Updated November 2026
Data from the official Airthings and Sonoff sites.
2026 verdict
Just need a number for CO2? The SONOFF SAWF-08P Air Quality Monitor is the practical pick between this radon-vs-CO2 pairing.
It runs a proper NDIR CO2 sensor, puts the reading on a large display, and commissions natively over Matter into Apple Home, Alexa, Google Home, SmartThings and Home Assistant with no hub. The Airthings 2950 Wave Radon answers back with the one thing the SONOFF cannot do at all: it actually detects radon, plus temperature and humidity, syncing over Bluetooth with an optional SmartLink hub for continuous data. Both track temperature and humidity, and both hold a similar owner rating for what they do. If radon is the concern, the Wave Radon is not optional; if it's a CO2 reading you want, wired into whatever smart home platform you already run, the SAWF-08P is the simpler, cheaper buy.
Works with
Connectivity
vs
Winner
Connectivity
- Wi-Fi 2.4 GHz
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| Feature | Airthings 2950 Wave Radon | SONOFF SAWF-08P Air Quality Monitor | Winner |
|---|---|---|---|
| Price | $105.83 | $49.90 | SONOFF SAWF-08P Air Quality Monitor |
| Rating | 4.4 | 4.3 | Airthings 2950 Wave Radon |
| Connectivity | Bluetooth, Other | 2.4 GHz WiFi | Airthings 2950 Wave Radon |
| Screen | NO | YES | SONOFF SAWF-08P Air Quality Monitor |
| Integrations | Google Home, Alexa, Home Assistant | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | SONOFF SAWF-08P Air Quality Monitor |
| Alerts | Temperature Alerts, Humidity Alerts, Air Quality Alerts, Low Battery Alerts | Temperature Alerts, Humidity Alerts, Air Quality Alerts | Airthings 2950 Wave Radon |
| Weather Resistance | NO | NO | Tie |
| Sensors | Radon, Temperature, Humidity | CO2, Temperature, Humidity | Tie |
| Local Control | YES | YES | Tie |
What the differences mean
What each one detects
The Wave Radon exists to track radon over time, on batteries; the SAWF-08P has no radon sensor and instead reads CO2 continuously over mains power. Neither substitutes for the other.
Display
The SAWF-08P shows CO2, temperature and humidity on a permanent LCD panel; the Wave Radon has no screen at all, just a wave-activated status ring, so you check exact numbers in the app.
Smart home reach
The SAWF-08P's native Matter support reaches Apple Home, Alexa, Google Home, SmartThings and Home Assistant with no hub. The Wave Radon works with Google Home, Alexa and Home Assistant, and has no Apple Home, SmartThings or Matter support.
Power
The Wave Radon runs on 2 AA batteries so it can go anywhere; the SAWF-08P needs a permanent USB-C connection, which rules out battery-only placements.
Which one to buy if
- radon is what you're trying to catch
It's a purpose-built radon detector; the SAWF-08P has no radon sensor at all.
- you want one CO2 reading visible on a screen
Its permanent LCD shows CO2 continuously, something the Wave Radon's status ring cannot do.
- your smart home isn't Google Home, Alexa or Home Assistant
Native Matter gets it into Apple Home and SmartThings too, where the Wave Radon has no path in.
- you need to place the sensor somewhere with no outlet
AA batteries let the Wave Radon go anywhere; the SAWF-08P must stay plugged in.
$105.83
- + Rating: 4.4
- + Connectivity: Bluetooth, Other
- + Alerts: Temperature Alerts, Humidity Alerts, Air Quality Alerts, Low Battery Alerts
- - Price: $105.83 vs $49.90
- - Screen: NO vs YES
Winner
$49.90
- + Price: $49.90
- + Screen: YES
- + Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
- - Rating: 4.3 vs 4.4
- - Connectivity: 2.4 GHz WiFi vs Bluetooth, Other
What owners say
Owners of both devices land on the same first impression: setup takes minutes and neither needs a manual to understand its readout. From there they diverge with what each device is built to answer. Airthings 2950 Wave Radon owners describe watching levels fall after fixing a mitigation fan and trust the readings enough to base decisions on them, though a few wish it had Wi-Fi instead of Bluetooth-only sync. SONOFF SAWF-08P Air Quality Monitor owners praise how quickly it commissions into Matter with no separate hub and how readable the display is, while some flag that the USB-C port sits on the back, making a flush wall mount awkward, and that there's no manual calibration control.
Frequently Asked Questions
Which is better overall: Airthings 2950 Wave Radon or SONOFF SAWF-08P Air Quality Monitor?
It depends on the pollutant. For radon, the Airthings 2950 Wave Radon is the only real option, since the SONOFF SAWF-08P Air Quality Monitor has no radon sensor. Judged purely as a CO2, display and platform comparison, the SONOFF SAWF-08P Air Quality Monitor comes out ahead.
Does the SONOFF SAWF-08P Air Quality Monitor detect radon?
No. It measures CO2, temperature and humidity only. The Airthings 2950 Wave Radon is the dedicated radon detector of the pair.
What is the biggest difference between the Airthings 2950 Wave Radon and the SONOFF SAWF-08P Air Quality Monitor?
What they're built to detect and how they're powered. The Wave Radon runs on batteries and tracks radon with no screen; the SAWF-08P is mains powered, tracks CO2, and shows it on a permanent display.
Which one works with more smart home platforms?
The SONOFF SAWF-08P Air Quality Monitor. Its native Matter support reaches Apple Home, Alexa, Google Home, SmartThings and Home Assistant with no hub, while the Airthings 2950 Wave Radon covers Google Home, Alexa and Home Assistant only.
Who should buy the Airthings 2950 Wave Radon?
Anyone tracking radon in a basement or crawlspace, or checking that a mitigation system is still working, who wants a battery-powered detector they can place anywhere.
Who should buy the SONOFF SAWF-08P Air Quality Monitor?
Buyers who want an affordable, always-on CO2 monitor that plugs into whatever Matter-based smart home they run, and who don't need radon detection.
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