AirGradient Open Air Quality Monitor

A weatherproof outdoor air quality monitor that measures PM1, PM2.5, PM10, CO₂, TVOCs, NOx, temperature, and humidity. Built with high‑grade sensors, open‑source firmware, and flexible data connectivity. Mountable on walls or poles.

How It Works:

• [PM1 / PM2.5 / PM10 Monitoring]: Uses the Plantower PMS5003T laser sensor for accurate particulate readings.
• [CO₂ Monitoring Outdoors]: SenseAir S8 NDIR sensor detects local emission sources that may not produce visible particles — rare in outdoor monitors.
• [TVOCs & NOx Monitoring]: Sensirion SGP41 provides advanced gas detection for traffic pollution, combustion by‑products, and chemical emissions.
• [Temperature & Humidity]: Tracks environmental conditions for complete outdoor air profiling.
• [Weatherproof ASA Enclosure]: UV‑protected, durable, and engineered for accurate airflow and minimal condensation.
• [Open‑Source Firmware]: Modify, extend, or integrate the device however you like.
• [Flexible Data Streaming]: Send data to Home Assistant, AirGradient’s platform, or any custom server.
• [Secure Mounting]: Install on walls or poles using screws or stainless‑steel zip ties, with an anti‑theft screw.

A Top Pick For:

• [Homes]: Track outdoor pollution before it enters your home.
• [Schools]: Monitor playground and roadside air quality.
• [Offices]: Identify ventilation needs and outdoor pollution spikes.
• [Commercial Sites]: Traffic, industrial, or construction monitoring.
• [Smart Home Users]: Full integration with Home Assistant.

Why We Like It:

• [CO₂ Outdoors]: Very few outdoor monitors include CO₂ — this one does.
• [Eight Key Metrics]: PM1, PM2.5, PM10, CO₂, TVOCs, NOx, temperature, humidity.
• [Open‑Source Freedom]: Modify firmware, add sensors, or build custom dashboards.
• [Weatherproof & Durable]: ASA enclosure resists UV, rain, and temperature swings.
• [Flexible Data Use]: Send data anywhere — no locked ecosystem.

Care And Maintenance

• [Keep Vents Clear]: Ensure airflow is unobstructed for accurate readings.
• [Check Mounting Screws]: Tighten periodically, especially after storms.
• [Firmware Updates]: Apply AirGradient’s open‑source updates for improvements.
• [Avoid Direct Water Jets]: Weatherproof, but not designed for pressure washing.
• [Pair With Indoor Monitor]: Compare indoor vs outdoor pollution sources.