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Airthings Corentium Home Review: Simple Long-Term Radon Tracking

The Corentium Home 223 was the first battery-operated digital radon detector and it is still sold. It has no Bluetooth, no Wi-Fi and no app. This review explains why that simplicity is still attractive and when the newer Home 2 is the better buy.

By the Akermin Editorial Team · 2 min read

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Airthings Corentium Home Review: Simple Long-Term Radon Tracking

Airthings · Airthings Corentium Home Radon Detector 223 Portable, Lightweight, Easy-to-Use, (3) AAA Battery Operated, USA Version, pCi/L

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Price and availability are shown on Amazon and can change at any time.

Verdict

The Corentium Home 223 does one thing: it counts radon and shows a short-term and a long-term average on a small LCD. It runs for months on three AAA batteries and has no connectivity at all. That makes it the least fussy radon monitor you can buy. It is well suited to someone who wants a continuous number in the basement and does not want an app, a hub or an account. The newer Corentium Home 2 adds Bluetooth, temperature and humidity for a moderate premium and is the better choice if you want to see trends.

Documented Specifications

Item Documentation
Radon sensor Airthings passive diffusion chamber, alpha spectrometry
Averages shown Short-term (1 day and 7 day) and long-term on the LCD
Report Self-inspection report mode
Other sensors None
Connectivity None
Power 3 × AAA

How It Works

Radon diffuses into the chamber and the sensor counts the alpha particles from its decay. The device averages those counts into a short-term figure that responds within a day and a long-term figure that keeps refining as long as the monitor runs. Airthings’ guidance, and radon guidance in general, is to act on the long-term number. The short-term figure is useful for seeing the effect of a change such as sealing a sump or running a fan. See choosing a radon monitor for what the numbers mean.

Using It

Place it at breathing height in the lowest lived-in level, away from drafts, windows and heat sources, and leave it. Check the display occasionally. When you need a record, use the report mode and copy the values. Owners who have run the 223 for years describe it as reliable and forgettable, which for a radon monitor is praise.

Strengths

  • Simplest possible operation; nothing to pair or configure.
  • Battery powered with long life.
  • Both averages on screen at all times.
  • No subscription or account.

Limitations

  • No graphs or history beyond the displayed averages.
  • No temperature or humidity.
  • No alerts.

How It Compares

The Corentium Home 2 is the direct successor with Bluetooth and extra sensors. The Aranet Radon Plus adds a faster cycle and an e-ink display. If you want Wi-Fi, the View Radon is the Airthings model.

How We Research

This review is based on Airthings’ published specifications and support documentation, the Amazon listing and owner reports. We did not run laboratory tests.

Airthings 325 Corentium Home 2 Smart Digital Radon Detector - Portable and Easy-to-use Radon Testing with Bluetooth connectivity and Humidity & Temperature Sensors

Airthings 325 Corentium Home 2 Smart Digital Radon Detector -

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Aranet Radon Plus Radon Detector for Home with 10-Minute Readings

Aranet Radon Plus Radon Detector for Home with 10-Minute Readings

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Airthings 2989 View Radon - Radon Monitor with Humidity & Temperature Detector - Battery Powered Mobile APP, WiFi, Alerts & Notifications

Airthings 2989 View Radon - Radon Monitor with Humidity &

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Products shown because their documented specifications fit this guide. Price and availability are on Amazon and can change.

Frequently Asked Questions

Does the Corentium Home have an app?

No. The 223 model shows readings on its LCD only. The Corentium Home 2 adds Bluetooth and the app.

How do I create the radon report?

The device has a report mode that displays the values needed for a self-inspection report; you record them from the screen.

How long until the reading is reliable?

The short-term average settles in about a day; the long-term average continues to refine over weeks. Airthings recommends leaving it in place for the long-term number.

Is it still worth buying?

If you want the lowest-cost, simplest continuous radon monitor with no phone involved, yes. If you want graphs, the Home 2 is worth the difference.

Affiliate disclosure: Akermin earns a commission from qualifying Amazon purchases made through links on this page. Our editorial picks are based on documented specifications and owner feedback, not commissions.