (1.24 miles) away from coastlines, as well as areas affected by acid rain.
No specific protection : Hikvision products at this level are equipped for use in areas where no specific anti-corrosion protection is needed.