Smartair
AirGradient ONE Indoor Air Quality Monitor for Real-Time Measurements
AirGradient ONE Indoor Air Quality Monitor for Real-Time Measurements
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The AirGradient ONE Indoor Air Quality Monitor (Model I-9PSL) is a high-precision, open-source air monitor designed to measure real-time environmental metrics inside homes, offices, and classrooms. Built with industry-leading sensors, a vibrant OLED display, and a customisable RGB LED status bar, this compact unit tracks crucial indoor air pollutants — including PM2.5, CO2, TVOCs, and NOx — to help you identify poor ventilation and off-gassing chemicals. RESET Air accredited, it integrates seamlessly into local smart home systems like Home Assistant without cloud lock-in.
Key Features
- Multi-Pollutant Sensor Suite: Measures PM1, PM2.5, and PM10 particulate matter, CO2 (carbon dioxide), TVOCs (Total Volatile Organic Compounds), NOx (nitrogen oxides), temperature, and relative humidity.
- Industry-Leading Precision: Powered by a SenseAir S8/S88 NDIR CO2 module, a Plantower PMS5003 laser particle counter, and Sensirion SGP41 TVOC/NOx gas sensors for research-grade accuracy.
- At-a-Glance Visual Feedback: Integrated 1.3-inch OLED screen and a fully configurable RGB LED light bar that changes colour instantly based on live air quality levels.
- 100% Open Source & Privacy Focused: Built on an ESP32 microcontroller with open firmware and hardware schematics. Works locally with Home Assistant and Homey, or sends data to the optional AirGradient dashboard.
- RESET Air Accredited: Meets strict commercial building standards for continuous environmental air quality monitoring.
- Modular & Repairable Design: Durable, UV-resistant ASA plastic designed for long lifespans, easy disassembly, and component replacement.
Specifications
- Product Type: Indoor Air Quality Monitor
- Model: AirGradient ONE (I-9PSL)
- Microcontroller: ESP32-C3-MINI (Wi-Fi 2.4 GHz & Bluetooth LE)
- Display: 1.3-inch OLED Display (128x64 px) + Configurable RGB LED Bar
- Particulate Matter Sensor: Plantower PMS5003 (PM1, PM2.5, PM10)
- Carbon Dioxide Sensor: SenseAir NDIR CO2 module (0–10,000 ppm)
- Gas / Volatiles Sensor: Sensirion SGP41 (TVOC & NOx Index)
- Temp & Humidity Sensor: Sensirion SHT40 (±0.2°C / ±2% RH)
- Enclosure: ASA Plastic (UV-Resistant)
- Power Connection: USB-C (requires 5V / 2A USB power adapter)
- Cable Included: 2 m USB-C to USB-A data and power cable
- Certifications: RESET Air, CE, RoHS, REACH, FCC
- Dimensions: 13.0 cm (Length) x 13.0 cm (Width) x 3.5 cm (Height)
- Net Weight: 350 g
Shipping and Delivery
- Courier Distribution: Shipped securely via a dedicated UK courier network, packaged with internal protective padding to ensure delicate sensor components arrive in optimal condition.
- Delivery Coordination: Fully tracked delivery with dispatch alerts and tracking information sent via text or email prior to arrival.
Delivery Areas & Charges
Delivery Areas & Charges
Free UK Mainland Delivery
We offer free standard delivery across mainland UK.
For deliveries to Northern Ireland, Scottish Highlands & Islands, and the Channel Islands, availability and delivery costs can vary depending on the product and supplier.
Please contact us before ordering and we'll be happy to confirm availability and any additional delivery charge for your postcode.
Hear What Others Think
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Jane D.
"Very good customer service. Friendly, responsive, and always willing to answer questions. It’s clear they value their customers.”
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James E.
"A brilliant business ran by friendly, trustworthy people. I have been recommending them to everyone!"
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Mitch D.
"Thank you so much! So impressed by the people running this business. Will be back."
Why You Want Pure Air
At You Want Pure Air, we believe the spaces we live and work in shape how we feel every day.
That’s why we carefully select products designed to support healthier, calmer, and more comfortable living - from cleaner air and restorative sleep to focused workspaces and thoughtful home furnishings.
Every item in our collection is chosen with wellbeing, quality, and sustainability in mind, helping you create a home environment that feels better to live in.
Because better living doesn’t start outside the home. It starts within it.