IP67 vs IP68 Circular Connectors
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- Issue Time
- Jun 8,2026
Summary
When evaluating a connector waterproof rating, one of the most common questions engineers ask is:
Should I choose an IP67 or IP68 circular connector?
While both ratings provide excellent protection against dust and water ingress, selecting the wrong protection level can increase project costs or reduce long-term reliability. This guide explains the key differences between IP67 and IP68 circular connectors and helps you choose the best solution for your application.
IP67 vs IP68 Circular Connectors
Introduction
When evaluating a connector waterproof rating, one of the most common questions engineers ask is: Should I choose an IP67 or IP68 circular connector? While both ratings provide excellent protection against dust and water ingress, selecting the wrong protection level can increase project costs or reduce long-term reliability. This guide explains the key differences between IP67 and IP68 circular connectors and helps you choose the best solution for your application.
Circular Connectors
Rugged, compact and versatile — ideal when you need mixed power & signal plus environmental protection.
What Is a Connector Waterproof Rating?
A connector waterproof rating indicates how effectively a connector resists the ingress of dust and water under standardized testing conditions. The most widely recognized standard is IEC 60529, which defines the Ingress Protection (IP) Rating System.
| IP Rating Format | Meaning |
| First Digit | Protection against solid particles and dust |
| Second Digit | Protection against water ingress |
Understanding IP67 Waterproof Connectors
IP67 connectors are designed to withstand temporary immersion in water and are commonly used in industrial environments where equipment may be exposed to rain, washdowns, or temporary flooding.
Standard Test Conditions
Water depth: up to 1 meter
Duration: up to 30 minutes
No harmful water ingress allowed
Typical IP67 Applications
Factory automation systems
Industrial sensors
M8 and M12 field devices
Packaging equipment
AGV vehicles
Building automation systems
Understanding IP68 Waterproof Connectors
IP68 connectors are designed for applications where long-term water exposure is expected. Unlike IP67, the exact testing conditions for IP68 are defined by the manufacturer.
Typical IP68 Applications
Marine electronics
Offshore energy systems
Underwater monitoring equipment
Water treatment facilities
Underground installations
Renewable energy projects
IP67 vs IP68 Circular Connectors: Side-by-Side Comparison
Connoder is a professional circular connector manufacturer dedicated to delivering high-quality connectivity solutions for consumer and industrial applications. With strong engineering expertise and strict quality control, Connoder supports customers from product selection to customized design.
| Feature | IP67 Connector | IP68 Connector |
| Dust Protection | IP6X | IP6X |
| Water Protection | Temporary Immersion | Continuous Immersion |
| Water Depth | Up to 1 Meter | Beyond 1 Meter |
Cost | Lower | Higher |
Key Takeaway: IP68 is not automatically better. The right choice depends on your actual application environment and waterproof requirements.
How Waterproof Circular Connectors Achieve Their Protection Rating
O-Ring Sealing Technology
Precision-engineered O-rings create a waterproof barrier between mating surfaces and prevent water ingress.
Threaded Coupling Mechanisms
Thread-lock designs maintain sealing pressure even in high-vibration industrial environments.
Overmolded Cable Assemblies
Integrated cable molding reduces potential leakage points and improves long-term durability.
How to Select the Right Waterproof Rating
Will the connector be submerged?
How long will water exposure last?
Will the equipment be installed outdoors?
Is the application mission-critical?
What are the maintenance requirements?
Why Engineers Choose CONNODER Waterproof Circular Connectors
As a professional manufacturer of industrial connectivity solutions, CONNODER specializes in waterproof circular connectors, cable assemblies, and customized wiring solutions for demanding industrial applications.
With more than 10 years of experience, CONNODER integrates research and development, manufacturing, sales, and technical support to provide reliable connectivity products for customers worldwide.
Product Portfolio
M5 Circular Connectors
M8 Circular Connectors
M9 Circular Connectors
M12 Circular Connectors
M16 Circular Connectors
7/8" Circular Connectors
Custom Cable Assemblies
Industrial Wiring Harnesses
Industries Served
Industrial Automation
Robotics
Renewable Energy
Transportation Systems
Communication Equipment
Smart Manufacturing
Building Automation
Frequently Asked Questions
Is IP68 always better than IP67?
No. IP67 is often sufficient for most industrial automation applications and can be more cost-effective.
Can IP67 connectors be used outdoors?
Yes. IP67 connectors are commonly used in outdoor installations exposed to rain, dust, and washdowns.
Are M12 connectors available in both IP67 and IP68 versions?
Yes. Many industrial M12 connector series are available with either protection rating depending on the application.
How can I verify a connector's waterproof rating?
Request certification reports, testing documentation, and technical specifications from the manufacturer.
Looking for Reliable Waterproof Circular Connectors?
CONNODER provides IP67 and IP68 circular connectors, industrial cables, and customized connectivity solutions designed for harsh industrial environments. Whether you need standard products or OEM/ODM development support, our engineering team is ready to assist your next project.
What is the difference between IP67 and IP68 circular connectors?
The main difference between IP67 and IP68 circular connectors is their level of water resistance. IP67 connectors can withstand temporary immersion in water up to 1 meter for 30 minutes, while IP68 connectors are designed for continuous immersion beyond 1 meter under conditions specified by the manufacturer. Both ratings provide complete protection against dust ingress.
Is IP68 always better than IP67 for industrial applications?
Not necessarily. IP68 offers higher water resistance, but it is not always required. For most industrial automation, factory equipment, and outdoor installations exposed to rain or washdowns, IP67 connectors provide sufficient protection. IP68 connectors are typically recommended for marine, underwater, or long-term submerged applications.
How do I choose the right connector waterproof rating?
To choose the right connector waterproof rating, consider the environmental conditions of your application. If the connector may encounter temporary water exposure, IP67 is often suitable. If the connector will operate underwater or in continuously wet environments, IP68 is the better choice. Other factors such as vibration, temperature, and chemical exposure should also be considered.
What industries commonly use IP67 and IP68 circular connectors?
IP67 and IP68 circular connectors are widely used in industrial automation, robotics, renewable energy systems, transportation equipment, communication infrastructure, marine electronics, water treatment facilities, and outdoor monitoring systems. These industries require reliable waterproof connectivity to ensure stable signal and power transmission.
M16 6 Pin Circular Connector A-Code Interface, Waterproof Connector Receptacle Cable, Straight, Front-Locking, Unshielded
M16 6 Pin Circular Connector assemblies are ideal for demanding industrial applications such as industrial automation and aerospace, marine, and telecom systems.
M16 6 Pin Circular Connector are ideal for demanding industrial applications such as industrial automation and aerospace, marine, and telecom systems. M16 Circular Connector are available in quick-lock wiring assembly types with IP67 protection and a vibration-resistant screw design.
M16 6 Pin Circular Connector are ideal for demanding industrial applications such as industrial automation and aerospace, marine, and telecom systems. M16 Sensor connector are available in quick-lock wiring assembly types with IP67 protection and a vibration-resistant screw design.