Monitoring complex tunnel environments

Ensuring safety underground demands constant vigilance and split-second decision-making to mitigate severe environmental hazards. Tunnel operators globally face critical safety challenges, including extreme heat, sudden smoke emissions, hazardous gas accumulation, and unpredictable shifts in airflow and lighting.

For over two decades, Acoem has equipped engineering teams, EPC contractors, and transport authorities to navigate these operational challenges seamlessly. From deep sub-sea channels to high-altitude terrains, our field-proven monitoring solutions deliver actionable, real-time environmental data from day one.

Global tunneling footprints

Continents

Countries

Product installations

Tailored monitoring for every tunnel landscape

Built on reliable hardware and real-time telemetry, Acoem’s monitoring solutions are customised to meet the strict demands of diverse infrastructure setups:

Urban tunnels: High-density traffic and continuous congestion require immediate detection of carbon monoxide (CO) and nitrogen oxides (NOx) to maintain public health compliance and trigger automated ventilation systems.
Extreme environments: Sub-sea passages, high-altitude mountain corridors, and remote rail tunnels demand ruggedised hardware that performs reliably under extreme pressure, humidity, and temperature variations.
Semi-urban & regional: High-speed transitions from open highways to confined spaces create lighting and visibility hazards, requiring precise illuminance adjustments at tunnel portals.

By integrating reliable hardware with real-time data, Acoem helps keep your tunnels safe and fully compliant.

Brochure

Navigating Tunnel Environments

Tunnel monitoring ecosystem

Monitoring environmental parameters in isolation creates dangerous operational Blind spots. Acoem’s unified monitoring ecosystem connects scattered metrics into a single SCADA-compatible control view, enabling operators to coordinate fast, reliable emergency responses while maintaining audit-ready regulatory records.

Multi-sensor data capture

The data is continuously gathered from specialised field sensors stationed throughout the tunnel:

Airflow monitoring: Tracks real-time air velocity and direction.
Gas monitoring: Measures CO, NOx, and particulate matter.
Visibility monitoring: Uses optical extinction measurement to check for haze and smoke.
Luminance & illuminance: Assesses light transitions at portals and deeper tunnel interiors.
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Global standards. Trusted quality.

Certified to global CE and ISO 9001 standards, our tunnel products are engineered to align with recognised international safety and quality benchmarks.

Every system undergoes established testing protocols designed to support consistent operation under challenging environmental conditions. This process-focused approach helps operators meet regulatory compliance requirements and support long-term asset management strategies.

Unified intelligence

Instead of dealing with isolated data streams, dedicated processing units (such as CTU, TSCU, and TSCU-R units) act as a single hub. They are engineered to centralise all parameters into one SCADA-ready integration point, making it easier for operators to oversee the entire system from a single interface.

Automated demand response

Once the data is centralised, the system aims to communicate directly with your existing infrastructure to drive smart, automated adjustments:

Intelligent ventilation: Airflow and gas data help control jet fans dynamically, running them only when demand requires.
Adaptive lighting: Luminance data helps eliminate dangerous light transition zones at portals by adjusting tunnel lights in real time.
Traffic control: Visibility metrics can link directly with traffic management systems to flag potential hazards immediately.

Tunnel refurbishment, upgrades, and retrofits

Tunnel infrastructure requires routine maintenance and major periodic overhauls. Standard compliance frameworks mandate that every 10 years, tunnel operators perform systematic upgrades across auxiliary systems including field sensors, luminaires, SCADA controllers, fire detection systems, and environmental instrumentation.
Acoem’s engineering team collaborates directly with operators, system integrators, and EPC contractors to design customised sensor layouts tailored to your specific bore geometry, traffic load, and ventilation scheme.

Why partner with Acoem for retrofit projects?

Turnkey hardware integration: Direct compatibility with existing industrial control networks and SCADA protocols.
Minimal operational disruption: Modular sensor units designed for rapid installation during scheduled maintenance windows.
Long-term calibration stability: Low-maintenance field hardware built to withstand harsh chemical and particulate exposure.

Peace of mind for every tunnel phase

Choosing a tunnel monitoring system is a significant commitment. Operators must maintain safety and compliance, whilst EPC contractors require reliable integration and delivery. We support your team from the initial design phase through decades of operation, providing a connected system that unifies airflow, visibility and gas metrics.

With automated data tracking and comprehensive lifecycle support including calibration, technical assistance and simple upgrades, our solutions ensure your infrastructure remains efficient, compliant and protected for the future.

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