Head-to-head · Best Air Quality Monitors

AirGradient One vs Atmotube PRO 2

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

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The short answer

Atmotube PRO 2 comes out ahead by a clear margin (3.8 vs 4.2). The gap is mostly about field researchers — read the strengths below before deciding.

Ranked #5 in Best Air Quality Monitors

AirGradient One

3.8

2 sourcesall derived$230as of Aug 3

The AirGradient One measures carbon dioxide, PM2.5, VOCs and NOx on an open-source board, sold assembled for $230 or as a $138 kit. It uses better-specified sensors than most consumer monitors at the price, exposes every reading to Home Assistant and ESPHome, and keeps the data yours. What it asks in return is a tolerance for setup work: a browser-based Wi-Fi handoff, Torx screws that strip, and no radon sensor at all.

Strengths

— Easy to assemble and configure with user-friendly instructions
— Integrates seamlessly with Home Assistant for full control and automation
— Provides accurate readings for CO₂, PM₂.₅, VOCs, and NOₓ sensors

Watch-outs

— Initial WiFi hotspot setup can be problematic for some users
— Lacks radon sensor compared to competitors like Airthings View Plus

$230 · Buy at airgradient.com Full review →

Higher ratedRanked #3 in Best Air Quality Monitors

Atmotube PRO 2

4.2

4 sources$159as of Aug 1

The Atmotube Pro 2 is a meaningful step up from its predecessor, adding a carbon dioxide sensor and sharpening sensor accuracy. Reviewers noted it measures PM2.5, NOx, and TVOC with high correlation to reference standards, though some users reported problems with CO2 calibration. GPS and USB-C data access make it more useful for field research and personal monitoring. It does well on outdoor exposure tracking and data collection, while the carbon dioxide sensor's reliability remains a concern for some users. Researchers and health-conscious individuals who want comprehensive air quality data are the fit, but anyone who requires highly accurate CO2 measurements should look elsewhere.

Strengths

— Includes carbon dioxide sensor (Sensirion STCC4) for indoor air quality monitoring
— Upgraded PM sensor (Sensirion SPS30) provides accurate particle concentration measurements
— Built-in GPS and accelerometer enable location-aware data collection without excessive battery drain

Watch-outs

— Carbon dioxide measurements have reported systematic calibration issues
— Initial CO2 readings required manual adjustment to align with reference standards
— Some users experienced inconsistent performance with CO2 sensor accuracy

$159 · Buy at store.atmotube.com Full review →

Derived means the reviewer published no score, so one was inferred from their written verdict. Everything else is a number the publisher printed. How we rank.

How they stack up

AirGradient One

The AirGradient One excels in ease of setup and Home Assistant integration, making it more user-friendly than the Airthings models, which use lower-tier sensors and lack radon detection. While it doesn't match the Qingping Gen 2's sensor accuracy, it provides a more affordable option with good performance across CO₂, PM₂.₅, VOCs, and NOₓ sensors, making it a strong alternative to the more expensive Airthings devices.

Atmotube PRO 2

The Atmotube PRO 2 provides improved PM sensor accuracy and GPS tracking, but its CO2 sensor has reported calibration issues that make it less reliable than the Qingping Gen 2, which offers consistent Sensirion sensor performance. While it's better suited for field research than the Awair Element, which lacks GPS capabilities, the Atmotube PRO 2's CO2 accuracy problems make it less ideal for users requiring precise carbon dioxide monitoring.

Specs side-by-side

Spec	AirGradient One	Atmotube PRO 2
Sensors	CO₂, PM₂.₅, VOCs, NOₓ	Sensirion SPS30
Connectivity	WiFi 2.4GHz, Bluetooth LE, Bluetooth 5, Bluetooth mesh	Bluetooth 5.0
Power Source	USB 5V 2A	2300 mAh
Display	OLED	None
Dimensions	5.12 x 5.12 x 1.38 in	3.39 x 1.97 x 0.87 in
Weight	0.77 lb	0.23 lb
App	AirGradient Dashboard, Home Assistant, Homey	Atmotube App
Measurements	PM2.5, CO2, TVOCs, NOx, Temperature, Humidity	PM1, PM2.5, PM10, TVOC, NOx, CO2, Temp, Humidity, Pressure

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