RS485 Air Quality Sensor – CO₂, PM2.5 & PM10 Weather-Proof Environmental Monitor

This RS485 air quality sensor is engineered for accurate, continuous outdoor monitoring of CO₂, PM2.5, and PM10 particulate concentrations. Using a combination of NDIR infrared technology for CO₂ and high-precision laser scattering for particulate matter, it delivers stable, real-time environmental data suitable for meteorology, smart city deployments, agriculture, and industrial environmental monitoring.

A weather-proof radiation shield protects the sensing elements from UV exposure, direct sunlight, and rain, ensuring measurement stability and preventing sensor drift caused by environmental stress. Internal temperature compensation improves CO₂ accuracy across varying conditions, while the laser-based PM sensors capture fine particles with high resolution down to 1 μg/m³.

Designed for integration into RS485/Modbus systems, this sensor connects easily to weather stations, data loggers, PLCs, and IoT gateways. With a wide supply voltage range, low power consumption, and multi-parameter sensing, it offers a robust, long-life solution for comprehensive outdoor air-quality monitoring.

CO₂ Sensor (NDIR)

• Range: 0–5000 ppm

• Accuracy: ±3% F.S @ 25°C

• Resolution: 1 ppm

• Operating Temperature: 0°C to 50°C

• Operating Humidity: 0–95% RH (non-condensing)

• Technology: NDIR with internal temperature compensation

PM2.5 / PM10 Sensor (Laser Scattering)

• Range: 0–1000 μg/m³

• Accuracy: ±3% F.S @ 25°C

• Resolution: 1 μg/m³

• Operating Temperature: –30°C to 50°C

• Operating Humidity: 15–80% RH (non-condensing)

• Technology: Laser beam scattering

Electrical

• Power Supply: DC 7–24 V

• Interface: RS485

• Power Consumption: ~50 mA @ 12 V

• Preheat Time: ~3 minutes