Moved to a new home in Northern Utah and decided I should get up to speed on Radon and wanted something that would give me real time data so I could see what actions affect my readings and the RadonEye has not disappointed. The only, and I mean ONLY critique I have is that there should be a way to silence the “beep” that reports when you connect to it via Bluetooth. My boys have their rooms in the basement and I’m monitoring levels mostly because of their exposure time being so great and I like to check in on it late at night before I go to bed but when they are already in bed and it can get their attention when a beep rings forth in the otherwise silence!

I bought this unit because we were finishing our basement and my kids were going to be spending a lot of time down there. I wanted to see what the radon levels were. Set up was easy peasy and it seems to work great! It samples every 10 minutes and plots the values out on a chart. It also tracks peak value, 30-day average, and 1-day average. It showed that the radon values in my basement weren't considered drastically "unsafe" per US standards (over 4.0 pcl), but it was higher than what I was comfortable with so I had a company come and install a radon mitigation system. After that, the unit immediately started reading much lower levels which was great for my peace of mind. Overall, seems like a great product which I have recommended a few times to others. Way better than those one-time, set it out then mail it in tests that only show one reading. If you want to know exactly what your radon levels are at any given time, buy it!

The Radon Eye has worked well for me over the 3 weeks that I have had the product. Both the LED display and phone app provide useful data. The logged data is especially useful to observe radon level trends. While the logged data can be displayed in the app being able to transfer the logged data to a computer and to import it into Excel is nice as it allows you to manipulate and process the data however you like. The fast response time of this product allows for meaningful readings of short term variations of radon levels. The Radon Eye's current reading on the LED display and logged data points are rolling 1-hour average values. The other radon meter I have used (Pro Series 3) requires 48 hours of data to provide an accurate reading and it only displays 1 week averages for its short term output. That long averaging period makes the Pro3 less useful in correlating events that cause rises and falls in radon levels. The one week average values from the Pro3 appear to track reasonably well with the 1 week averages from the Radon Eye. I have observed that short term variations are strongly tied to weather conditions. Cold/cool mornings and rainy periods appear to correlate to significant rises in radon levels. I have only used the product in one location so far (living room), but may relocate it once a longer period of data collection has occurred.

I bought two Radon Pro3 detectors before this one several years ago. They both work very well and show an almost identical Radon level. We tried another brand (batteries powered) before, and somehow its readings were always too low to believe. Radon Eye doesn't have this kind of problem. Radon Eye RD200 is very convenient and accurate readings as the same as the other two. The Bluetooth connection is very reliable to our iPhones and fast because it is running on a power cord. the only drawback it can't hang on the wall.

Had another brand previously, that would emit loud screech if it was above 4.0 and wouldn’t log the data. This is a much better product. Samples every few minutes so you can track daily fluctuations and log. Easy to reset the log, so you can move locations and test where in basement you have the highest levels. Works great! I bought a pair and they are very close to synchronized with their readings. Bluetooth feature and app is amazing. Would recommend anyone with serious radon issues buy one or multiple and place in basement! Highest possible recommendation.

Without another accurate Radon detector with which to compare, it’s hard to tell how accurate this one is but the readings have been consistent since it was activated and it makes sense that the average is in the low 1’s in a newly constructed home built with radon barrier/exhaust. This device gets high marks for being easy to read and understand as well as being able to access it on the iPhone and iPad. I rated down one star on ease of use since the included instructions were unclear about which app to download for use - the third one I tried “RadonEye” (not Plus) was the correct version and it worked instantly once I used that.

Very simple to use and gave us the same readings as the test kits we had just used. This cost less than having someone come out and test for you. And, the beauty of this little gem, is I got to test my son's house too. We will be having remediation done on our house because of the high readings and it will be nice to check on the system installed to see if it works. Most new homes built these days are so tight in construction that it is almost impossible not to have high radon readings in many parts of the country.

Did a lot of research on Amazon before buying this device. I formally had the carbon short-term test done to my home office in the basement. The results came back 1.6 and 3.9 next to the sump pump. Measured this in summer and the numbers were already borderline for mitigation. I just couldn't imagine what the readings would be like in winter. Since I spend 8-10 hours a day in the basement, I thought it would be a worthwhile investment to purchase this. I am not disappointed. Provided readings within 10 minutes. It peaked around 4.5. I was able to measure the affect of the air composition when I opened the basement windows. After several hours the radon levels went down to 0. So opening the windows does actually help. Thanks to this fast response device, I will move my home office upstairs to avoid further exposure. I will continue to open the windows daily before we install a permanent mitigation solution. I really like the fact that it stores up to one year of data to measure both the mid term and long term averages. I can see the data points on my phone for the hourly average. Setting it up was really easy, just plug it into the wall and download the app (optional). No pairing required, it just picked up the device. As for shipping, it was fast and came within 2 days.

During my home inspections prior to purchase my inspector found my radon levels elevated, so purchased this to monitor my levels prior to remediation. Turns out this device is very accurate in comparison to the two professional hired out tests that were preformed in my house. The device beyond plugging it in, and pairing their mobile app with the device over bluetooth it was up and running within minutes. Really love this and will continue to have it run all the time in my lower level to ensure my radon levels stay low also awesome I can get my reading from my phone. I love the graphs it produces as it stores all the data it gathers to show the long term averages of your radon numbers.

very easy to install and connect to phone, love the app which can show history data. I did a lab test to confirm the reading and they match very well. never have to worry about radon anymore

Initial impressions going on 3 days use: Came packaged like an apple product - nice. Set up was a breeze. Plugged it and, then downloaded app and one tap connect by blue tooth. First reading in about 10 minutes. Works as advertised. The app is simple, allows you to switch between units, adjust alarm (on/off, alarm value, and interval). Main page shows current reading, day average, and month average. Plus current measurement duration. Will update later. Concerns so far: 1. Quick set up instructions were clear. English user manual was not - i am guessing it was written by a Korean with english as a distant second language. 2. Documentation states the sensor calibration is only good for 2 years. Nothing in the documentation about what to do after 2 years - recalibrate or throw it away? 3. App - Main page of app has a lot of unused real estate - which is frustrating since much of the info displayed is in very small font (other than current reading). Would love it if they would increase the font and clearly display all info. You can see a graph of data, but no way to share the data except through itunes. 4. Unit - only complaint so far is that it needs to be plugged into an outlet. I'd prefer battery power to make it easier to place this where i want and in case of power outages. All in all, happy with purchase so far.

I am finishing my basement and wanted to know my radon level as I will soon be spending more time in the basement. All you have to do is plug in the unit and place it where you want to get a reading. After about 15 min you will get your first reading, however, it is best to let it sit for a day and then observe the average. The accompanying app makes it very easy to download a graph history of your radon levels. I found out that the radon in my basement was above 10 pCi/L. This is well above the US EPA safe threshold of 4 pCi/L. As I am not particularly interested in me or anyone else in my family getting lung cancer, I had a radon fan installed. After installation of the fan, I used this RD200 to observe the efficacy of the suction fan. My radon dropped from 10+ pCi/L to 0.6 pCi/L. More important to this review, the reading on my RD200 matched the reading on radon mitigation company’s professional radon meter. I feel very confident the radon measurements from this unit. I also like that this unit has an alarm if the radon level exceeds a set value (mine is set to 4 pCi/L). This unit gives me piece of mind that my family is not breathing dangerous air.

I use this device to continuously monitor radon in a house with significant radon risk. Most importantly, I had a professional home inspector drop off a monitor and was able to validate this results of this device against a calibrated unit +/- 5%, close enough to call it perfect. For the cost, you can't beat it, I'd recommend testing this device with a calibrated unit to make sure. But once that's done it's invaluable, particularly in my case as I built a DIY radon abatement system (which worked in bringing my levels from 72pC/l to ~1). A python api is published as well, so I use a raspberry pi to pull readings and post them to a website so I can share my triumph against radon with friends.

Easy setup than other brands and priced fairly. Check it daily/weekly and feel it’s accurate against other radon testing levels.

Easy to use. Wish I had known about this sooner. I was buying short term tests for $15 and paying shipping to the lab. With this I know my number daily.