9 Best Radon Detectors for Home Assistant (November 2026)

The best radon detectors for Home Assistant include the Airthings 325 Corentium Home 2 Smart Digital for Airthings app monitoring, the Aranet Radon Plus Radon Detector for Home for standalone readings and app data, and the Airthings Corentium Home Radon Detector 223 Portable for simple portable monitoring.

On this page (9 sections)

1. How we chose a home assistant radon detector
2. Radon detectors for app access, alarms, and local readings
3. What should you check before connecting a radon monitor?
4. How do you place a monitor for useful radon readings?
5. Which detector should you choose for Home Assistant?
6. Can a radon detector send readings to Home Assistant?
7. Is Aranet Radon Plus the same as Aranet Radon One?
8. Do I need Wi-Fi for a radon alarm?
9. Should I choose a radon monitor or an air purifier?

The best home assistant radon detector depends on whether you need a confirmed smart home connection or simply want app-connected readings. Airthings Corentium Home 2 connects to the Airthings app over Bluetooth and can support remote monitoring with an Airthings Hub or View series monitor, while Aranet Radon Plus offers an app alongside a standalone display.

The product details for these monitors don't confirm direct Home Assistant integration. Check support for the exact model and connection method before you plan automations around radon readings.

If your main goal is Wi-Fi access from a phone, our guide to the best WiFi radon detectors covers that distinction. For alarm options that work at the monitor, see Radon Monitors with Alarm System: A Useful Guide.

Our picks at a glance

1. 1
   Best for Airthings app monitoring

   Airthings 325 Corentium Home 2 Smart Digital

   9.5/10 our score

   See it on Amazon
2. 2
   Best for standalone readings and app data

   Aranet Radon Plus Radon Detector for Home

   9.1/10 our score

   See it on Amazon
3. 3
   Best for simple portable monitoring

   Airthings Corentium Home Radon Detector 223 Portable

   9.7/10 our score

   See it on Amazon

4. 4

   AEGTEST HOUND-1011S Portable Radon Detector

   Best for audible and visual alerts
   Check it
5. 5

   X-Sense Radon Detector for Home

   Best for long battery operation
   Check it
6. 6

   SafetySiren Safety Siren Pro4 Series Plug-In Radon

   Best for plug-in alarms without an app
   Check it
7. 7

   Ecosense Digital Radon Detector for Home

   Best for quick display updates
   Check it
8. 8

   AEGTEST HOUND-1011 Portable Radon Detector for Home

   Best for portable long-term tracking
   Check it
9. 9

   Radon Detector by Forensics

   Best for a color display
   Check it

How we chose a home assistant radon detector

We compared the stated connection options, display features, monitoring periods, and alarms for each detector. Our score weighs specs, features and buyer feedback against what you're shopping for.

A phone app is useful, but it does not prove a device can share readings with Home Assistant. We call out where the available product details don't specify a smart home connection, so you can verify that requirement before you buy.

Radon detectors for app access, alarms, and local readings

The picks below are ordered by score, with app access and standalone monitoring both represented. For a broader look at detector types and what they measure, start with [What Is a Radon Detector?

A Simple Guide](/what-is-a-radon-detector/).

1

Airthings 325 Corentium Home 2 Smart Digital: Best for Airthings app monitoring

9.5/10Our score

• Bluetooth connectivity
• Airthings app graphs
• Temperature and humidity sensors
• Remote monitoring with Airthings Hub or View series monitor

Bluetooth connects this battery-powered monitor to the Airthings app for graphs and advice. Pair an Airthings Hub or View series monitor to enable remote monitoring and notifications.

See it on Amazon

Pros

• App graphs show radon changes
• Display includes short and long-term averages
• Remote monitoring available with compatible Airthings equipment

Cons

• Remote access requires an Airthings Hub or View series monitor
• Bluetooth connection is not a direct Home Assistant integration

Airthings Corentium Home 2 is the clearest pick here for someone who wants radon readings in a phone app. For a separate model comparison, see Airthings View Plus vs Wave Plus.

Its Bluetooth connection works with the Airthings app, where graphs show how radon changes over time and personalized tips help interpret the readings.

The display gives short- and long-term radon averages along with temperature and humidity readings. The GOOD, FAIR, or POOR indicators give a quick visual summary, while the app provides more detail.

Pairing the monitor with an Airthings Hub or View series monitor enables remote monitoring and notifications. That is the stated path for remote access, so confirm the extra equipment and model compatibility if you need readings when away from home.

The product details do not specify direct Home Assistant support. Choose it for the Airthings app and compatible remote monitoring, then verify integration availability separately if Home Assistant automations are essential.

2

Aranet Radon Plus Radon Detector for Home: Best for standalone readings and app data

9.1/10Our score

• Readings every 10 minutes
• E-ink display with color-coded levels
• App for detailed data management
• Temperature, humidity, and pressure sensors

The Aranet Radon Plus works on its own with an E-ink display and can connect to its app for detailed data management. Its 10-minute readings and environmental sensors suit buyers who want more context on the device.

See it on Amazon

Pros

• Standalone operation
• Multiple average periods
• Tracks temperature, humidity, and pressure

Cons

• No direct Home Assistant integration is specified
• App is needed for detailed data management

Aranet Radon Plus takes readings every 10 minutes and shows levels on an E-ink screen. Its color-coded display and averages for real time, 24 hours, 7 days, and 30 days let you check readings on the device without opening an app.

The monitor also tracks temperature, relative humidity, and atmospheric pressure. The app offers detailed data management, custom warning thresholds, and data export, according to the product information.

It can operate as a standalone unit, but no direct Home Assistant integration is specified. Choose it if you value frequent readings, several display periods, and environmental measurements; confirm app or integration compatibility for your setup.

The Aranet Radon Plus is distinct from the Aranet Radon One. The Plus includes temperature, humidity, and pressure monitoring, while the product information describes Radon One as measuring radon only.

3

Airthings Corentium Home Radon Detector 223 Portable: Best for simple portable monitoring

9.7/10Our score

• Battery powered with 3 AAA batteries
• Short and long-term readings on screen
• Portable between rooms
• Self-inspection report

This portable monitor displays short and long-term readings without an outlet. It is a simple fit if you want to check radon by room and don't need app or smart home connectivity.

See it on Amazon

Pros

• Portable battery-powered design
• Short and long-term readings on screen
• Can generate a radon self-inspection report

Cons

• No app or smart home connection specified
• Does not provide remote monitoring

The Corentium Home 223 is for checking radon locally without a smart home connection. It runs on 3 AAA batteries and displays short- and long-term readings, so you can move it between rooms without needing an outlet.

Its screen also shows daily, weekly, and long-term averages. The device can generate a radon self-inspection report, which may be useful when documenting readings or checking whether mitigation changes have helped.

There is no Bluetooth or app connection specified for this model. Pick it for portable, on-device monitoring, not for a Home Assistant dashboard or automated alerts.

4

AEGTEST HOUND-1011S Portable Radon Detector: Best for audible and visual alerts

9.4/10Our score

• Audible and visual alarms
• 12-hour first results
• Hourly updates
• Short- and long-term views

The HOUND-1011S combines an on-device display with audible and visual alarms. Its hourly updates and long monitoring windows help you follow changes without relying on a smart home connection.

See it on Amazon

Pros

• Audible and visual alarms
• Switches between pCi/L and Bq/m³
• Includes a Type-C cable

Cons

• No app or smart home connection specified
• First reading appears after 12 hours

The AEGTEST HOUND-1011S focuses on local readings and alarms. It displays data for recent periods from 12 hours through 96 hours, while its longer monitoring options extend to 504 days.

Its first results appear within 12 hours, with hourly updates after that. The detector supports pCi/L and Bq/m³ units and has audible and visual alarms, giving you ways to notice a change without checking an app.

The built-in battery supports portable use, and a Type-C cable is included for continuous monitoring. No app or smart home connection is specified, so it should be treated as a standalone monitor unless you verify otherwise.

5

X-Sense Radon Detector for Home: Best for long battery operation

9.3/10Our score

• Up to 999 days of tracking
• Audible and visual alerts
• AA battery power
• Temperature and humidity monitoring

X-Sense offers audible and visual warnings, local record storage, and a stated battery life of up to 2 years. Choose it if you want alerts at the monitor and don't need phone or Home Assistant access.

See it on Amazon

Pros

• Audible and visual warnings
• Stores up to 99 records locally
• Temperature and humidity display

Cons

• No app or smart home connection specified
• No direct Home Assistant integration is specified

X-Sense combines radon tracking with temperature and humidity readings. It supports up to 999 days of tracking, stores up to 99 records locally, and has a Report button to save historical data.

The detector gives sound-and-light warnings when radon exceeds its threshold and can send low-power notifications on the device. It uses AA batteries, with a stated battery life of up to 2 years.

Its product details don't specify app access or Home Assistant support. Choose it if local alerts and long tracking matter more than remote viewing or smart home automations.

6

SafetySiren Safety Siren Pro4 Series Plug-In Radon: Best for plug-in alarms without an app

9.2/10Our score

• Continuous short- and long-term monitoring
• Audible and visual alarms
• Three audible alarm modes
• Backlit digital display

The Pro4 continuously monitors radon and offers audible and visual alarms, with no app, Wi-Fi, or subscription required. It suits a room where a wall outlet and on-device alerts work better than smart home control.

See it on Amazon

Pros

• Continuous monitoring
• Three audible alarm modes
• Self-test once every 24 hours

Cons

• Requires a standard wall outlet
• No app, Wi-Fi, or smart home connection

SafetySiren Pro4 is a plug-in choice for continuous monitoring without app setup. Its digital display shows short- and long-term radon levels, and its audible and visual alarms provide local alerts.

You can choose from 3 audible alarm modes, and the display has a backlight for easier viewing. SafetySiren says the unit performs a self-test once every 24 hours.

The monitor requires a standard wall outlet and does not require an app, Wi-Fi, or subscription. It does not provide a stated connection to Home Assistant, so consider it for direct room alerts instead of a connected dashboard.

7

Ecosense Digital Radon Detector for Home: Best for quick display updates

9.0/10Our score

• First reading in 10 minutes
• Updates every 10 minutes
• Short- and long-term averages
• Audible alarm

This plug-in monitor provides a large display and frequent updates without a smartphone. Choose it for local readings and an audible alarm, rather than app or Home Assistant control.

See it on Amazon

Pros

• First reading in 10 minutes
• Multiple timeframes shown
• Simple plug-in setup

Cons

• No smartphone connection specified
• Corded power is required

Ecosense's plug-in monitor emphasizes quick display updates and multiple averages. Its first reading appears in 10 minutes, and the screen shows real-time, daily, weekly, monthly, and long-term levels.

The EcoBlu has an audible alarm and a full-size digital display. It does not require a smartphone, which keeps readings available at the monitor even if you don't want an app.

No Wi-Fi or Home Assistant connection is specified. Choose it for a simple powered monitor with frequent updates, and compare our air purifier for the house guide if you're also planning wider indoor air improvements.

8

AEGTEST HOUND-1011 Portable Radon Detector for Home: Best for portable long-term tracking

8.9/10Our score

• First results within 6 hours
• Hourly updates
• Views from 6 hours to 504 days
• Alarm can be muted

The HOUND-1011 is a portable monitor with short- and long-term views and a mute option for its alarm. Its stated features support local tracking, but don't include a smart home connection.

See it on Amazon

Pros

• First results within 6 hours
• Supports pCi/L and Bq/m³
• Alarm can be muted

Cons

• No app or smart home connection specified
• First results take longer than the HOUND-1011S

The AEGTEST HOUND-1011 gives you a portable display with readings for periods from 6 hours through 96 hours, plus longer-term monitoring up to 504 days. Its first results appear within 6 hours, followed by hourly updates.

It supports pCi/L and Bq/m³, and the alarm can be muted in the Eco menu. A Type-C cable supports continuous use, while the built-in battery is stated to last up to 45 days in sleep mode.

No app or Home Assistant connection is specified. This model suits buyers who want local tracking and a mute option, rather than automated alerts sent to another device.

9

Radon Detector by Forensics: Best for a color display

8.5/10Our score

• Large color LCD screen
• Temperature display
• Audible alarm
• Battery powered

The Forensics detector combines an audible alarm with a color LCD and temperature display. Consider it for on-device information, while treating its smart home connectivity as unconfirmed.

See it on Amazon

Pros

• Color LCD screen
• Displays temperature
• Cable and charger included

Cons

• No app or smart home connection specified
• Radon history periods are not specified

The Forensics detector has a large color LCD, temperature display, and audible alarm. It is battery powered, with a cable and charger included.

Its product details don't specify app support, a smart home connection, or radon history periods. That makes it harder to assess as a Home Assistant choice, but the on-device display and alarm may suit someone who wants local readings.

The detector's stated 20-year sensor life is a manufacturer claim. Choose it only after confirming the monitoring periods and connection options that matter to your setup.

What should you check before connecting a radon monitor?

Check the exact model's integration support, data path, and alert behavior before you buy a monitor for Home Assistant. A Bluetooth or manufacturer app connection does not automatically mean readings can appear in Home Assistant.

Look for clear support for your model and the way it connects, such as Bluetooth, Wi-Fi, or a hub. Confirm whether readings update automatically and whether the connection can keep working when the phone app is closed.

Think about what should happen if radon readings rise. An app notification, a local audible alarm, and a Home Assistant automation are different alert paths, so decide which ones you need and whether the monitor can provide them.

For a comparison focused on wireless options, read best WiFi radon detector. If you want an alarm in a basement, our best radon alarm for basement guide covers placement and local alerts.

How do you place a monitor for useful radon readings?

Place a radon monitor according to its instructions and the room you want to measure. For a basement, choose a stable spot where the device can remain undisturbed and where its display or alarm is easy to check.

Use one monitor in the space you want to understand, then allow it to collect readings over time. Radon levels can vary, so a single short reading may not describe a room's longer-term pattern.

If you plan to move a portable monitor between rooms, note the location and timing so you can interpret each set of readings. For inspection work, see radon monitors for home inspectors.

For practical setup considerations, use our radon alarm installation guide.

A monitor reports readings, but does not reduce radon by itself. If levels concern you, consult local public health guidance or a qualified radon professional about testing and mitigation.

Which detector should you choose for Home Assistant?

Choose Airthings Corentium Home 2 if you want Bluetooth access to the Airthings app and the option of remote monitoring with compatible Airthings equipment. Choose Aranet Radon Plus for a standalone screen, frequent readings, environmental measurements, and app data management.

If Home Assistant itself is a firm requirement, verify that the exact model and connection method are supported before ordering. For a local alarm without an app, SafetySiren Pro4 is a straightforward plug-in option, while the portable Corentium Home 223 keeps readings on its own display.

A radon monitor can complement broader indoor air planning, but it serves a different purpose from an air purifier. Compare the monitoring and filtration roles in our air purifier guide.

Can a radon detector send readings to Home Assistant?

Only if the exact monitor and its connection method are supported by your Home Assistant setup. Bluetooth access to a brand's app, such as Airthings app connectivity, does not by itself confirm a Home Assistant integration.

Check whether the integration can retrieve readings automatically and whether it supports the model you plan to buy. Keep the monitor's on-device display or alarm in mind as a separate way to check conditions.

Is Aranet Radon Plus the same as Aranet Radon One?

No. Aranet Radon Plus tracks radon, temperature, humidity, and atmospheric pressure, while the product information describes Radon One as measuring radon only.

The Plus also offers real-time, 24-hour, 7-day, and 30-day averages on its display. Confirm the exact model name when comparing features or checking smart home compatibility.

Do I need Wi-Fi for a radon alarm?

No. SafetySiren Pro4 provides continuous readings and audible and visual alarms without an app or Wi-Fi, while several portable monitors show readings directly on their displays.

Wi-Fi or another supported connection matters if you want readings on a phone or in a smart home system. For more connected options, compare Radon Monitors with Alarm System: A Useful Guide.

Should I choose a radon monitor or an air purifier?

Choose a radon monitor to measure radon levels, and choose an air purifier for the kinds of airborne particles its filter is designed to capture. An air purifier does not replace radon monitoring or radon mitigation.

If radon readings are a concern, focus on testing and appropriate mitigation guidance. A purifier may be a separate part of your indoor air plan, as explained in our air purifier for the house guide.

Our top 3 picks at a glance

1. 1
   Best for Airthings app monitoring

   Airthings 325 Corentium Home 2 Smart Digital

   9.5/10 our score

   See it on Amazon
2. 2
   Best for standalone readings and app data

   Aranet Radon Plus Radon Detector for Home

   9.1/10 our score

   See it on Amazon
3. 3
   Best for simple portable monitoring

   Airthings Corentium Home Radon Detector 223 Portable

   9.7/10 our score

   See it on Amazon

Frequently asked questions

Can I connect a radon detector directly to Home Assistant?

A direct connection depends on the monitor and the integration available for your Home Assistant setup. The product details here specify Airthings app connectivity for Corentium Home 2 and app access for Aranet Radon Plus, but don't specify a direct Home Assistant integration.

Check current Home Assistant integrations and the exact monitor model before buying if automatic readings are essential.

Which radon detector works without Wi-Fi?

The Airthings Corentium Home 2 uses Bluetooth to connect with the Airthings app, while the Aranet Radon Plus can work as a standalone monitor with its E-ink display. SafetySiren Pro4 also monitors continuously without an app or Wi-Fi.

A monitor can work without Wi-Fi and still lack Home Assistant support.

Is an app-connected radon detector the same as a Home Assistant detector?

No. An app connection lets you view readings through the manufacturer's app, but it doesn't by itself confirm that Home Assistant can receive those readings.

Look for support for your exact model, connection method, and desired automations before relying on an app-connected monitor for smart home alerts.

How should I use a radon monitor with smart home alerts?

First confirm the monitor can send readings to your smart home system. Then decide what reading or duration should trigger an alert, and keep the monitor's own display or alarm available as a separate way to check conditions.

For placement and setup, see our radon alarm installation guide.