Affordable & Open Air Quality Solutions for Buildings
Transform your building assessments and facility management with comprehensive indoor air quality monitoring. The AirGradient ONE delivers the accurate data you need to optimize building performance, ensure occupant health, and demonstrate compliance with building standards. All at a fraction of traditional monitoring costs.
With scalable fleet management, robust API integration, and modular design, our solutions grow with your business. Low total lifetime costs and easy deployment make the AirGradient ONE the smart choice for building consultants creating healthier, more productive indoor environments.
RESET-Accredited, Build for Well & USGBC Member
The AirGradient ONE is officially RESET Air Accredited, meeting the stringent requirements for continuous air quality monitoring in commercial buildings. As a USGBC member organization, we're committed to advancing green building practices and supporting professionals in achieving LEED, WELL, FITWEL, and other major building certifications.
Our monitors provide the comprehensive, reliable data required for initial certification and ongoing compliance verification. With automated reporting, continuous monitoring, and seamless integration capabilities, AirGradient simplifies the certification process while ensuring your buildings maintain the highest indoor environmental quality standards.
Why Choose the AirGradient ONE IAQ Monitor ?
Whilst there are many indoor air quality monitoring options that allow for compliance with these building standards, the AirGradient ONE serves as a great choice as it offers a better accuracy to most competitors on the market at a price under $250. Here are a few of our features:
Accuracy and Calibration
- High Precision Sensors - Built in calibration features
Real-Time Dashboard
- Customizable real-time insights for full IAQ control - Continuous Monitoring
Multipollutant
- Comprehensive IAQ Data - Measures PM, CO2, VOCs, NO2, Temperature and Humidity for full compliance
Smart Integration
Seamlessly connects with BMS, APIs and open-source platforms
Certification-Ready
- Meets Global Standards - Reset Air Certified and aligns with WELL, RESET, LEED and other IAQ frameworks
Cost-Effective
- Long-term value - Built for durability, longevity and easy maintenance
The AirGradient ONE
The AirGradient ONE indoor air quality monitor (Model I-9PSL-DE) tracks critical building performance metrics, including PM2.5, CO2, TVOCs, NOX, temperature, and humidity, providing complete environmental data for accurate assessments and compliance reporting. We also understand that for many building consultants, ease of setup and maintenance is a primary concern. The AirGradient ONE excels in both areas, with monitors that can be set up in minutes and don’t require constant attention.
Our cellular variant can be plugged in, mounted, and begins reporting data instantly with no network configuration required. THis makes it perfect for buildings without reliable WiFi or where IT coordination is challenging. The WiFi variant connects to existing networks within minutes, ideal for buildings with established and accessible connectivity. Each monitor automatically reconnects through power outages and network disruptions, ensuring continuous data collection for your assessments.
USB-powered operation enables frequent measurements throughout the day, providing the detailed data resolution essential for thorough building analysis. Remote fleet management through our professional dashboard allows you to monitor all sites from anywhere in the world, with instant notifications for any connectivity issues and over-the-air updates to keep your monitoring infrastructure current as your consulting practice grows.
Get the AirGradient ONE
AirGradient ONE
Indoor air quality monitor measuring PM2.5, CO2, TVOCs, NOX, Temperature and Humidity.
AirGradient ONE
- Model I-9PSL
- Sensors for CO2, PM2.5, TVOCs, NOX, Temperature and Humidity
- 2m USB C cable (w/o power plug)
- 12 months data platform / dashboard and API access (or connect it to your own server, e.g. home assistant)
- Local Home Assistant support with auto discovery
- Fully open-source code so you can easily make adjustments
- Fully assembled
- Tested in our test chamber with test report
- Certified: CE, FCC, RoHS, REACH, RESET Air
- 12 months warranty
USD230.00
Buy NowMulti Award-Winning Air Quality Monitor
The AirGradient ONE has received a range of awards, including two Awards at the AIRLAB Microsensors Challenge 2023.
The Microsensors Challenge is a global competition that aims to provide a robust and independent evaluation of microsensor technologies for air quality monitoring. For the first time, the challenge included testing in both France and Thailand to better understand the impact of different weather conditions, pollution levels, and sources on microsensors' performance.
The Jury's Opinion:
"The AirGradient ONE is a well performing, low-cost multi-pollutant solution for indoor applications. It provides very good to excellent CO2 measurements and good PM measurements. It is an overall well balanced solution and the best multi-pollutant indoor sensor for under €500."
We were also recently selected as the 'The best air quality monitor' by New York Times' Wirecutter. The author even went as far as to say they had 'finally found a worthwhile monitor: the AirGradient ONE'. These are just a few of the awards that the AirGradient ONE has received.
Ideal For Healthy Building Standards
Whether you're pursuing RESET AIR, WELL, FITWEL, LEED or another building standard, the AirGradient ONE is an affordable asset to your project. Tailored with the most commonly specified testing parameters, our monitors stand as industry leaders in Indoor Air Quality Monitoring, providing comprehensive data collection required for certification compliance and ongoing performance verification.
RESET AIR Compliance
- RESET Air Accredited Monitor with certified hardware and software platforms
- Continuous monitoring of PM2.5, CO2, VOCs, Relative Humidity, and Temperature
- Automated data logging and reporting for seamless certification processes
WELL Building Standard
- Monitors particle mass and carbon dioxide as required for Air Quality standards
- Real-time displays of Temperature, Humidity, and CO2 concentration
- Supports WELL's enhanced air quality monitoring requirements for optimized occupant health
FITWEL Certification
- Continuous monitoring of PM2.5, CO2, VOCs, Relative Humidity, and Temperature
- Provides comprehensive environmental data supporting FITWEL's evidence-based healthy building strategies
- Enables ongoing performance tracking for building health optimization
LEED Prerequisites
- Continuous monitoring of PM2.5, CO2, VOCs, and NOX for Indoor Environmental Quality credits
- Supports enhanced commissioning and measurement requirements
- Facilitates ongoing performance monitoring for LEED operations and maintenance
Enterprise-Grade Data Platform for Building Networks
Professional organizations need robust data infrastructure that scales with their built environment monitoring requirements. Our enterprise dashboard provides comprehensive fleet management, advanced analytics, and seamless integration capabilities—whether you're managing a single building, campus, or portfolio of properties. With full API access and flexible data export options, you maintain complete control over your indoor environmental data.
Fleet Management
Monitor hundreds of buildings and zones simultaneously with enterprise-grade performance. Centralized device management, bulk configuration updates, and real-time status monitoring for multi-site facility deployments.
Smart Alerting
Configure sophisticated alert rules for HVAC optimization and occupant comfort. Multi-channel notifications (email, SMS, webhooks) ensure critical indoor air quality events reach facility managers and building operators immediately.
Advanced Analytics
High-resolution data logging with powerful trend analysis for building performance optimization. Correlate IAQ data with HVAC operations, occupancy patterns, and energy usage. Full data export in multiple formats (CSV, JSON, API) for BMS integration.
Custom Reporting
Generate professional reports for building certifications, tenant communications, or ESG compliance. Automated scheduling for monthly building performance reviews and white-label options available for MEP consultants and facility management firms.
The AirGradient ONE in Your Space
The AirGradient ONE is designed to be able to fit into any built environment. Therefore, we’ve designed our air quality monitor to be flexible in its design, and it can either be the centre of attention or blend into its environment.
The monitor comes with included feet, allowing it to be placed on a surface like a desk or table, but it can also be mounted on a wall with screws. To make cable management easy, there are tracks at the back of the device allowing routing of cables.
Furthermore, the LEDs and screen are fully customisable, meaning you can adjust the brightness, or turn them off entirely if needed. We also have built-in scheduling, allowing the LEDs and screen to only turn on during the hours that a building is in use.
AirGradient ONE Technical Data
Below is the technical data of the newest version of the AirGradient ONE. Available in our online store.
| Specification | Description |
|---|---|
| Model | I-9PSL (AirGradient ONE, 9th Generation) |
| Microcontroller | ESP32-C3-MINI (32-bit RISC-V single-core processor, up to 160MHz, 384 KB ROM, 400 KB SRAM, 8 KB SRAM in RTC, 4 MB flash in chip package) |
| WiFi | 2.4GHz IEEE 802.11 b/g/n-compliant |
| Display | OLED display 1.3 inch (I2C 128x64px) |
| Bluetooth | Bluetooth LE: Bluetooth 5, Bluetooth mesh |
| Extensions | Broken out on PCB: I2C, 3 GPIO, 2 UART |
| Peripherals | 11 RGB-LEDs, Push Button, Reset Button, USB C Connector |
| External Hardware Watchdog | Texas Instruments TPL5010 |
| CO2 Sensor Module | SenseAir S8 (NDIR). 0 to 10000ppm. Accuracy: ±40 ppm ±3% of reading at 5 to 30°C, 0-85% RH (400 - 2000ppm range) or SenseAir S88 (NDIR). 0 to 10000ppm. Accuracy: ±40 ppm ±3% of reading at 5 to 30°C, 0-85% RH (400 - 3000ppm range) |
| Particle Sensor Module | Plantower PMS5003 (laser scattering principle). Accuracy Fully Assembled & Tested Model (I-9PSL-DE_asd): Accuracy PM2.5: ±4μg/m³@0-100μg/m³, ±8%@100-500μg/m³. Accuracy Kit Version (I-9PSL-DE_kit): Accuracy PM2.5: ±10μg/m³@0-100μg/m³, ±10%@100-500μg/m³. (PM1 and PM10 are also measured but PM2.5 has the highest accuracy). |
| Temperature and Humidity Module | Sensirion SHT40. Accuracy: Temperature ±0.2°C @ -40 to + 125°C; Humidity ±2% RH @ 0 - 100% RH |
| TVOC/NOX Module | Sensirion SGP41. Accuracy: TVOC <±15 @ 0 to 500 VOC Index (also available in ppb); NOX <±50 @ 0 - 500 NOX Index |
| Enclosure | ASA Plastic, UV Resistant and Weather Proof |
| Cable | 2m (USB C to USB A) Cable including Data Lines for Flashing |
| Power Plug (not included) | 2A 5V USB A Power Plug is Required |
| Dimensions & Weight | 130 x 130 x 35mm, 350 grams |
| Certifications | CE, RoHS, REACH, RESET Air, FCC ID: 2AC7Z-ESPC3MINI |
The AirGradient ONE is a well-performing, low-cost multi-pollutant solution for indoor applications. It provides very good to excellent CO2 measurements and good PM measurements. It is an overall well-balanced solution and the best multi-pollutant indoor sensor for under €500. (Actually you can get 2.5 monitors for that price)
The AIRLAB Jury
The AirGradient ONE uses the best-in-class sensor modules from SenseAir, Sensirion and Plantower and AirGradient does extensive research to guarantee the accuracy of the monitor. The monitor has been chosen for some of the largest scientific studies on indoor air quality, e.g. the SAMHE project led by the University of Cambridge, Imperial College London and York University.
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If you have any more questions feel free to contact our team and let us help you with your project today.