ISO 5356-1 Figure A.1 Plug and Ring Test Gauges | Conical Connectors for Anaesthetic and Respiratory Equipment

ISO 5356-1 Plug and Ring Test Gauges | Anaesthetic Connectors

The ISO 5356-1 Plug and Ring Test Gauges are precision measuring instruments manufactured by KingPo. They are designed to verify dimensional requirements and interchangeability of conical connectors used in anaesthetic and respiratory equipment, covering key sizes from 8.5 mm to 30 mm (including Figure A.1 for anaesthetic gas scavenging systems).

Technical Parameters

Each gauge is precision-machined from high-hardness steel (HRC 58-62) to deliver superior wear resistance and stable dimensions over thousands of verification cycles. The plug and ring geometries strictly follow ISO 5356-1 specifications with tight tolerances and smooth mirror-finish surfaces (Ra ≤ 0.2 μm). Robust construction and clear reference markings ensure accurate, repeatable go/no-go testing while preventing damage to delicate connectors.

Why Choose KingPo Gauges

• Exceptional Longevity: Manufactured from premium tool steel hardened to HRC 58-62, these gauges deliver up to three times the service life of ordinary economy gauges (typically HRC 20-30) in high-volume quality control and laboratory environments.
• Full Traceability: Each gauge is individually serial-numbered and supplied with an ISO 17025 traceable calibration certificate, providing complete confidence for regulatory audits and third-party certification.
• Superior Consistency: The mirror-finish surface (Ra ≤ 0.2 μm) and precision-machined tolerances significantly reduce connector abrasion while ensuring highly repeatable go/no-go results across thousands of inspection cycles.

Testing Principle

The ISO 5356-1 Plug and Ring Test Gauges work by direct mechanical verification. The plug gauge is inserted into the connector socket, and the ring gauge is applied over the cone to check critical dimensions — including cone angle, major and minor diameters, and effective engagement length. A correct fit within the specified tolerances confirms that the connector meets ISO 5356-1 requirements for secure, leak-resistant, yet easily disconnectable joints essential for safe anaesthetic and respiratory breathing systems.

Common Error Mitigation

For best results, always clean both the gauge and connector surfaces with a lint-free cloth before testing to remove any dust or residue. Apply smooth, consistent axial force without tilting or excessive pressure. Always select the gauge corresponding to the exact connector size and confirm its calibration status prior to use. After testing, return the gauges to their protective cases to prevent surface damage and maintain long-term accuracy.

Primary Use Cases & Business Value

The ISO 5356-1 Plug and Ring Test Gauges play a critical role in ensuring dimensional accuracy and full interchangeability of conical connectors in anaesthetic and respiratory equipment. By precisely verifying cone angle, diameters, and engagement length across the 8.5 mm to 30 mm range (including Figure A.1 for scavenging systems), these gauges help manufacturers minimize leakage risks, prevent accidental disconnections, and eliminate costly assembly mismatches. This results in higher product reliability, smoother regulatory approval, and enhanced patient safety in critical breathing circuits, humidifiers, vaporizers, and anaesthetic gas scavenging systems.

Industrial Applications & Lab Scenarios

• Anaesthetic and Respiratory Equipment Manufacturers — Routine dimensional verification during production and final quality inspection of conical connectors.
• Third-Party Certification Laboratories — Standardized compliance testing according to ISO 5356-1 requirements for market approval.
• R&D Departments — Validation and iterative optimization of new connector designs and materials for better performance and safety.
• Quality Control Teams — Efficient batch inspection and incoming material verification from multiple suppliers.
• Hospital Biomedical Engineering & Maintenance Teams — Periodic field verification of connectors in installed medical equipment fleets to ensure ongoing safety and compliance.

Strategic Procurement Advantages & Global Support

• High-Efficiency Testing: Complete plug and ring sets for rapid verification across standard sizes.
• Certified Manufacturing: ISO 9001/14001/45001 and CE certified with traceable calibration.
• Reliability & Support: Rigorous factory calibration, one-year warranty, on-site guidance, and lifetime technical support.