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The Best Radon Detector - 2021

Last updated on April 19, 2021

We looked at the top 9 Radon Detectors and dug through the reviews from 31 of the most popular review sites including and more. The result is a ranking of the best Radon Detectors.

Best Radon Detector

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Our Picks For The Top Radon Detectors

Show Contents
Our Take
Experts Included
Pros
Cons
  Best Overall

Elifecity Battery Powered Home Radon Detector

Don't Waste Your Money Seal of Approval

Elifecity

Battery Powered Home Radon Detector

Overall Take

Easy to UseThis radon detector provides both long and short-term results.

Experts Included
DWYM Tools Experts plus . Along with user reviews from Amazon.
  Easy to Read

SafetySiren Pro4 Series Radon Detector

SafetySiren

Pro4 Series Radon Detector

Overall Take

Large ScreenWhen radon levels in your home reach the high range, this radon detector emits an audible alert, so you can take the appropriate actions.

Experts Included
DWYM Tools Experts plus . Along with user reviews from Amazon.
  Portable Pick

Airthings Corentium Home Radon Detector

Airthings

Corentium Home Radon Detector

Overall Take

Battery-Operated OptionThis radon detector is highly portable, since it doesn’t need to be plugged into an outlet to use.

Experts Included
DWYM Tools Experts plus Alarm New England, Spy, CompetentReviews, Wiki EZ Vid, CNET, Top 10 Beasts Pro and 1 more. Along with user reviews from Amazon and Home Depot.
Pros
" Its portability allows you to conveniently monitor radon levels in various locations"
Cons
"This product won’t alert you if the radon levels are too high, so you’ll need to know what to look for."
  App-Compatible

Radon Eye RD200 Ecosense Bluetooth Radon Detector

Radon Eye

Ecosense Bluetooth Radon Detector

Overall Take

View Results on Your AppThis radon detector connects to an app on your phone so you can easily monitor and analyze results.

Experts Included
DWYM Tools Experts plus Radon Gas Detector Reviews, Alarm New England, Spy, CompetentReviews, Wiki EZ Vid, iMore and 1 more. Along with user reviews from Amazon.
Pros
" Our tests showed that the RD200 produced accurate results. The manufacturers claim an accuracy level of less than plus or minus 10%."
Cons
"At over $200, the device is a little pricey"
Don't just take for granted what one reviewer says. Along with our own experts, DWYM analyzes the top expert reviews of the leading products and generates a score you can actually trust.
16

Products Considered

We identified the majority of the radon detectors available to purchase.
9

Products Analyzed

We then selected the leading and most popular products for our team to review.

View All Product Rankings

31

Expert Reviews Included

In addition to our expert reviews, we also incorporate feedback and analysis of some of the most respected sources including: Alarm New England, Spy, CompetentReviews, Wiki EZ Vid, CNET.

14,871

User Opinions Analyzed

We also incorporate user reviews from the leading retailers including

Our experts reviewed the top 9 Radon Detectors and also dug through the reviews from 31 of the most popular review sites including and more. The result is a ranking of the best of the best Radon Detectors.

DWYM is your trusted roduct review source. Our team reviews thousands of product reviews from the trusted top experts and combines them into one easy-to-understand score. Learn more.

Don't Waste Your Money Seal of Approval
Look for the DWYM seal for products that are the best in their category.

The Best Overall

Elifecity Battery Powered Home Radon Detector

User Summarized Score

7.8
232 user reviews

Our Take

Radon levels fluctuate frequently, which is why it's so important to install a radon detector that can monitor the air in your home. Not only is this model easy-to-use, but you'll also never have to pay a lab fee to get results. All you need is two AA batteries and you're good to go!


Overall Product Rankings

Elifecity Battery Powered Home Radon Detector

1. Elifecity Battery Powered Home Radon Detector

Overall Score: 9.7
Reviews Included: 1

SafetySiren Pro4 Series Radon Detector

2. SafetySiren Pro4 Series Radon Detector

Overall Score: 9.5
Reviews Included: 1

Airthings Corentium Home Radon Detector

3. Airthings Corentium Home Radon Detector

Overall Score: 9.4
Reviews Included: 10

Radon Eye RD200 Ecosense Bluetooth Radon Detector

4. Radon Eye RD200 Ecosense Bluetooth Radon Detector

Overall Score: 9.3
Reviews Included: 10

RADEX RD1503+ Geiger Counter Radon Detector

5. RADEX RD1503+ Geiger Counter Radon Detector

Overall Score: 9.2
Reviews Included: 7

GQ GMC300EPlus Digital Nuclear Radiation Detector

6. GQ GMC300EPlus Digital Nuclear Radiation Detector

Overall Score: 9.1
Reviews Included: 6

Safety Siren HS71512 Pro Series3 Radon Gas Detector

7. Safety Siren HS71512 Pro Series3 Radon Gas Detector

Overall Score: 9.0
Reviews Included: 10

Pyle Premium Microwave Radiation Detector Meter

8. Pyle Premium Microwave Radiation Detector Meter

Overall Score: 8.7
Reviews Included: 2

KKmeter Electromagnetic Field Radiation Detector

9. KKmeter Electromagnetic Field Radiation Detector

Overall Score: 8.4
Reviews Included: 1

Our Radon Detector Findings


Elifecity Battery Powered Home Radon Detector

What We Liked: Radon levels fluctuate frequently, which is why it’s so important to install a radon detector that can monitor the air in your home. Not only is this model easy-to-use, but you’ll also never have to pay a lab fee to get results. All you need is two AA batteries and you’re good to go!


SafetySiren Pro4 Series Radon Detector

What We Liked: Seniors and individuals with reduced vision will love this radon detector’s large screen. Results are digital and there’s even a backlight to help you better see the numbers. The unit offers both short and long-term measurements, so you get a clearer picture of what’s going on in your house.


Airthings Corentium Home Radon Detector

What We Liked: Ideal for taking to new construction sites or areas without electricity, this detector is battery-powered. It generates results within 24 hours and you won’t have any lab fees. It’s ideal for long-term monitoring as radon levels fluctuate daily.


Radon Eye RD200 Ecosense Bluetooth Radon Detector

What We Liked: Understanding your radon test results is simple with the app. This detector provides a reading within 10 minutes and reliable results with one hour of using. It updates readings every 10 minutes so you can have constant accurate data.


RADEX RD1503+ Geiger Counter Radon Detector

What We Liked: Don’t worry about missing alerts — this detector has both vibration and audio options. It’s a highly portable device that’s easy to use. It can also measure x-ray radiation as well as the amount of radiation built up over time.

Our Radon Detector Buying Guide

Radon is a radioactive gas that is completely undetectable by humans because it is colorless and odorless. It is created when uranium or other radioactive materials decay and come out of rock formations, soil and specific building materials.

Just because humans cannot detect radon doesn’t mean it doesn’t affect us, though. In fact, it is blamed for over 20,000 lung cancer deaths per year in the United States and is the second-leading cause of lung cancer, after cigarette smoking. Exposure to this gas over a long period of time can increase our chances of getting lung cancer by 50%.

Toxic exposure from radon is most common in the northern, midwestern and southwestern states. However, this gas can be found all over the country. This is why it’s imperative to test for it in your home. If you’re buying a new house, be sure to test for radon there before you finalize the purchasing agreement. According to the EPA, one out of every 15 homes in the United States has high levels of radon.

There are a number of times when you should be testing for radon gas. If you’re buying or selling a home, always check for radon before finalizing any paperwork. If you’re buying a new build, ask whether radon-resistant construction materials have been used. You will also want to check if the building site has been tested for radon before. It’s also best to check for radon in workplaces as well.

A safe level of radon should be at 4 picocuries per liter (pCi/L) or lower. If it’s any higher than that, this means that you or your loved ones are at risk. Because radon is colorless and odorless, you need a special testing kit or detector to see whether it’s present.

Two main types of devices detect radon: passive and active. A passive device is a manual gadget that doesn’t require electricity. It needs to be placed at the testing site for a specified period of time, after which is is away for analysis. An active device is an electrical gadget that monitors radon continuously. It’ll monitor the level of the gas over an extended period of time and can detect abnormalities or any unusual activity in the gas level. Active gadgets also deter any test interference so that you can be sure you’re getting accurate results. While active devices are more costly than passive ones, they are far more reliable as well.

DWYM Fun Fact

There are many myths surrounding radon, so it’s critical to be aware of the facts. Some people think that radon tests are difficult to conduct and take a lot of time. The truth is that electric radon detectors make testing easy and quick. In many cases, they have automatic alerts to tell you when the gas is at dangerous levels.

Another common myth is that radon only affects certain areas of the country or certain types of homes. That’s not the case, as high radon levels are found all over the country in every state. The type of home you have doesn’t affect your radon levels and neither does your neighbor’s radon levels. You can have issues with this gas whether your home is old or new, drafty or well-insulated. Radon levels are mainly affected by the geology around your home, along with the materials and processes used in constructing it.

Some people feel that there is no point in testing for radon if they have lived in their home for a long time. Even if no one has gotten ill from radon, it’s still vital to test for it. By doing so, you can reduce the risk of getting lung cancer.

The Radon Detector Tips and Advice

  • The most important element to consider when looking for a radon detector is its level of accuracy. You want to ensure that the device is able to deter any interference so you can get reliable results. If you don’t get accurate test results, you or your family could be in danger of getting sick from the toxic gas. In order to get a reliable result from short-term testing, be sure to keep your windows and doors closed aside from normal use. Do not conduct your test when there are heavy winds as that can alter the results. Also, you will need to place the device at least 20 inches above the floor. It should be on a stable surface where it’s away from drafts, heat, humidity or outside walls. Remember to carefully follow the device’s instructions and record the day and time you began your testing.
  • Access to testing data is important if you want to analyze the results. Many electric radon detectors will have Bluetooth connectivity so that you can view the results on an app on your mobile phone. This makes it quick and easy to get results without waiting for a lab. In some cases, you can actually set up alarms on the app to go off if the radon reaches a toxic level. This is a good option for long-term testing.
  • For many shoppers, portability is key. When you’re testing a new building site, you may not have access to an outlet to plug in your radon monitor. This is when a battery-powered gadget comes in handy. Not only is it highly flexible so you can place it anywhere in the home, but you can use it within areas where you don’t have any electricity.
  • If you’re going to be moving the detector from place to place, also look at the size of the gadget. Some are small enough to fit in your pocket like a mobile phone, while others are big enough that you’ll need a bag to carry them around.
  • Having a clear LCD display that shows you the radon levels can be helpful. In some devices, the display is located directly on the gadget itself. In others, you can view the results through a mobile phone app. Consider what is more convenient for you before making a purchase.

About The Author

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Anam Ahmed 

Anam Ahmed is a copywriter and essayist based in Toronto. She has been writing on technology, travel, parenting, and business for over 10 years, and works with a number of high-profile organizations. She values finding the best products to make people's lives easier. Anam earned an M.A. from the University of Toronto and a B.A.H. from Queen's University. Learn more at www.anamahmed.ca.