Smart City Underground Infrastructure Projects: Gas Safety Monitoring in Confined Spaces
- Sysinno Technology
- 2 days ago
- 4 min read
Successful Story | Underground Infrastructure Project
Introduction | Critical Safety Challenges in Underground Infrastructure Projects
As cities continue to urbanize and invest in smart mobility, underground infrastructure has become a core component of modern smart city development. However, underground tunnels and utility chambers are classified as confined spaces, where limited ventilation can lead to the buildup of hazardous gases—posing significant risks to both construction crews and maintenance personnel.
To meet the stringent safety requirements of large-scale infrastructure projects, the client deployed the iGasis1 gas detector to establish a gas safety monitoring system fully integrated with their existing industrial control systems.
Project Challenges | Gas Monitoring & System Integration in Large-Scale Underground Projects
Smart city underground infrastructure projects present several critical challenges:
Poor ventilation in underground tunnels can allow hazardous gases to accumulate.
Workers must enter confined spaces for construction and inspection, increasing safety risks.
Traditional gas detection devices often lack long-term monitoring capabilities and centralized alarm management.
The system must integrate seamlessly with existing industrial control systems.
Distributed sites require a highly reliable and maintainable sensing architecture.
Solution | Integrating the iGasis1 Industrial Gas Detector with Control & Monitoring Systems
We deployed the iGasis1 industrial-grade gas detector as a field sensing node throughout the underground project site. Using standard industrial signal interfaces, the system was seamlessly integrated into the client’s existing control and monitoring infrastructure—creating a centralized gas safety monitoring framework designed for confined-space operations.
1) Real-Time Gas Monitoring & Proactive Alerts
The iGasis1 can be configured to detect critical gases such as oxygen (O₂), carbon monoxide (CO), methane (CH₄), hydrogen sulfide (H₂S), and carbon dioxide (CO₂), depending on project requirements.
It provides:
Continuous real-time concentration monitoring
Immediate abnormal condition alerts
Early warning capabilities to prevent hazardous exposure
2) Industrial-Grade Communication & Safety Interlock Integration
The iGasis1 supports standard industrial output interfaces, allowing direct integration into existing engineering control architectures:
4–20 mA Analog Output – Industry-standard sensor signal
RS485 (Modbus RTU) – Industrial communication protocol for reliable data transmission
Dry Contact Output – For alarm and control system activation
Alarm Interlock Function – Automatically triggers ventilation systems or audible/visual alarms
This architecture integrates seamlessly with PLC and SCADA systems, meeting the safety interlock requirements typically mandated for confined-space underground engineering projects.
3) System Architecture | Industrial OT Framework for Underground Safety Monitoring
Solution Architecture
The 1st layer：Field Layer
iGasis1 gas detectors installed in underground tunnels and confined spaces
Continuous monitoring of gas concentration and environmental conditions
Acts as the frontline sensing node for hazard detection
The 2nd layer：Control Layer
Collects 4–20 mA or RS485 sensor signals
Integrates with ventilation systems, alarm systems, and safety control devices
Executes automated safety responses through interlock logic
The 3rd layer：Supervisory Layer
Centralized monitoring through SCADA or Building Management Systems (BMS)
Alarm management and event logging
Historical data tracking and analytics
Cross-site centralized management and maintenance decision support
OT (Operational Technology) refers to the industrial control systems and field-level technologies used to monitor and manage physical equipment and infrastructure operations.
Results | Enhancing Safety and Operational Efficiency in Underground Projects
Following the deployment of the iGasis1, the project team successfully established a comprehensive gas safety monitoring framework for underground operations, delivering the following measurable benefits:
Improved Confined-Space Safety
Real-time gas detection combined with automated alarm interlocks significantly reduces operational risk in underground and confined-space environments.
Hazardous conditions are identified immediately, enabling faster response and preventing potential incidents before they escalate.
Centralized Monitoring & Event Management
By integrating with the supervisory control platform, management teams can centrally monitor gas safety conditions across underground tunnels and utility spaces. This ensures full visibility, streamlined alarm handling, and comprehensive event tracking from a single control interface.
Reduced Manual Inspection Burden
With automated monitoring and alert mechanisms in place, the need for routine manual inspections in high-risk areas is greatly reduced. This not only improves worker safety but also optimizes manpower allocation and operational efficiency.
Enabling Long-Term Smart Infrastructure Deployment
The iGasis1 now serves as a critical smart sensing node within the underground infrastructure ecosystem. It supports long-term deployment strategies aligned with smart transportation initiatives and broader urban digital transformation goals—strengthening the foundation for resilient, future-ready city infrastructure.
iGasis1 | The Preferred Gas Monitoring Solution for Government Tenders & Critical Infrastructure Projects
The iGasis1 has been successfully deployed in underground infrastructure and confined-space safety projects, helping engineering teams build monitoring systems that meet stringent occupational safety and regulatory standards.
Key advantages include:
Industrial-standard signal interfaces fully aligned with OT (Operational Technology) architectures
Direct integration with PLC, SCADA, and BMS platforms
Support for safety interlock controls, including ventilation systems, alarm systems, and access control
Designed for long-term infrastructure deployment and maintainability
Fully compatible with smart infrastructure and smart city sensing frameworks
With its industrial-grade reliability and seamless system integration capabilities, the iGasis1 is a trusted choice for public-sector tenders and large-scale infrastructure developments where safety, compliance, and operational continuity are non-negotiable.
Conclusion | Building Safer, Smarter Underground Transportation Infrastructure
Underground development is a cornerstone of any smart city strategy—and gas safety monitoring in confined spaces is a critical component that cannot be overlooked.
By integrating the iGasis1 industrial-grade gas detector with existing control and monitoring systems, the project team successfully established a highly reliable underground safety monitoring framework. This approach delivers enhanced protection for large-scale urban infrastructure while meeting rigorous safety and compliance standards.
We remain committed to delivering industrial-grade sensing and system integration solutions that empower government agencies, infrastructure contractors, and system integrators to build environments that are safe, intelligent, and sustainable.
If you are planning an underground project, tunnel system, smart transportation initiative, or confined-space safety deployment, contact us to learn how the iGasis1 can support your tender requirements and system integration goals.
e-mail: service@sysinnotec.com
