Want to know the real difference between IP67 and IP68?
Regarding the IEC 60529 industrial protection standard, we have summarized the waterproof depth and immersion time.
To put it simply: IP67 means "no problem with short-term immersion in water", while IP68 means "no problem with long-term immersion in water".
In the selection of industrial equipment (such as industrial switches and sensors), IP rating (Ingress Protection) is a core indicator for measuring the "survivability" of the equipment.
1. The meaning behind the numbers
The first digit "6" indicates dust tightness. This means the equipment completely prevents dust from entering, which is standard in industrial applications.
The second digit "7/8" represents the waterproof rating.
2. The core differences between IP67 and IP68
| characteristic | IP67 (Protective of short-term water immersion) | IP68 (Proof of continuous immersion) |
| definition | The equipment can be submerged in 1 meter of water for 30 minutes without taking in water. | The equipment can be continuously submerged in water at a depth of more than 1 meter for an extended period without taking in water. |
| Soaking time | 30 minutes (time limit) | Ongoing (without a specified time limit) |
| Test Standards | Standardized time: 1 meter, 30 minutes. | Non-standard : The specific depth (e.g., 3 meters, 5 meters) is defined by the manufacturer. |
| Applicable Scenarios | Outdoor environments that are occasionally rained on or briefly flooded. | Environments requiring long-term underwater operations, deep wells, and frequent exposure to high-pressure water. |
Q: Is IP68 necessarily better than IP67?
A: Theoretically yes. But it's important to note that the specific parameters of IP68 are defined by the manufacturer. If the manufacturer states that IP68 means being submerged in 1.5 meters for 1 hour, then it is indeed stronger than IP67; however, when selecting a model, you must check the specific depth specified in the manufacturer's manual.
Q: Can the IP67 operate underwater for extended periods?
A: No. IP67 is only designed for "accidental immersion". For long-term underwater operations, industrial equipment with an IP68 rating must be selected.
