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1.Tunnel Nitrogen Oxides Detector Product Overview
Tunnel Nitrogen Oxides Detector supports simultaneous measurement of both nitrogen dioxide and nitric oxide, covering the full range required for routine tunnel ventilation management and emergency monitoring of sudden accidents.Tunnels are special tubular structures. Due to their small size and enclosed nature, vehicles passing through tunnels emit large amounts of toxic and harmful gases. If these gases are not promptly and properly released, they can cause excessive levels of nitrogen oxides (NOx) and other toxic gases, potentially seriously endangering the safety of personnel and vehicles within the tunnel. Tunnel Nitrogen Oxides Detector is a gas environment monitoring device specifically designed for tunnel environments. It can accurately and in real-time detect the concentrations of nitrogen dioxide (NO₂) and nitric oxide (NO) within the tunnel, as well as monitor temperature and humidity. By monitoring NOx levels around the clock, it allows for timely activation of forced ventilation fans, ensuring driving safety. The tunnel NOx detector employs a high-sensitivity sensor and a waterproof housing design, enabling stable operation even in harsh tunnel conditions. It collects NOx levels online, meeting the requirements of the "Highway Tunnel Ventilation and Lighting Design Specifications," providing reliable data support for tunnel construction, operation, and emergency response, and reducing the hazards of toxic gases within tunnels.
2.Tunnel Nitrogen Oxides Detector Product Function Introduction
NOx and Environmental Element Monitoring
Continuously measures the content of NO, NO2, and other gases in tunnels online, and detects tunnel temperature and humidity.
Automatic Zero-Point Calibration
Features zero-point tracking self-calibration and temperature compensation, ensuring accurate and reliable sensor data.
24/7 Online Monitoring
Achieves real-time continuous monitoring of harmful gas concentrations and ambient temperature and humidity in tunnels.
Standardized Industrial Interface
Integrates an RS485 communication interface and a 4~20mA analog output interface, supporting remote data transmission and management.
Flexible System Linkage Capability
Provides multiple expansion interfaces, enabling linkage with alarm systems and other systems for unified intelligent management.
3.Tunnel Nitrogen Oxides Detector Product Features
The instrument adopts an integrated structural design, making it compact and small, with small sensor size for easy installation;
Specifically designed for harsh tunnel environments;
Low power consumption design ensures stable and reliable operation;
The instrument has lightning protection measures, with both its communication and power interfaces featuring lightning protection design to minimize damage from lightning strikes.
4.Tunnel Nitrogen Oxides Detector Key technical indicators
| Measurement range | NO2:0~20ppm;NO:0~100ppm |
| Resolution | 0.1ppm or 1%FSD |
| Measurement accuracy | 0.1ppm or ≤5% (25℃) |
| Output interface | 1 channel RS485 digital interface; 4 channel 4~20mA analog output; 4 channel relay output interface; alarm indication output interface; |
| Supply voltage | 90V~306VAC and 9V~36VDC |
| Working temperature | -40℃~50℃ |
| Working humidity | 15%~95%RH |
| Dimensions | 293*187*90mm |
| Waterproof grade | IP65 |
| Installation method | Wall-mounted |