TSRAI NANOZ MEMS MOX sensors deliver real-time CO, NO₂, and visibility monitoring for demand-controlled ventilation — combined with TSR differential pressure, temperature and humidity measurement for complete tunnel and chimney solutions. Achieve 40-60% energy savings while ensuring instant fire detection and evacuation safety.
Tunnels are critical infrastructure requiring continuous air quality monitoring, fire detection, and energy-efficient ventilation control
From highway tunnels to metro systems and industrial stacks — NANOZ sensors ensure safety and efficiency
Highway & Urban Traffic Tunnels
Mainline & High-Speed Rail
Underground Mass Transit
Underground Mining Operations
Stack Emission Monitoring
Underground & Multi-Story
Tunnels present unique hazards requiring reliable gas detection, fire warning, and emergency response systems
Odorless, colorless poison from vehicle exhaust. Limits: 30 ppm (15 min), 100 ppm (1 min). Causes headaches, confusion, death at high levels.
Diesel exhaust irritant. Limits: 1 ppm TWA. Causes respiratory damage, reduced visibility (brown haze), smog formation.
Vehicle fires reach 1000°C+ in minutes. Smoke is primary killer — visibility drops to zero, toxic gases (HCN, HCl) released from burning materials.
Li-ion batteries release HF (hydrogen fluoride), HCN, and electrolyte vapors. Invisible, odorless, lethal. Burns 3-5x longer, 72h re-ignition risk. Critical firefighter hazard.
Petrol vapors, LPG, CNG accumulate at floor level. Heavy gases pool in low points. NANOZ floor-level sensors detect before explosive limits reached.
Soot and particles from diesel vehicles. VI coefficient >0.005 m⁻¹ triggers ventilation. Critical for safe driving and evacuation.
24/7 measurement of CO, NO₂, LEL, HF, visibility, and fire gases at 100-200m intervals. Floor + ceiling sensors. No blind spots.
Pre-alarm, alarm, and emergency levels trigger graduated response: ventilation boost, traffic control, full evacuation.
Real-time HF and toxic gas concentrations for incident commanders. PPE requirements, safe approach zones, re-ignition monitoring.
Direct PLC/SCADA integration for automatic fan speed adjustment. Fire mode: smoke extraction, evacuation support.
SIL 2 ready system design with dual sensors, fail-safe outputs, and self-diagnostics. 99.9% system availability.
NANOZ sensors enable traffic-adaptive ventilation — running fans only when needed saves massive energy while maintaining safety
Reduction in ventilation energy through real-time air quality-based fan control
Early fire warning through smoke and combustion gas detection before flames visible
Predictive ventilation algorithms optimize fan operation based on traffic patterns and weather
Beyond gas detection — integrated tunnel and chimney monitoring with Swiss precision instrumentation
NANOZ sensors detect fire signature gases before visible flames — critical seconds for evacuation and emergency response
NANOZ floor-level sensors detect explosive gases before ignition — plus specialized EV battery fire detection for firefighter safety
Heavy explosive gases sink to the floor and accumulate in low points. NANOZ sensors mounted at ground level detect LEL (Lower Explosive Limit) before dangerous concentrations build up.
Lithium-ion battery fires (thermal runaway) release extremely toxic gases that are invisible and odorless. NANOZ detection is critical for firefighter safety during tunnel incidents.
TSRAI NANOZ MEMS MOX sensors provide continuous emission monitoring (CEMS) for industrial chimneys, boilers, and combustion systems
Based on 2 km bi-directional road tunnel with jet fan ventilation system
20-30 NANOZ sensor nodes at 100m intervals plus portal and emergency station coverage
TSRAI NANOZ MEMS MOX sensors engineered for harsh tunnel conditions: dust, humidity, vibration, and temperature extremes
-25°C to +70°C operating range, IP66/67 enclosures, vibration resistant mounting. Designed for tunnel airflow, dust, and diesel exhaust.
T90 <10 seconds for fire detection gases. Critical for early warning where every second counts for evacuation and response.
Single sensor array detects CO, NO₂, visibility, and fire gases. AI-powered pattern recognition eliminates cross-sensitivity errors.
4-20mA, Modbus RTU/TCP, PROFIBUS for seamless connection to tunnel SCADA and ventilation control systems.
Safety Integrity Level 2 ready design with redundant sensors, self-diagnostics, and fail-safe outputs for life safety applications.
NANOZ solutions help operators comply with tunnel safety directives and industrial emission standards
2004/54/EC minimum safety requirements for tunnels in the Trans-European Road Network
Richtlinien für die Ausstattung und den Betrieb von Straßentunneln — ventilation and safety
Swiss Federal Roads Office tunnel ventilation and safety system requirements
Standard for Road Tunnels, Bridges, and Other Limited Access Highways (USA)
Industrial Emissions Directive and Best Available Techniques for chimney monitoring
Functional safety standards for safety-related systems in tunnels
Gas detectors for car parks and tunnels — performance requirements
Quality assurance for automated measuring systems — CEMS certification