AirGradient Open Air Monitor
$190.00
The Open Air (Model O-1PST) is an outdoor air quality monitor that checks whether the air quality is healthy.
Key Features:
- Measures PM1, PM2.5, PM10, CO2, TVOCs, NOX, temperature, and humidity
- Weatherproof enclosure
- Can be mounted on walls
- Fully open-source code for easy customization
- 12-month warranty
- Certifications: CE, RoHS, REACH, FCC
Please note that Smart Air is an official partner of AirGradient and this link will take you to the AirGradient website to make the purchase.
The Open Air is one of the first low-cost outdoor air quality monitors to include a CO2 sensor, enabling the detection of local emission sources that may not produce visible particulate matter.

Comprehensive Monitoring with Eight Metrics
The Open Air monitor provides comprehensive air quality insights by measuring PM1, PM2.5, PM10, CO2, TVOCs, NOX, temperature, and humidity using the Plantower PMS5003T sensor, the SenseAir S8, the Sensirion SGP41 sensors, and more.

Flexible Data Usage & Open Source Connectivity
The Open Air monitor offers unparalleled flexibility and allows you to connect your air quality data to any server, such as Home Assistant or the AirGradient data platform. You can benefit from real-time air quality insights, alerts, detailed reports, and the option to share outdoor data with OpenAQ.

Easy to Mount on the Walls
This Open Air monitor is weatherproof and can be securely mounted on walls or poles using screws or stainless steel zip ties, with an additional secure screw to prevent theft.

Customizable Durable Enclosure Design
Constructed with premium UV-protected ASA plastic, the Open Air monitor ensures durability and accurate air quality measurement, maintaining optimal airflow and minimizing condensation risk.
As an open-source monitor, you can adjust easily by making changes and additions to the firmware and hardware.



Best Paired with Indoor Monitor
To fully understand your environment’s air quality, we recommend monitoring indoor and outdoor air. This approach provides valuable insights into pollution sources, and ventilation effectiveness, and allows for comparative reports on air quality.
Learn more about our indoor air monitor.


Open Air Monitor Technical Specifications
Your Purchase Includes | Includes 1 × Monitor, adhesive hook, charging cable, user manual |
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Colour | White and Blue |
Dimensions L × W × H (mm) | 90 x 80 x 80 |
Weight (g) | 195 |
Ranges | PM1: 0 ~ 500 μg/m³ PM2.5: 0 ~ 500 μg/m³ PM10: 0 ~ 500 μg/m³ Temperature: 0 – 70℃ Humidity: 20 ~ 80%RH TVOC/NOX: 0 ~ 500 VOC/NOx Index CO2: 400 ~ 10,000 ppm |
Power Supply | >2A / USB-C cable |
Bluetooth | Bluetooth 5.0 / Bluetooth Mesh |
Metrics x8 | PM1, PM2.5, PM10, CO2, TVOCs, NOX, Temperature, Humidity. |
Network | Wi-Fi 2.4GHz |
Warranty | 1 year |
Certification | CE, RoHS, REACH, FCC |
Additional information
Weight | 0.4 kg |
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Dimensions | 9 × 10 × 15 cm |
Brand | Smart Air |
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