Outdoor Nitrogen Dioxide Sensor – ES101NO2
Our NO₂ sensing technology is designed to support both urban environmental intelligence and industrial safety monitoring.
The ES101NO2 enables continuous, real-time detection of nitrogen dioxide in outdoor and semi-industrial environments, helping cities and factories maintain safer, cleaner, and smarter operations.

Smart City & Service Applications
In smart city deployments, NO₂ is one of the key indicators of air pollution generated by traffic, power plants, and urban infrastructure.
The ES101NO2 provides stable and accurate NO₂ data to support:
- Urban air quality monitoring stations
- Smart environmental management platforms
- Traffic pollution analysis and control
- Public health and safety services
With RS-485 Modbus communication and optional NB-IoT gateway connectivity, real-time data can be transmitted to cloud platforms for visualization, reporting, and long-term environmental analysis.
Smart Factory Applications
Within industrial environments, NO₂ can be produced by combustion processes, chemical reactions, and heavy machinery.
The ES101NO2 enhances smart factory operations by enabling:
- Continuous NO₂ safety monitoring
- Early warning systems for hazardous gas exposure
- Integration with factory automation and SCADA systems
- Predictive maintenance and compliance reporting
Its low power consumption, fast response time, and industrial-grade enclosure make it suitable for harsh operating conditions in modern smart factories.

Core Technology Highlights
- Wide NO₂ Measurement Range
Up to 2000 ppm with high reliability and long-term stability - Industrial Communication Standard
2-Wire RS-485 with Modbus RTU for easy system integration - Smart Connectivity Ready
Optional NB-IoT gateway for remote monitoring and cloud-based management - Rugged Outdoor Design
IP54 protection, anti-dust, water-resistant, flame-retardant housing
Enabling Smarter Environments
By combining environmental sensing, industrial communication, and cloud-ready architecture, the ES101NO2 bridges the gap between Smart City services and Smart Factory intelligence—delivering actionable data where safety, sustainability, and operational efficiency matter most.
