IP67 vs IP68 - M16 Waterproof Connector Standards Comparison
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- Issue Time
- Sep 25,2025
Summary
When selecting connectors for outdoor or industrial applications, waterproof rating is one of the most critical considerations. For M16 circular connectors, the most common standards are IP67 and IP68. But what do these ratings mean, and how do they impact real-world performance? In this blog, we will compare IP67 vs IP68 waterproof connector standards, explain how they apply to M16 circular connectors, and share why Connoder’s solutions are trusted worldwide.
IP67 vs IP68 - M16 Waterproof Connector Standards Comparison
Introduction
When selecting connectors for outdoor or industrial applications, waterproof rating is one of the most critical considerations. For M16 circular connectors, the most common standards are IP67 and IP68. But what do these ratings mean, and how do they impact real-world performance? In this blog, we will compare IP67 vs IP68 waterproof connector standards, explain how they apply to M16 circular connectors, and share why Connoder’s solutions are trusted worldwide.
Understanding IP Ratings (IEC Standard)
The IP code (Ingress Protection), defined by the IEC 60529 standard, specifies the degree of protection against dust and liquids:
IP67: Protected from dust and temporary immersion in water (typically 1 m depth, 30 minutes).
IP68: Protected from dust and prolonged immersion beyond 1 m, with test depth and duration defined by the manufacturer.
Source: IEC official guide on IP ratings.
IP67 vs IP68 — Key Differences for M16 Circular Connectors
1. Depth and Duration
IP67 = short-term, shallow immersion (up to 1 m / 30 min).
IP68 = longer immersion, deeper water, but conditions vary by manufacturer.
2. Use Cases
IP67: Outdoor sensors, industrial equipment exposed to rain or washdowns.
IP68: Marine, underground, or applications needing extended water resistance.
3. Cost vs Protection
IP68-rated connectors often require enhanced seals, stronger materials, and thus cost more. If your application never faces deep immersion, IP67 may be sufficient.
M16 circular connector
Connoder M16 circular connector series with IP67/IP68 waterproof performance.
Why “Mated Condition” Matters
Connector datasheets usually state that IP ratings are valid only when connectors are fully mated:
An unmated connector (open side exposed) does not achieve the same waterproof protection.
Always check if the datasheet specifies “mated IP rating.”
Real-World Application Insights
A sensor system in smart agriculture may only need IP67.
A marine monitoring device continuously exposed to water should select IP68.
Two IP68 connectors may not be equal — test conditions differ by manufacturer. Always review datasheets carefully.
Example of M16 circular connector applied in outdoor environments
With its IP67 - level waterproof and dust - proof capabilities, the M16 circular connector breaks through the limitations of outdoor environments on connection reliability, serving as a “safety barrier” for the stable operation of outdoor equipment and systems.
Connoder: Your Trusted Partner for Waterproof M16 Circular Connectors
At Connoder, we specialize in high-performance circular connectors engineered for harsh environments:
M16 Series: Precision O-rings, gasket sealing, and durable housings.
Waterproof Performance: Tested to meet IP67 and IP68 under mated conditions.
Quality Assurance: In-house lab testing simulates immersion, spray, and corrosion.
Applications: Automation, renewable energy, transportation, outdoor electronics.
Visual comparison of IP67 vs IP68 waterproof ratings.
IP67 is the “basic outdoor protection version” of the M16 connector, while IP68 is the “special version for harsh water environments”. The two grades, distinguished by waterproof depth and duration, accurately meet the connection protection requirements of different scenarios.
Choosing the Right Waterproof Rating for Your Project
Ask for datasheet details: Depth, time, and mated/unmated conditions.
Match rating to environment: Occasional splash vs prolonged submersion.
Consult experts: Connoder engineers help customers choose the optimal M16 circular connector waterproof rating for their use case.
Call to Action
If you’re planning a new project or upgrading existing systems, let Connoder provide the IP67/IP68 M16 connectors that guarantee durability and reliability.
👉 Explore our M16 Circular Connector Series: Connoder M16 Products
What does the waterproof rating of an M16 circular connector mean?
The waterproof rating, usually IP67 or IP68, indicates the level of protection against dust and water. IP67 means the connector can withstand temporary immersion up to 1 meter for 30 minutes, while IP68 allows for prolonged immersion at greater depths, depending on manufacturer testing.
What is the difference between IP67 and IP68 M16 circular connectors?
IP67 connectors are designed for short-term water exposure such as rain, splashes, or shallow immersion. IP68 connectors offer extended waterproofing, suitable for marine, underground, or high-humidity environments. The main difference lies in the immersion depth and duration.
Do IP ratings apply to M16 connectors when they are unmated?
No. IP ratings are valid only when the connector is fully mated. An unmated connector with exposed contacts cannot achieve the same level of waterproof protection. Always ensure connectors are properly connected to meet their rated performance.
Where are waterproof M16 circular connectors commonly used?
M16 circular connectors with IP67 or IP68 ratings are widely used in outdoor lighting, renewable energy systems, industrial automation, marine equipment, and smart agriculture applications, where reliability under harsh conditions is critical.
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