IP Ratings Explained: What IP65 vs IP67 Actually Means for Outdoor Devices
IP ratings get quoted on every outdoor device spec sheet, but rarely explained. Here's what the numbers actually mean and why they matter for Indian conditions.
How to read an IP rating
An IP rating has two digits — the first is protection against solid particles (dust), the second against liquid ingress (water), each on a scale where higher means better protection. IP65 means fully dust-tight with protection against low-pressure water jets; IP67 means fully dust-tight with protection against temporary submersion in up to a metre of water.
Why this matters more than it might seem
A device rated for indoor use only, installed outdoors through a monsoon season, will fail — not eventually, but predictably, as moisture works into seals and connectors never designed for sustained wet exposure. The gap between an IP54-rated device and an IP66 one is the difference between a camera that survives five monsoons and one that needs replacing after one.
What to check beyond the headline rating
The IP rating on a datasheet applies to the device as tested, which sometimes doesn't account for how it's actually mounted or wired on site — a properly IP66-rated camera with an improperly sealed cable gland can still let water in at that junction. Installation quality has to match the hardware's rating for the protection to actually hold in practice.
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