An IP Rating (Ingress Protection Rating), defined by the international standard IEC 60529, is a two-digit code that classifies the degree of protection provided by an enclosure against the intrusion of solid particles (dust) and liquids (water). The first digit (0–6) rates solid particle protection: 0 means no protection, 5 means dust-protected (limited ingress, no harmful deposit), and 6 means dust-tight (no ingress at all). The second digit (0–9K) rates liquid ingress protection: 4 means splash-proof from any direction, 5 means protection against water jets, 7 means submersion up to 1 meter for 30 minutes, and 8 means continuous submersion beyond 1 meter (as specified by the manufacturer). For example, an IP67 device is completely dust-tight and can be submerged to 1 meter for 30 minutes.

In AIDC hardware, IP ratings are critical selection criteria because warehouse, manufacturing, and outdoor environments expose devices to dust, liquids, and accidental drops into puddles or wash-down areas. A general-purpose office barcode scanner like the Honeywell DS2208 may carry an IP42 rating (protected against solid objects >1mm and water dripping vertically)—adequate for a clean retail environment but unsuitable for a food processing plant. By contrast, the Zebra DS3678 rugged handheld scanner carries an IP67 rating, allowing it to survive a rinse under a faucet or brief submersion without damage—essential for grocery distribution or food manufacturing where equipment is regularly sanitized.

Enterprise mobile computers are similarly rated: the Zebra TC72 carries an IP67 rating, while the Zebra MC9300 is IP65-rated (dust-tight, water jet resistant) and MIL-STD-810G certified for shock and vibration. When procuring AIDC hardware for harsh environments, require at minimum IP54 for light industrial use, IP65 for manufacturing and outdoor use, and IP67 or IP68 for food processing, healthcare, or direct water-exposure environments. Never rely solely on the IP rating—also verify the device's drop spec (expressed in feet onto concrete) and operating temperature range for your specific deployment conditions.