Ecosense RD200 RadonEye, Home Digital Radon Detector: Fast and Accurate Detection of Fluctuating Radon Levels, Short and Long Term Continuous Monitoring with Trend Charts

Live in a high radon area and failed old style charcoal canister test. Hoped I solved problem by finishing basement and installing vinyl sheeting behind the walls to stop air intrusion. Never retested until I read about about this radon detector in Times magazine review of top 100 new products of 2021. Readings in unfinished furnace area were consistent with earlier charcoal canister test. Reading in finished basement were cut in half but still over threshold for action. Will follow up with radon mediation contractors for estimates. What a GREAT product and I believe worth the much greater initial cost compared to mail in canister tests. You can easily make multiple tests over multiple days to see how readings fluctuate over time and quickly get results. It would cost more and take months to do this with the mail order tests. I have recorded the results from two day tests at different locations in my basement using the Ecosense app. This requires some renaming and storing of files using the app that maybe too complicated for some users since there are no step by step instructions provided. A simple alternative is to just record “screen shots” of the graphs and store them in your photos instead of on the app. I plan to redo the tests after remediation and use the before and after results to share with contractor as needed. I am also now doing similar tests throughout the first and second floors just to see if heating or air conditioning disperses radon gas throughout the house. This is the most extensive review I have ever written on Amazon. Since it really does impact your health and for anyone (like myself) who reads these reviews to try and make an informed decision, I want to pass along several other factors that impacted my positive review both before and after the purchase. I purchased this product instead of the slightly cheaper new model (EQ100 Cube) that was reviewed in the Times magazine article after reading Amazon reviews for that product. I liked the idea of not having the RD200 connected to the internet and not having results stored on-line with address information as in the EQ100. Some reviews of the RD200 from 2017 mentioned the need to provide average and peak values for the measurement interval, I was pleased to see that the manufacturer now provides this for the measurement interval. In addition, I was also concerned that I would only be able to store 1 years worth of data with the RD200 compared to 5 years with the EQ100. That is not really a limitation with the RD200 since you can delete the readings on the device after you have downloaded then to the app.

This unit (RadonEye RD200) is very easy to setup, and gives you accurate results fast! Your first reading in 10 minutes and a very accurate reading after your first hour and every hour! It actually measures 30 times an hour and gives you detailed charts of all your readings in the app for your phone, and also displays the highest detected Radon level. I love that it shows the level of Radon on the unit itself too so if you are near it and just want to see what it says, it’s right there…no need for your phone or internet access, etc. You can see even more details on the app via Bluetooth so you can see your results on your phone without having to be right at the unit as well. Another huge benefit is that you can set it to alarm at any level, or not at all… (default is 4). I prefer to have it alert me if radon goes over 3. Most importantly it works accurately and fast! Other brands typical take 48 hours before your first reading and then don’t give you detailed results, but instead only give an average sample. They will still help, but this is much more detailed, fast and accurate all in one! The only thing I wish it had (with the detailed graph chart) was times of all the readings. It shows you all the levels, and the peak level and average level, but not what time they occurred. Other than that, I highly recommend this product!

We bought a house and discovered we have a radon problem using a Corentium radon detector we bought on Amazon. It works fine, but only gives a near term reading and a 7 day average reading, and it takes a full day before giving results. Based on the Corentium detector we hired a radon mitigation contractor who installed the typical plumbing and fan, and using his own detector, he measured safe results and declared victory. Enter Radon Eye. We put this device in the living area where we would spend time, and quickly discovered that the levels were way above the readings the contractor had found. When we confronted him, we learned he had put his meter in a different location, and since we wanted all the rooms to be safe we had him do additional work, after which we put his detector side by side with our Radon Eye. Both produced the same results and we found that his work did not get the job done. We would have been exposed to very unsafe levels (over 20) if we had just trusted him the first time around. This is a reminder that “ignorance is NOT bliss”. He came back several times and tried different things, and none were successful. So after “investing” over $2000 in someone who was not an expert, we searched for and found someone who runs his own company and is an expert. Whereas our original contractor would send in his laborers and stop in occasionally to tell them what to do and then leave, the second gentleman spent half a day with us, discovered that the work done by the previous contractor was incomplete and totally inadequate, redid it, and now our radon levels are well within the safe range. Had it not been for our Radon Eye and the capability it provided to fully verify and document results, we would have been exposed for long periods to very unsafe radon levels. So, needless to say, we love our Radon Eye detector. It works perfectly, requires no attention or maintenance, and it gives a reading very quickly. Moreover, the graphical presentation in my phone or tablet makes it very easy to verify that the radon level is staying at safe levels. It is not a stretch to declare that this device has saved lives.

A few days later: After running the new device for a few days, I could get the 1-day average which was much better in agreement with my older device, 0.81 vs 0.96. This is within 10%. The individual readings are quite different. Since they are not synchronized in time and could be as much as 5 minutes different, the fluctuations could be actual radon fluctuations over a period of a few minutes. Bottom line, use the 1-day average. 3 months later, I have purchased a third copy for another family member and have found the readings very different from the first two. This new device reads half the amount of radon 0.61 compared to 1.07 on an older device 3 inches away. This means that when the actual radon count is dangerous at 4, this new device will only be reading 2 (no action required). This almost factor of 2 discrepancies is in comparison to the lower of the original two devices. The bottom line is that I cannot recommend the Rapid Eye RD200 for reliable use in detecting radon. My advice, if you have one of these devices, is to calibrate it by getting a professional test for comparison and correct the future readings accordingly. I am reducing my rating to 3-stars based only on ease of use, not accuracy. If I can, I will return this particular device. Very disappointed. Basically, do not bother to buy these units until the manufacturer improves the calibration to within the stated 10%. I am removing 1 star because the stated 10% calibration accuracy is clearly wrong. My two units side-by-side have maintained an offset from each other of about 20%. This is disturbing since a sample of two units does not tell you much about the behavior of a large number of units. The spread could be worse. However, the relative measurements for any one unit, day by day, seem stable and its ability to detect changes in radon levels seems quite good. The manufacturer needs to do a better job calibrating the units other than just giving a certificate that states nothing factual about the particular unit. At a minimum, I would like to see a random sample of at least 10 units with the mean and standard deviation given. This is a South Korean made radon detector that is calibrated and well designed. The technology is the same as very expensive professional detectors. Setup is very easy including downloading the app and linking via Bluetooth with the detector. Data download is easy. The phone Bluetooth readout is solid with the first reading after 10 minutes and the first accurate running average reading after 1 hour. The device has its own data display that is clear. On the above ground floor, the device read 0.4 out of 4 and in the basement is reads 0.9 out of 4. The level 4 is the level at which action is necessary. Accuracy is stated within 10%. Long-term accuracy should be much better. I will come back to this review if there are problems. This appears to be a very good purchase compared to anything else in the consumer market. After 1 day, 2 of these side by side devices read 1 hour averages of 2.28 and 1.84 pCi/l. That is a little bit outside the 10% stated accuracy.

I own EcoSense RD200 and another popular radon detector. The RD200 has a larger detection chamber and is able to make more precise readings, faster. To their credit, both devices make the data available to hobbyists and 3rd party developers through a bluetooth API. While other device smears the data using a rolling smoothing function, the EcoSense RD200 publishes both raw and calibrated readings. In fact, you can follow along as it counts the individual scintillations, and visualize them in any way that delights your inner nerd. Estimated radon levels are published every 10 minutes, and improve with time. Radon levels in my location are quite variable by time of day, weather, etc. I am delighted to see these trends in near-real-time from the RadonEye, all the way down to the nitty-gritty of graphing the velocity of raw counts. The other device is only suitable for tracking longer-term averages, not hourly variations. I love this device and I will buy more over the holidays for family and friends. I commend EcoSense for making the data available over bluetooth. I encourage them to publish a document completely describing the bluetooth API, and perhaps publishing reference code.

I am working as engineer in development of similar products (alarms and indoor climate rcontrol). Last year I bought product of Airthings because my house is located in an area with pretty huge of the radon activity. So I have more one year experiency with this product. It is good product for end user. It gives good and easy read out information. If you are not pushing for fast results this product gives you information what you buy for. But my expectations are little bit higher and I need faster information to be able to recognize in few steps where is radon source and base on this to do some measures to mittigate this. I have levels in my house within 100-400Bq in living part of my house and also above 1000Bg in pillar and other technic rooms located underground. Fortunately there are no hallway between and these spaces are separated by a radon insultion. Depends on wheater conditions is possible to measure level as 5000Bq (!!!) it is temporary but in coherence with weather. So why I am writing about - because this product fulfill my expectations well and it is really able to find a source of problems. I also did some easy comparations with Airthings product and have to say that results are fully within my expectations. First feeling was the same in plenty of commnets giving low ratng for this product, but after long period observation the results are comaprable. Is necessary to take into consideration that these products (both of mentioned) are consumer electronics not equipments for a laboratory or scientific measurements. In this price level it could be sign as one of the best products. In comaprison with Airthing there would be fine to do some improvement. But also Airthings App has its own cons e.g. graphs readibility for weak eyes (my case). One technic information at the end of my quite long assesment (sorry for that). The physical principle of radon activity detection says that the bigger detection chamber the better and faster results are. Radon Eye has few times bigger chamber in comparisson with not only with Airthings but maybe among of all in this level of comparable end user oriented products.

This unit is easy to set up, connects to your phone quickly, and provides very precise continuous monitoring of radon levels. We have a split-level home and our master bedroom is in the finished part of the basement. We live in Ohio which has some of the highest radon levels in the nation so I thought this was worth the money. I'm very glad I bought this- I had used the little charcoal packet that you mail in to a radon service twice before and both came back within normal range. The problem is radon levels fluctuate throughout the day and through the seasons and weather. This device let me know our radon levels got as high as 14, and sometimes remained there. I had a radon mitigation system professionally installed and our levels rarely go above 1 now. The EPA recommends you take action for levels above 4, while the WHO recommends keeping levels below 2.7. You can see my radon levels in the included screenshot and see how they dropped when my radon mitigation system was installed at around the 4,000 hour mark. You can connect via bluetooth to an app on your phone for real-time monitoring and to download a data set of all past levels. My only complaint with this device is that the data download has no date or time information- just number of hours elapsed since the device started monitoring (see included screenshot). You could figure out the times but it would require a lot of tedious math and backwards counting. I believe this could be a very simple fix from the designer. I'm very disappointed he has not added this feature. Besides tobacco, radon is the top cause of lung cancer in the U.S. I am an oncology nurse and I can't tell you how many lung cancer patients I take care of that have never touched tobacco in their life. This device is well worth the money to protect you and your family from this odorless, invisible, slow-killing poison. The EPA and CDC estimate radon kills more people every year than drunk driving.

Bought this to monitor a system we had installed. Works great