9 Best Radon Detectors for Long-Term Monitoring (November 2026)

The best long-term radon detectors include the Airthings Corentium Home Radon Detector 223 Portable for simple on-screen averages, the Airthings 2950 Wave Radon for app-based trend review, and the AEGTEST HOUND-1011S Portable Radon Detector for extended stored history.

On this page (6 sections)

1. How we chose long-term radon detectors
2. The best long-term radon detectors for different needs
3. What should a long-term radon detector show?
4. Where should you place a monitor for long-term tracking?
5. Can a consumer monitor replace a long-term radon test?
6. How do you choose the best long-term radon detector?

The best long term radon detector for most homes is the Airthings Corentium Home Radon Detector 223 Portable, which displays daily, weekly and long-term averages without needing an outlet. For a phone app, choose the Airthings Wave Radon; for extended stored history, consider the AEGTEST HOUND-1011S.

Long-term monitoring helps you see patterns that short measurements can miss. Radon levels can change by day and season, so a useful detector should make it easy to review averages over time.

If you’re choosing a device for a whole house, start with our guide to the best radon detector for home. For the basics of what these devices do, see [What Is a Radon Detector?

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

Our picks at a glance

1. 1
   Best for simple on-screen averages

   Airthings Corentium Home Radon Detector 223 Portable

   9.7/10 our score

   See it on Amazon
2. 2
   Best for app-based trend review

   Airthings 2950 Wave Radon

   9.6/10 our score

   See it on Amazon
3. 3
   Best for extended stored history

   AEGTEST HOUND-1011S Portable Radon Detector

   9.5/10 our score

   See it on Amazon

4. 4

   AEGTEST HOUND-1008 Radon Detector for Home

   Best for battery-powered tracking
   Check it
5. 5

   Aranet Radon Plus Radon Detector for Home

   Best for frequent readings and averages
   Check it
6. 6

   AEGTEST HOUND-1011 Portable Radon Detector for Home

   Best for flexible short and long views
   Check it
7. 7

   AEGTEST HOUND-2070 Radon Detector for Home

   Best for combined radon and room readings
   Check it
8. 8

   AEGTEST HOUND-1085 Radon Detector for Home

   Best for rechargeable room-to-room checks
   Check it
9. 9

   Ecosense Digital Radon Detector for Home

   Best for plug-in long-term display
   Check it

How we chose long-term radon detectors

The strongest long-term radon detectors make trends easy to review and fit the way you plan to use them. We compared the available measurement periods, displays, power options and additional readings for each model.

For long-term use, a monitor should show more than a fresh reading. Daily, weekly, monthly, yearly or multi-year history can help you distinguish a short fluctuation from a pattern that lasts.

We also considered where the data appears. A screen is useful when you want a quick room check, while app syncing can make it easier to review measurements from a phone.

Our score weighs specs and features against what you’re shopping for: long-term trend tracking.

The best long-term radon detectors for different needs

The Airthings Corentium Home is the best fit for straightforward on-screen averages, while other picks offer app views, longer stored history or additional room readings. Match the history format to how you expect to check trends.

1

Airthings Corentium Home Radon Detector 223 Portable: Best for simple on-screen averages

9.7/10Our score

• Battery powered with 3 AAA batteries
• Daily, weekly and long-term averages
• Short-term readings
• Radon self-inspection report

Its screen shows daily, weekly and long-term radon concentrations, so you can check trends without opening an app. Battery power also lets you move it between rooms.

See it on Amazon

Pros

• Displays daily, weekly and long-term averages
• No outlet needed
• Can generate a radon self-inspection report

Cons

• No smartphone app is described in the available features
• Requires 3 AAA batteries

The Corentium Home makes a good choice if you want to check averages directly on the detector. For similar battery-powered displays, see battery operated digital radon detectors.

Its display shows daily, weekly and long-term concentrations, and it also provides short-term readings for a quick overview.

Because it runs on 3 AAA batteries, it does not need an outlet. That makes it easier to place in a room where you want to monitor levels or move it between locations to get an overview.

Airthings says the monitor can generate a radon self-inspection report. That feature may be useful when you want a record of the readings, though you should check local requirements before using a consumer monitor for an official purpose.

Choose the Corentium Home if you want simple screen-based trend checks. Consider another model if you specifically want Bluetooth app access or a stated multi-year data history.

2

Airthings 2950 Wave Radon: Best for app-based trend review

9.6/10Our score

• Daily, weekly, monthly and yearly app measurements
• Bluetooth app sync
• Battery powered
• Also monitors humidity and temperature

The Wave Radon suits buyers who want to review measurements over time in a phone app. It also tracks humidity and temperature.

See it on Amazon

Pros

• App offers daily through yearly measurements
• Shows long- and short-term results
• Tracks humidity and temperature

Cons

• Detailed results require app use
• Bluetooth syncing depends on being within range

The Airthings Wave Radon is a strong option if you prefer reviewing trend data on a phone. Its app includes daily, weekly, monthly and yearly measurements, which gives you several time frames for looking at changes.

The detector runs on batteries and syncs with the Airthings app over Bluetooth when your phone is within range. It also tracks humidity and temperature, so you can see those readings alongside radon.

Airthings says the Wave can connect to an Airthings Hub for data access online. That connection is optional, and the device can also provide visual air-quality feedback when you wave in front of it.

Choose the Wave when you want app-based history and related room readings. If you prefer a screen that shows long-term averages without app syncing, the Corentium Home may suit you better.

3

AEGTEST HOUND-1011S Portable Radon Detector: Best for extended stored history

9.5/10Our score

• History up to 504 days
• First reading appears within 12 hours
• Hourly updates
• Switches between pCi/L and Bq/m³

Its history range reaches 504 days, making it a fit for buyers who want to compare readings across long periods. The screen also shows several short-term windows.

See it on Amazon

Pros

• Stores up to 504 days of history
• Hourly updates after the first reading
• Supports two radon units

Cons

• First reading takes up to 12 hours
• No audible or visual alarm

The HOUND-1011S fits buyers who want a long saved record, with history available for up to 504 days. Its LCD also provides several shorter views, and the first result appears within 12 hours.

The detector updates readings hourly and supports pCi/L or Bq/m³. A Type-C cable supports continuous monitoring, while its built-in battery can last up to 45 days in sleep mode.

The model has no alarm, so you’ll need to check the screen to notice a change. High humidity can affect its readings, and AEGTEST advises keeping humidity below 90%.

Choose this model if a long history matters more than an alarm or quick first reading. For a battery-only setup with a longer stated battery life, compare the HOUND-1008.

4

AEGTEST HOUND-1008 Radon Detector for Home: Best for battery-powered tracking

9.5/10Our score

• Up to 400 days of battery life
• First reading in about 12 hours
• Hourly updates
• Audible and visual alerts

The HOUND-1008 is aimed at long-term monitoring without frequent charging. Audible and visual alerts signal when readings pass its alarm threshold.

See it on Amazon

Pros

• Up to 400 days of battery life
• Audible and visual alerts
• Switches between two radon units

Cons

• First reading takes about 12 hours
• No data-history duration is specified

The HOUND-1008 is aimed at buyers who want a monitor to run for a long stretch without frequent charging. AEGTEST gives it up to 400 days of battery life, along with hourly readings after the initial result.

Its first reading appears about 12 hours after startup. The detector supports both pCi/L and Bq/m³, and audible and visual alerts signal when readings pass its alarm threshold.

The available features don’t specify how many days of measurement history it retains. If the length of the stored record is your main concern, choose a model with a stated history period such as the HOUND-1011S.

Choose the HOUND-1008 if battery life and alerts matter most. It provides less detail about long-term history than several other picks here.

5

Aranet Radon Plus Radon Detector for Home: Best for frequent readings and averages

9.1/10Our score

• Radon measurement every 10 minutes
• Real-time, 24-hour, 7-day and 30-day averages
• Up to 7 years on 2 AA batteries
• Also measures temperature, humidity and pressure

The Aranet displays several averages, including 30-day results, on its E-Ink screen. It also measures temperature, humidity and pressure.

See it on Amazon

Pros

• Frequent 10-minute readings
• On-screen 30-day average
• Works standalone without an app

Cons

• History shown on-screen tops out at 30-day averages
• App is needed for detailed data management

The Aranet Radon Plus suits buyers who want frequent readings and a clear set of averages on the device. It measures radon every 10 minutes and shows real-time, 24-hour, 7-day and 30-day averages on its E-Ink display.

It runs on 2 AA batteries, with a stated life of up to 7 years. In addition to radon, it measures temperature, relative humidity and atmospheric pressure.

The screen’s average periods stop at 30 days, so it may not be the best fit if you want yearly data on the device. The app offers detailed data management, and the monitor can also work as a standalone unit.

Choose Aranet for frequent readings, multiple on-screen averages and long battery life. For yearly app views, the Airthings Wave is a closer match.

6

AEGTEST HOUND-1011 Portable Radon Detector for Home: Best for flexible short and long views

8.9/10Our score

• History up to 504 days
• First reading appears within 6 hours
• Hourly updates
• Type-C cable for continuous monitoring

This model supports long-term history alongside several short-term views. A Type-C cable can support continuous use, and the alarm can be muted in the Eco menu.

See it on Amazon

Pros

• Stores up to 504 days of history
• First reading appears within 6 hours
• Alarm can be muted

Cons

• Up to 45 days of battery life in sleep mode
• No audible or visual alarm

The HOUND-1011 offers a useful balance of short-term views and a long history. It stores up to 504 days of data, with the first reading available within 6 hours and hourly updates after that.

A Type-C cable supports continuous monitoring, and the built-in battery can last up to 45 days in sleep mode. You can switch between pCi/L and Bq/m³, and the alarm can be muted through the Eco menu.

AEGTEST notes that high humidity can affect readings and advises keeping humidity below 90%. Direct exposure to strong light can also affect detection, so choose a shaded placement.

Choose the HOUND-1011 if you want several reading windows and long stored history. The HOUND-1011S offers the same stated maximum history, but its first reading takes longer.

7

AEGTEST HOUND-2070 Radon Detector for Home: Best for combined radon and room readings

8.8/10Our score

• History up to 504 days
• Also displays temperature and humidity
• Audible and visual alarms
• Rechargeable battery

The HOUND-2070 combines extended radon history with temperature and humidity readings. Its alarms provide audible and visual notices when levels exceed the preset threshold.

See it on Amazon

Pros

• Stores up to 504 days of history
• Displays temperature and humidity
• Audible and visual alarms

Cons

• First reading takes up to 12 hours
• Battery lasts up to 45 days in sleep mode

The HOUND-2070 combines radon history with temperature and humidity readings. It stores up to 504 days of history, making it a fit if you want to review long-term radon changes alongside those room conditions.

Its first reading appears within 12 hours, followed by hourly updates. The rechargeable battery lasts up to 45 days in sleep mode, and audible and visual alarms can signal readings above your preset threshold.

The device shows several short-term time windows as well as its stored history. It supports pCi/L or Bq/m³, so you can use the unit that is familiar to you.

Choose this model if combined room readings and alarms are useful. If you don’t need temperature or humidity, the HOUND-1011S is another way to get up to 504 days of history.

8

AEGTEST HOUND-1085 Radon Detector for Home: Best for rechargeable room-to-room checks

8.5/10Our score

• History up to 504 days
• First reading appears in 6 hours
• Rechargeable
• Audible and visual alarms

This rechargeable monitor can be moved between rooms and stores up to 504 days of history. Its color-coded bars and customizable sound alerts help call attention to raised readings.

See it on Amazon

Pros

• Stores up to 504 days of history
• First reading appears in 6 hours
• Rechargeable with over 1 month of continuous monitoring

Cons

• Charging takes 3.5 hours
• No temperature or humidity readings

The HOUND-1085 is a rechargeable option for checking more than one room over time. It supports up to 504 days of history, and the first reading appears in 6 hours.

Its color-coded bars and customizable sound alerts call attention to higher readings. AEGTEST says it can run for over a month of continuous monitoring and recharges in 3.5 hours.

The detector supports short views of 6, 24, 48 and 96 hours alongside long-term history. It can be moved between rooms, but readings from separate locations should be treated as different records.

Choose the HOUND-1085 if you want a rechargeable detector with stored history and alerts. The Corentium Home is simpler if you mainly want battery operation and clear on-screen averages.

9

Ecosense Digital Radon Detector for Home: Best for plug-in long-term display

8.3/10Our score

• Real-time, daily, weekly, monthly, yearly and long-term averages
• First reading in 10 minutes
• No smartphone needed
• Corded electric

The EcoBlu shows a wide range of averages on its display, from real-time through long-term. It runs from an outlet and does not require a smartphone.

See it on Amazon

Pros

• Displays long-term averages
• No phone or battery needed
• First reading in 10 minutes

Cons

• Needs an outlet
• Portable battery use may affect measurement accuracy

The EcoBlu is the plug-in choice for buyers who want a display with several averaging periods. It shows real-time, daily, weekly, monthly, yearly and long-term averages, and its first reading appears in 10 minutes.

It needs an outlet and does not require a smartphone or battery. Its full-size LED screen is designed to be easy to read from a distance.

The EcoBlu’s corded power makes placement less flexible than a battery monitor. Its maker also notes that portable battery use may affect measurement accuracy and recommends using the included power adapter.

Choose it if you want a visible screen and a stable outlet-based setup. For a battery-powered detector, see our guide to the best plug in radon detector.

What should a long-term radon detector show?

A long-term radon detector should display averages across more than one period, so you can compare recent readings with longer trends. Daily, weekly and monthly views help explain short changes, while yearly or long-term views can show a broader pattern.

Some monitors store a specific number of days, while others show averages through an app. Check what “history” means for the model you’re considering, since a 30-day average and a 504-day record serve different needs.

A detector that displays data on-screen can be convenient for a quick check. App access may be more useful if you want to scroll through measurements or manage reports.

Where should you place a monitor for long-term tracking?

Place a monitor in a suitable room and leave it in the same position while you build a consistent record. A change in room or placement can make readings harder to compare over time.

Follow the device’s instructions for placement, height and distance from openings. Avoid moving the detector between rooms during a trend period; if you need to check another space, treat it as a separate monitoring period.

A basement may be a priority if it is a regularly used area, but use the placement guidance for your specific detector. Our guide to best basement radon detector covers options for that setting.

Can a consumer monitor replace a long-term radon test?

A consumer monitor helps you track changes, but it may not satisfy local requirements for a certified measurement. Use a qualified radon professional when you need an official result for a sale, rental or mitigation decision.

Long-term tests have specific methods and duration guidance. Read [What Is a Long Term Radon Test?

The Complete Answer](/what-is-a-long-term-radon-test/) to understand how a test differs from continuous monitoring.

Radon is a health concern, so don’t rely on one brief reading to make a major decision. If results are raised, follow local public health guidance for confirmation and next steps.

How do you choose the best long-term radon detector?

Choose the best long term radon detector by matching its history and display to the way you’ll review results. The Corentium Home suits straightforward on-screen averages, the Wave offers yearly app views, and the HOUND-1011S stores up to 504 days of history.

Pick Aranet if you want frequent readings with a 30-day average on-screen. Choose the EcoBlu if you prefer an outlet-powered display, or a portable model if you need to monitor separate rooms at different times.

For other indoor air concerns, our guide to the best particulate matter monitor covers devices that track particles instead of radon. A radon detector measures radon and should not be treated as a general air-quality monitor.

Our top 3 picks at a glance

1. 1
   Best for simple on-screen averages

   Airthings Corentium Home Radon Detector 223 Portable

   9.7/10 our score

   See it on Amazon
2. 2
   Best for app-based trend review

   Airthings 2950 Wave Radon

   9.6/10 our score

   See it on Amazon
3. 3
   Best for extended stored history

   AEGTEST HOUND-1011S Portable Radon Detector

   9.5/10 our score

   See it on Amazon

Frequently asked questions

How long should a radon detector monitor?

For a useful picture of changing radon levels, leave a continuous monitor in place for weeks or months and review its longer-term averages. Radon can vary with weather and from day to day, so a brief reading may not reflect typical conditions.

Follow the device instructions for placement and interpretation.

Can a long-term radon detector replace a certified test?

A consumer monitor can help you track changes and spot patterns, but it may not meet your local requirements for a real estate transaction or official measurement. Check local guidance and use a qualified radon professional when a certified result is required.

For background on test types, read [What Is a Long Term Radon Test?

The Complete Answer](/what-is-a-long-term-radon-test/).

Should I move a radon monitor between rooms?

Keep the monitor in one suitable location while you build a consistent trend. Moving it changes the room being measured, so readings from different rooms should not be treated as one continuous record.

A battery model is easier to reposition when you deliberately want to check another area.

What should I compare when choosing a long-term radon monitor?

Compare the history or averaging periods, how readings appear, power source, and whether you want app access or on-screen data. A display with yearly or long-term averages can make season changes easier to review.

Check whether a model needs an outlet, phone connection, or regular charging.