If humidity in the house causes quite a bit of damage, the radon concentration is a much more worrying problem. This radioactive gas is the second leading cause of lung cancer in France. It is no surprise that each year, it causes 1,000 to 3,000 deaths.

Despite the seriousness of the situation, many households do not give it enough importance. Some do not even realize the presence of this gas in their homes. To know the radon level in the house, it is necessary to use a device designed for this purpose.

It is in this context that a radon detector comes into play. If you want to learn more about this device, we invite you to discover this article.

What is a radon detector?

Also called a radon detector or dosimeter, a radon sensor is nothing other than a measuring instrument used to assess radon gas levels.

Just like a carbon monoxide detector, its use is of paramount importance for your protection and that of your family.

It is essential to specify that radon is a radioactive gas that is particularly tasteless, invisible, and odorless. It is therefore impossible to detect it by sensory perception. Only a radon detector can confirm the radon measurement in the house. It provides reliable data on the minimum test spread concentration across seasons radon levels.

Using the detector, one can avoid high radon gas levels that represent a health risk exposure for occupants. Also, it is possible to know whether the house is well ventilated or not.

Sometimes, people tend to use a dehumidifier indoors to fight humidity problems. But with radon, this device cannot suffice to control its spread. It needs good ventilation, because a closed space optimizes its accumulation to reach a significant radon concentration in the ambient air.

Comparison of the best radon detectors: our top 10

Even if we renovate the radon column floor or use a polyethylene vapor barrier membrane slab, the use of a radon sensor or radon detector is undeniably useful. It allows for more precise measurement of the radon level in the house.

The table below summarizes the 10 best radon detectors on the market. To learn more, you can discover the description of each product there.

Product Name	Power Supply Type	Dimensions	Weight	Price in Euros
SAF Aranet Radon Detector	7-Year Battery	7.7 x 7.11 x 7.11 cm	217.72 g	225.25
Airthings 2930 Wave Plus – Radon and Air Quality Detector	2 AA batteries	12.07 x 12.07 x 3.56 cm	217.72 g	180.23
Corentium Home Airthings – Digital Radon Detector	2 batteries	11.9 x 6.9 x 2.6 cm	150 g	186.41
Airthings 2960 View Plus – Radon Detector	6 AA batteries	17 x 9 x 3 cm	360 g	261.47
HOUND-1011S Portable Radon Detector	Rechargeable Battery (USB-C)			95.26
Airthings 2950 Wave Radon – Smart Radon Monitoring	2 AA batteries	12 x 12 x 3.6 cm	334 g	189
RadonTec | RadonEye-Set RD200	Electric Power Supply	‎ 8 x 8 x 13 cm	249.48 g	198
X-Sense Radon Detector	Battery Powered	9.7 x 7.6 x 8.1 cm	471.73 g	89.17
LifeBasis Radon Detector, Radon Gas Detector	3AAA Alkaline Battery	14.9 x 8.3 x 3.7 cm	200 g	129.99
RM-73 Radon Detector	Battery	7.9 x 7.9 x 13.3 cm	430 g	99.59

SAF Aranet Radon Detector

The SAF Aranet Radon Detector is an indoor air quality monitoring device designed to continuously measure the radon level in the home. It offers quick readings every 10 minutes, allowing effective detection of concentration variations. In addition to radon, it also displays temperature, relative humidity, and atmospheric pressure, providing a comprehensive view of the indoor environment.

Equipped with a low-power e-ink display, this Aranet detector stands out for its exceptional battery life of up to 7 years. It can be used in portable or fixed mode and connects to a free app, facilitating data tracking and risk analysis related to radon.

No products found.

Airthings 2930 Wave Plus – Radon and Air Quality Detector

Airthings continues to impress the public with its innovative products. This home radon detector includes a practical app that allows you to connect it to your smartphone via Bluetooth. 

It also provides you with an online dashboard offering advanced analyses. Through this app, you can check the air quality in your home at any time.

Battery-operated, it can be used anywhere without cables or outlets. The batteries included with free delivery have a long life of up to 16 months.

No products found.

Corentium Home Airthings – Digital Radon Detector

The Corentium sensor can provide you with extremely precise radon gas level readings. The results are displayed on its LCD screen for better visibility.

Since radon concentration in the air varies according to multiple parameters, the device can continuously and long-term evaluate it. It is powered by 3 batteries with good autonomy lasting up to 24 months. Many professionals use it during real estate inspections.

No products found.

Airthings 2960 View Plus – Radon Detector

This Airthings model stands out for its multiple functions. Besides being a radon detector, it allows you to assess carbon dioxide, humidity, volatile organic compounds, atmospheric pressure, temperature, and also PM2.5 or fine suspended particles.

Connected to WiFi, it gives you access to all useful information remotely. In case you encounter difficulties during use, you can contact an Airthings expert team via live chat or email.

No products found.

HOUND-1011S Portable Radon Detector

The HOUND-1011S Portable Radon Detector is a device designed for radon monitoring in the home, especially in basements and poorly ventilated spaces. It uses a high-precision sensor to measure radon concentration in pCi/L or Bq/m³, thus providing a reading adapted to international standards. Its compact and lightweight design makes it easy to move and use in different rooms.

This portable radon tester includes audible and visual alerts to quickly signal high levels, helping to react effectively in case of risk. Designed for long-term monitoring, it is a practical solution for individuals wishing to control indoor air quality without complex installation.

No products found.

Airthings 2950 Wave Radon – Smart Radon Monitoring

Compared to other radon detectors from the Airthings brand, this product offers an interesting value for money.

Despite its various strengths, it comes at a reasonable cost. The radon measurement response can be reliable whether it is a short-term or long-term detection.

Easy to use, this instrument is powered by 2 AA batteries which are included with free delivery. Thus, there is no need to use an electrical outlet or cables.

No products found.

RadonTec | RadonEye-Set RD200

Compared to radon detectors in the same category, this product detects radon gas precisely, quickly, and effectively. Its power notably comes from the integrated ionization chamber.

Using Bluetooth, you can connect your smartphone to the sensor to read real-time measurements of radioactive gas in the air of a dwelling. It suggests an update every 10 minutes.

This detector also gives you the opportunity to set the alarm value for radon gas. And when it exceeds the limit, it immediately emits an audible and visual signal.

No products found.

X-Sense Radon Detector

The X-Sense Radon Detector is an indoor air quality monitoring device designed to accurately measure the concentration of radon in the home. It includes audible and visual alerts to quickly signal high levels, as well as a one-touch reset system to facilitate data management. The screen also displays temperature and humidity, providing comprehensive environmental monitoring.

This X-Sense radon detector can store up to 99 local reports, allowing analysis of measurement trends over time. Compact and easy to use, it is suitable for continuous monitoring in living rooms, basements, or cellars without complex setup.

No products found.

LifeBasis Radon Detector, Radon Gas Detector

To detect the presence of radon gas in the home, this product is extremely effective. It continuously monitors and displays the radon levels so you can take better measures to improve air quality.

The detector is equipped with a large screen allowing easy reading of the average gas value over the short and long term. It is advised not to move it during the test. When you plan to replace the battery, be aware that this action resets the device, erasing the stored data.

No products found.

RM-73 Radon Detector

The RM-73 Radon Detector is a device designed for long-term radon monitoring in the home, especially in sensitive rooms such as the basement or poorly ventilated spaces. It measures concentration in Bq/m³ or pCi/L, providing precise readings adapted to various standards. Its color LCD touchscreen facilitates data consultation and navigation through settings.

This RM-73 radon detector includes audible and visual alarms to quickly signal high levels and improve indoor safety. Easy to use, it allows continuous air quality monitoring with clear readings for better risk prevention.

No products found.

How does a radon sensor work?

At some point, we renovate the radon soil column to combat the radioactive gas. Other households use a polyethylene vapor barrier membrane under the slab.

In any case, the use of a dosimeter can always seem essential. It allows for the reliable and precise detection of the radon content in the home.

This measuring instrument works like a camera when it collects light photons. Once installed in a risky room, the dosimeter’s film is struck by the radioactive alpha traces released by the radon gas.

A chemical process interprets the actions on the film and then these are evaluated in a laboratory. This allows for detecting the radon gas levels in indoor air. This measurement will be expressed in becquerels per cubic meter.

In practice, the radon detector quantifies the alpha particles of radon gas in each air sample it studies.

Many calculations must be performed. Another one will be done every hour. This is why there is always a recent update of the averages of the radon measurement.

Why is it important to measure radon levels in your home?

Radon results from the decay of radium as well as uranium. These metallic elements are present in rocks and soil. In open air, its quantity seems insignificant, thus harmless. This is not the case in confined spaces. Home radon measurements reach worrying concentrations especially during prolonged exposure.

Radon gas can infiltrate through any opening in contact with the ground. Most of the time, it enters the dwelling through cracks in the wall, porous flooring, or drainage pipes.

The problem is that we are dealing with a tasteless, invisible, and colorless gas, but which is very dangerous in high doses. It indeed becomes impossible to see its presence inside a building.

To ensure the safety of occupants, nothing beats using a radon sensor or radon detector. It is the most suitable measuring device for performing the radon test. This equipment allows you to obtain the most accurate radon content in the home.

Comparison of radon measurement solutions

Type of sensor	Operating mode	Measurement duration	Advantages
Passive dosimeter	Laboratory analysis	2 to 3 months	Very economical, official value
Digital sensor	Real-time screen	Continuous	Immediate alerts, peak monitoring
Connected sensor	Smartphone application	Complete history	Trend analysis and graphs
Professional analyzer	Certified diagnosis	7 days	Surgical precision before work

What criteria should you consider before buying your radon sensor?

When you purchase a hygrometer, anemometer or even a silicone gun, some parameters must be scrutinized. It is the same with the radon detector. It is important to start by analyzing the different models.

If you want to know the radon rate from 1 to 12 months, opt for a passive radon sensor. It operates with a rather long term between 2 to 3 months. 

Conversely, a radon detector with electronic measurement can offer you a shorter radon test such as 24 or 48 hours. A sophisticated model, it is capable of regularly informing you about the radon content in the home.

Also try to analyze the product’s power supply. If you move around a lot, a battery-powered model will suit you very well. If you use it in private rooms, nothing beats the wired dosimeter.

Some enjoy innovative technologies and others do not. For more convenience, opt for the first example. Although it is sometimes expensive, access to information can seem fast.

Where is it recommended to place a radon sensor in a home?

To fight against humidity, multiple measures are discovered to take. If your neighbor lives in a risk area, suggest a polyethylene vapor barrier membrane slab. Also, there are many measures to apply to combat radon gas.

Let’s renovate the radon soil column since it enters inside by passing through the pores of the basement soil of the house. Regardless of the solutions, it is essential to determine the radon gas levels using a dosimeter. To obtain better results, it must not be installed just anywhere.

Specialists recommend placing it 1 or 2 m above the ground preferably in the basement or on the ground floor. Please remove any object that might obstruct air circulation.

The radon detector must not be exposed to sunlight. Install it away from drafts and heat sources such as the fireplace or radiator. It should ideally remain in the same place for 2 or 3 months since these constitute the minimum test duration for radon equilibrium.

Choose a place where the device will be out of the way of occupants and children. It is preferable to place it on a flat surface, for example on a shelf or table. Likewise, you can hang it on a wall or ceiling.

The months from October to March are perfect for using the dosimeter. Detecting the seasonal equilibrium concentration radon levels is ideal during winter.

How to use a radon sensor?

No matter the radon soil column to treat, this measuring instrument is capable of providing you with accurate and reliable data. However, it is essential to use it properly.

Upon free delivery, the radon detectors are often provided in an aluminum pouch. To use it, first remove its packaging. Then just follow the detailed instructions in the manual.

Find a place to install the device. It is preferable to place it in the lowest habitable area of the dwelling. The basement is the most recommended place by specialists.

The minimum test duration for radon concentration equilibrium is generally 3 months. You can therefore forget about it and let it do the work on its own. 

After this period, you return to the radon sensor and send it back to the laboratory. After 1 to 1.5 months, you usually receive the results by mail.

How long should a radon sensor be left in place to obtain an accurate measurement?

Unlike other measuring instruments, the dosimeter does not require your intervention to perform the recognized leed radon test. Once properly installed, it takes care of all the work and you can attend to other matters.

Make sure to find a good place to store it. Be sure to choose a location away from pets and children so that no one removes it from its place.

You can then leave it for one to three months so that it can perform its functions on its own. On some models, it is possible to leave it in place for an entire year. Avoid moving it during the minimum test duration.

How much does a radon detector cost?

Radon detectors are available at various price points. Due to this variety, there is something for every budget.

If you plan to make a significant purchase for a dosimeter, you will get a high-quality model that benefits from cutting-edge technology. Some models are priced at over 300 or even 500 euros.

But if you only use it occasionally, you can choose a classic model that is affordable for everyone. Its cost ranges between 100 to 200 euros.

It should be noted that other expensive radon detectors are not necessarily of good quality. It is possible to find affordable products with many interesting features. The important thing is to find an item that meets your needs.

How to interpret the results provided by the radon detector?

When the average seasonal radon level in indoor air rises, this radioactive gas becomes harmful to health. However, if one does not understand the radon test results, they are far from imagining the risks involved.

Radon concentration is expressed in becquerels per cubic meter or Bq/m3. When the measurement exceeds the level of 300 Bq/m3, it is important to take action.

On the other hand, a value below this threshold does not necessarily require specific legal intervention. After remediation, the radon level in the house to be achieved is 100 Bq/m³.

If the radon measurement is above 1,000 Bq/m3, it is urgent to call a professional. Their intervention must be immediate to reduce the minimum average concentration of the gas in the air.

What measures should I take if the radon level is high in my house?

After the radon test during the winter season, you are informed of the importance of the radon gas levels in your home. To get rid of it, you are invited to apply certain measures.

First, ensure to optimize ventilation throughout the house. Seal cracks in the floor slab or foundation walls. Likewise, block gaps near connections such as ducts or pipes.

Regarding the depressurization system, it is a passive solution involving the installation of a radon evacuation pipe that resembles a plumbing stack. This mechanism aims to expel radon.

To improve the airtightness of materials, installing a polyethylene vapor barrier membrane on the slab is an interesting solution.

It prevents water condensation infiltration into the walls. It is recommended to apply these measures during the winter season.

How often should I test my house for radon?

According to Health Canada, a minimum radon test should be conducted every 2 years. In the case of new construction, it is always wise to gather information about the radon gas levels in the area.

Although this gas is widespread throughout France, some areas have the highest radon concentration. Their soils are particularly volcanic or granitic.

And if you plan to build a home there, it is best to seek advice from a professional to limit the risks related to radon.

Advantages and disadvantages of a radon detector

Radon is a potentially dangerous radioactive gas at high concentrations seasons radon levels. It is one of the causes of lung cancer that takes the lives of countless people every year.

To avoid the worst, it is crucial to use a radon detector. It is used to assess the true radon gas levels inside a home.

This gas poses a much more insidious danger. Since it is both invisible and odorless, occupants are unaware of its presence.

In order to make timely decisions, it remains necessary to know the radon level. With the dosimeter, you can carry out a recognized Leed radon test on existing soil.

With a single device, you can analyze the amount of radon gas in several rooms of a dwelling. With some models, they are able to provide you with results after 1 to 2 days of placement.

Others also allow you to obtain a lot of information such as carbon dioxide levels, atmospheric pressure, humidity, and many others.

Despite its usefulness, it must be admitted that the dosimeter has some limitations. It must be installed in a strategic area to obtain excellent measurements.

If you place it in the wrong locations, it may alter the data. The radon test response will become a matter of doubt.

Radon sensor: Review and comparison for a healthy home

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