AirGradient ONE Indoor Air Quality Monitor

The AirGradient ONE (Model I‑9PSL) is a professional‑grade indoor air quality monitor that measures PM1, PM2.5, PM10, CO₂, TVOCs, NOx, temperature, and humidity. With a built‑in LED status bar, onboard display, open‑source firmware, and native Home Assistant/Homey support, it delivers accurate, real‑time air quality insights for homes, offices, classrooms, and commercial spaces. How It Works: [PM1 / PM2.5 / PM10 Monitoring]: Uses the Plantower PMS5003T laser sensor for precise particulate readings. [CO₂ Monitoring]: SenseAir S8 NDIR sensor detects CO₂ levels and identifies ventilation issues. [TVOC & NOx Monitoring]: Sensirion SGP41 provides advanced gas detection for chemicals, odours, and combustion by‑products. [Temperature & Humidity]: Built‑in sensors track comfort and environmental stability. [LED Status Bar]: Colour‑coded air quality indicator visible across the room. [Onboard Display]: Shows real‑time readings without needing an app. [Open‑Source Firmware]: Modify, extend, or integrate the device however you like. [Home Assistant & Homey Support]: Native integration for smart home automation. [Flexible Data Use]: Send data to any server, including AirGradient’s platform or your own. A Top Pick For: [Smart Homes]: Native Home Assistant/Homey support + open‑source flexibility. [Schools & Offices]: CO₂ + PM monitoring helps optimise ventilation and safety. [Clinics & Healthcare]: High‑grade sensors for reliable indoor air tracking. [DIY & Makers]: Fully customisable hardware and firmware. [Commercial Deployments]: RESET‑accredited and compliant with building standards. Why We Like It: [Professional‑Grade Sensors]: Same sensor families used in commercial IAQ systems. [Open‑Source Freedom]: No locked‑down ecosystem — modify anything. [Comprehensive Metrics]: Eight key indoor air quality parameters in one device. [RESET Accreditation]: Meets global building‑standard requirements. [Robust ASA Enclosure]: UV‑resistant, durable, and engineered for accurate airflow. Care And Maintenance [Sensor Modules]: Keep vents clear for accurate airflow. [Enclosure]: Wipe with a soft cloth; ASA plastic resists UV and wear. [Mounting]: Use screws or stainless‑steel zip ties for secure installation. [Firmware]: Update or customise via AirGradient’s open‑source tools. [Data Management]: Export or stream readings to your preferred server.