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Air Quality Monitors · Head to head

Airthings 325 Corentium Home 2 vs SONOFF SAWF-08P Air Quality Monitor

Full Smart Air Quality Monitors comparison in 2026

Updated September 2026
Data from Amazon and official Airthings and Sonoff sites.
2026 verdict
Radon in an older home? The Airthings 325 Corentium Home 2 is the one built for that.
Airthings 325 Corentium Home 2
Winner
Airthings 325 Corentium Home 2
$179.99
Buy on Amazon USACheck price
It samples hourly, rolls readings into 24-hour, 7-day, 30-day and long-term averages on a simple Good/Fair/Poor display, holds a higher owner rating, and carries a longer warranty than the SONOFF SAWF-08P Air Quality Monitor. The SONOFF answers back on price and platform reach: it costs less, connects natively over Matter into Apple Home, Alexa, Google Home, SmartThings and Home Assistant, and covers a broader alert set for temperature, humidity and air quality. But it measures CO2, not radon, so the two exist for different jobs. If radon is why you're shopping, the Corentium Home 2 is not optional; the SONOFF only becomes the better pick once radon is off the list.
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FeatureAirthings 325 Corentium Home 2SONOFF SAWF-08P Air Quality MonitorWinner
Price$179.99$49.90SONOFF SAWF-08P Air Quality Monitor
Rating4.54.3Airthings 325 Corentium Home 2
ConnectivityBluetooth, Other2.4 GHz WiFiAirthings 325 Corentium Home 2
IntegrationsGoogle Home, Alexa, Home AssistantGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterSONOFF SAWF-08P Air Quality Monitor
AlertsTemperature Alerts, Humidity Alerts, Air Quality Alerts, Low Battery AlertsTemperature Alerts, Humidity Alerts, Air Quality AlertsAirthings 325 Corentium Home 2
Weather ResistanceNONOTie
ScreenYESYESTie
SensorsRadon, Temperature, HumidityCO2, Temperature, HumidityTie

What the differences mean

What each one detects

The Corentium Home 2 exists to track radon, alongside temperature and humidity, sampling hourly into rolling averages. The SONOFF has no radon sensor and reads CO2 instead.

Warranty

5 years on the Corentium Home 2 against a warranty the SONOFF's own listing does not document, a real gap for a device meant to run for years.

Power

The Corentium Home 2 runs on 2 AA batteries, so it goes anywhere. The SONOFF needs a permanent USB-C connection and has no battery option.

Smart home reach

The SONOFF's native Matter reaches Apple Home, Alexa, Google Home, SmartThings and Home Assistant with no hub. The Corentium Home 2 works with Google Home, Alexa, Home Assistant and IFTTT, with no Apple Home, SmartThings or Matter support.

Which one to buy if

Winner
Airthings

Airthings 325 Corentium Home 2

$179.99
Buy on Amazon USACheck price
  • + Rating: 4.5
  • + Connectivity: Bluetooth, Other
  • + Alerts: Temperature Alerts, Humidity Alerts, Air Quality Alerts, Low Battery Alerts
  • - Price: $179.99 vs $49.90
  • - Integrations: Google Home, Alexa, Home Assistant vs Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter

What owners say

Owners of both devices call setup and daily use effortless, with neither asking for any real technical know-how. From there the praise splits along what each device measures. Airthings 325 Corentium Home 2 owners describe results they trust against professional radon tests and value the rolling averages over a single snapshot, with a few noting the premium price and Bluetooth-only range. SONOFF SAWF-08P Air Quality Monitor owners like how fast it joins a Matter network with no separate bridge, while some mention there's no way to manually calibrate it and the screen is harder to read from an angle.

Price history compared

Every price change of both, in the same store, so the gap between the two lines is what one costs more than the other.

  • Airthings 325 Corentium Home 2
  • SONOFF SAWF-08P Air Quality Monitor

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Frequently Asked Questions

Which is better overall: Airthings 325 Corentium Home 2 or SONOFF SAWF-08P Air Quality Monitor?

If radon is the pollutant you care about, the Airthings 325 Corentium Home 2 wins by default, since the SONOFF SAWF-08P Air Quality Monitor cannot detect radon at all. As a CO2 monitor with wider platform reach, the SONOFF SAWF-08P Air Quality Monitor comes out ahead.

Does the SONOFF SAWF-08P Air Quality Monitor measure radon?

No, it reads CO2, temperature and humidity only. The Airthings 325 Corentium Home 2 is the dedicated radon detector here.

What is the biggest difference between the Airthings 325 Corentium Home 2 and the SONOFF SAWF-08P Air Quality Monitor?

What they're built to track. The Corentium Home 2 samples hourly for rolling radon averages; the SAWF-08P is a continuous, mains-powered CO2 monitor with native Matter reach.

Which one works with more smart home platforms?

The SONOFF SAWF-08P Air Quality Monitor, whose native Matter reaches Apple Home, Alexa, Google Home, SmartThings and Home Assistant. The Airthings 325 Corentium Home 2 covers Google Home, Alexa, Home Assistant and IFTTT.

Who should buy the Airthings 325 Corentium Home 2?

Anyone who wants a portable, battery-powered radon detector with a simple display and rolling averages, backed by a longer warranty.

Who should buy the SONOFF SAWF-08P Air Quality Monitor?

Buyers who want an affordable, always-on CO2 monitor that connects natively to whatever Matter smart home platform they already use.

Full comparison table

Compare all 32 Air Quality Monitors side by side

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