Head-to-head · Best Air Quality Monitors

AirGradient One vs Amazon Smart Air Quality Monitor – Know your air, Works with Alexa

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

AirGradient One comes out ahead by a clear margin (4.0 vs 3.6). The gap is mostly about DIY enthusiasts — read the strengths below before deciding.

AirGradient One

Higher ratedRanked #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 →

Ranked #6 in Best Air Quality Monitors

Amazon Smart Air Quality Monitor – Know your air, Works with Alexa

3.6

$69

The Amazon Smart Air Quality Monitor measures PM2.5, VOCs, CO, humidity, and temperature to provide an indoor air quality score. PCMag called it 'fairly limited in terms of functionality' but noted it 'easily alerts you to pollutants and other gaseous impurities.' The device integrates with Alexa for notifications and voice control, and offers comprehensive air quality graphs. However, it doesn't purify air and lacks measurement of CO2 and radon, which some reviewers noted as significant limitations. This monitor is best for users seeking basic air quality awareness rather than comprehensive air purification solutions.

Strengths

— Measures PM2.5, VOCs, CO, humidity, and temperature
— Provides hourly, daily, and weekly air quality graphs
— Indicator light shows current air quality at a glance

Watch-outs

— Does not purify the air
— Only measures PM2.5, not PM10 particles
— Does not measure CO2 or radon gases

$69 · Check Price on Amazon 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.

Amazon Smart Air Quality Monitor – Know your air, Works with Alexa

The Amazon Smart Air Quality Monitor provides basic air quality awareness with PM2.5, VOCs, CO, humidity, and temperature measurements, but it lacks CO2 and radon detection that other models like the Airthings 2960 View Plus offer. While it integrates well with Alexa, its limited sensor range makes it less comprehensive compared to the Atmotube PRO 2, which provides more detailed particle measurements and GPS tracking.

Specs side-by-side

Spec	AirGradient One	Amazon Smart Air Quality Monitor – Know your air, Works with Alexa
Sensors	CO₂, PM₂.₅, VOCs, NOₓ	Sensirion SEN44, Figaro TGS5141
Connectivity	WiFi 2.4GHz, Bluetooth LE, Bluetooth 5, Bluetooth mesh	2.4GHz Wi-Fi, BLE 4.2
Power Source	USB 5V 2A	Micro-USB (5W)
Display	OLED	—
Dimensions	130 x 130 x 35mm	1.8 x 2.6 x 2.6 inches
Weight	350 grams	120 grams
App	AirGradient Dashboard, Home Assistant, Homey	Amazon Alexa app
Measurements	PM2.5, CO2, TVOCs, NOx, Temperature, Humidity	PM2.5, VOCs, CO, humidity, temperature

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