GB 16808-2025 in English

In-Depth Analysis of Core Technical Requirements

Overall System Performance Requirements

The controller must have a low-limit alarm or a two-stage low-limit and high-limit alarm function, with an alarm response time of no more than 10 seconds. The newly added multi-detector confirmation function requires the controller to enter the alarm state only after receiving two or more alarm signals, effectively reducing the false alarm rate.

Power System Specifications

The main power supply uses 220V 50Hz AC. Lithium cobalt oxide and ternary lithium batteries are expressly prohibited for backup power. The power conversion device must ensure that switching between the main and backup power sources does not affect the normal operation of the controller. The backup power supply must provide power for 1 hour + 30 minutes of alarm when in monitoring mode.

Environmental adaptability requirements

Safety Performance and Electromagnetic Compatibility

Electrical Safety Indicators

Insulation resistance must be no less than 100MΩ, leakage current must be limited to 0.5mA, and electrical strength must withstand 1250V AC voltage for 60 seconds without breakdown.

Electromagnetic Compatibility Performance

The controller must pass multiple electromagnetic compatibility tests, including RF electromagnetic field immunity, electrostatic discharge immunity, and surge immunity, to ensure stable operation in complex electromagnetic environments.

Operation Authority and Security Management

The standard divides controller operations into three levels to ensure system security:

Note: P-Prohibited; O-Optional; M-Operable by personnel at this level

Inspection Rules and Quality Assurance

Factory Inspection Requirements

Before leaving the factory, products must undergo 10 inspections, including inspection of major components, alarm function test, insulation resistance test, etc., to ensure that each controller meets standard requirements.

Type Inspection Conditions

Type inspection must be conducted in 6 situations: new product finalization, production process changes, changes to standard technical requirements, and resumption of production after one year of suspension, etc., to fully verify product performance.

Implementation Recommendations and Industry Impact

Design and Manufacturing Recommendations

Manufacturers should focus on key aspects such as casing material selection, backup power supply configuration, and communication interface design. Non-metallic casings must pass the combustion performance test in Appendix A to ensure the material's flame retardancy.

Engineering Application Guidance

In industrial and civil building applications, controllers with appropriate protection levels should be selected based on the operating environment, and system capacity should be reasonably configured to ensure that the backup power supply meets actual needs.

Maintenance and Management Requirements

Establish a comprehensive maintenance and management system, regularly check the controller's operating status, and promptly update software versions to ensure long-term stable operation of the system.

Technology Development Trend Outlook

With the development of Internet of Things technology, combustible gas alarm controllers will develop towards intelligence and networking in the future. Their integration with fire control systems will be further improved, providing more comprehensive protection for building safety.

The implementation of GB16808-2025 will promote industry technology upgrades, improve the overall level of combustible gas detection equipment in China, and provide solid technical support for industrial production safety and civil building safety.