The Clarity Multi-Gas Module expands the capabilities of the Node-S, enabling real-time measurement of CO, O₃, NO₂, NO, and NOx — five key pollutants that impact air quality and public health. Whether monitoring urban pollution, industrial emissions, or transportation corridors, this compact, all-in-one sensor provides high-quality data without the complexity of multiple instruments.
Designed for effortless deployment, the Multi-Gas Module features a weatherproof, UV-resistant enclosure and modular mounting for quick installation on both vertical and horizontal poles. With Clarity’s plug-and-play Add-On Module design, the Multi-Gas Module leverages the solar-powered operation and built-in cellular connectivity of the Node-S — even when paired with the Wind Module.
Multi-Gas Module use cases
CO and wildfires
- CO is a by-product of combustion, emitted by both wildfires and urban sources
- Wildfires produce significantly more PM2.5 per unit of CO than urban sources
- The PM2.5-to-CO ratio helps distinguish wildfire smoke from urban pollution.
NOₓ and traffic
- High NO and NO₂ levels identify traffic-related pollution hotspots
- A higher NO-to-NO₂ ratio indicates fresh emissions near the source, while a lower ratio suggests chemical transformation as the air moves further away.
O₃ non-attainment and smog formation
- Quantify diurnal pattern of NOx (morning, evening peaks) and O3 (afternoon peak)
- Elevated NOₓ and O₃ together signal strong photochemical activity and smog formation.
