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.

The short answer

Atmotube PRO 2 comes out ahead by a narrow margin (4.0 vs 4.3). The gap is mostly about field researchers — read the strengths below before deciding.

AirGradient One

Ranked #3 in Best Air Quality Monitors

AirGradient One

4.0

$230

The AirGradient ONE is praised for its ease of setup, open-source design, and reliable sensor readings across CO₂, PM₂.₅, VOCs, and NOₓ levels. Reviewers highlight its seamless Home Assistant integration and affordability, with a fully assembled model priced at $230 and a kit version at $138. However, some users reported initial WiFi hotspot connection issues, and the device lacks a radon sensor compared to alternatives like the Airthings View Plus. Despite a negative Wired review focusing on display durability, many users, including those in educational settings, find it reliable and effective for monitoring indoor air quality.

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 #2 in Best Air Quality Monitors

Atmotube PRO 2

4.3

The Atmotube Pro 2 represents a significant upgrade over its predecessor, adding a carbon dioxide sensor and improving sensor accuracy. Reviewers noted the device's ability to measure PM2.5, NOx, and TVOC with high correlation to reference standards, though some users reported issues with CO2 calibration. The inclusion of GPS and USB-C data access enhances its utility for field research and personal monitoring. While the device excels in outdoor exposure tracking and data collection, the carbon dioxide sensor's reliability remains a concern for some users. This monitor is ideal for researchers and health-conscious individuals seeking comprehensive air quality data but may not be suitable for those requiring highly accurate CO2 measurements.

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

Buy at store.atmotube.com Full review →

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	130 x 130 x 35mm	86 x 50 x 22 mm
Weight	350 grams	106 g
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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