In complex environments like industrial production or outdoor deployments, the "IP65" or "IP67" ratings found on electronic equipment can often be confusing. These codes are crucial, as they impact not only the device's lifespan but also the stability of the entire system. This article clearly explains the practical meaning behind these Ingress Protection (IP) ratings.

IP65: Protection Against Dust and Water Jets
An IP65-rated device offers complete protection against dust, making it suitable for industrial environments with high dust levels. Regarding water protection, it can withstand low-pressure water jets from any direction. This means in a standard industrial workshop, where nearby equipment might be cleaned with water or where occasional liquid splashes occur, an IP65 device will be adequately protected.
IP67: Enhanced Water Protection
When the rating reaches IP67, the device possesses all the protective features of IP65, with the added ability to withstand temporary immersion. Specifically, an IP67-rated device can survive being submerged in water up to 1 metre deep for 30 minutes without harm. This level of protection is essential for scenarios where accidental immersion is possible, such as during equipment washing, in heavy rain, or in case of sudden leaks.
How to Choose the Right IP Rating?
When selecting an IP rating, consider the following key factors:
Dust concentration in the usage environment is a primary concern. In areas with significant dust, like food processing or woodworking shops, at least an IP6X dust protection rating is necessary.
The likelihood of liquid contact is equally important. If exposure is limited to occasional rain or splashes, IP54 or IP55 might suffice. If the equipment needs to withstand hosing down or potential immersion, IP67 or higher should be chosen.
It's important to note that higher protection ratings usually mean higher device costs. In some cases, improving the equipment's installation environment or adding a protective enclosure might be a more economical solution, allowing you to choose a device with a moderate IP rating.
Important Considerations in Practical Application
IP ratings are determined under specific test conditions. The actual service life can be affected by factors like chemical corrosion or mechanical wear. Furthermore, these ratings are typically validated when the device is in a specific state (e.g., covers closed, ports sealed). If these seals are compromised during daily use, the protection level can be significantly reduced.
Regularly inspecting the condition of seals, keeping ports clean, and following the manufacturer's operating instructions are all essential measures to ensure the device maintains its protective capabilities.