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

Works like its supposed to. Our home is crazy high during the colder months here in the upper mid-west. My wife and I lived here for 37 years and have had no related health issues from radon. If you buy this and your home has detected high levels I wouldn't be too concerned about it. There's a lot of fear over radon levels in homes these days but I feel it's overblown and another way for companies that install the expensive radon air mediation systems to make money. IMO spend your money elsewhere.

Works great! Has excellent Bluetooth range and the app. is nice. Only complaint is the historical data points that get saved don't have time or day stamps. If they update the software in the future to timestamp each data point collected you could view trends such as time of day when readings spike. I use with my DIY installation of a radon fan and it works great for watching radon levels.

For the exact same period, about a foot away from each other, the RadonEye said average radon 1.42, and my canister test results from the lab were 1.4, so spot on. That is after using the RadonEye for a few months too, so I'm happy. (Also happy that my new radon mitigation system dropped it from 15.3 in March, but not sure how much of the drop is seasonal)

Update: I'm 3 years in with this device. I work out of my basement and this has given me peace of mind. I love being able to see the fluctuations in such a responsive way. Since this gives you readings every 10 minutes you can see how opening a window, door, etc impacts your radon. It is a fantastic device for diagnosing and testing mitigation. Over a year I have had readings ange from 5 down to 0. It is scary when you see the high readings, but the average is what counts (mine is under 1). I will definitely buy another, or the Ecocube if it has the same sensor.Original Review: FIRST OFF something to keep in mind when looking for a radon monitor. ANY consumer radon monitor you order is a roll of the dice when it comes to accuracy. It will be within tolerance, but you could end up on the far side That is one of the reasons they are so cheap. You are NOT getting the individual device calibration that is done on professional radon monitors. Again, the "sensors" will have variances (within tolerance) when manufactured and if you want the most accurate results then you MUST get the device calibrated. There is a reason they require professional monitors to get re-calibrated. There are a lot of variables that will cause the readings to change over time. With that in mind, any consumer radon monitor you purchase has the risk of being way off. It isn't that the device is necessarily faulty (although it could be), or somehow flawed. It is most likely because it was never calibrated after manufacture and the sensor in your device had something on the far end of tolerance during manufacture. If you find that the one you ordered is way off compared to a 24 hour professional (calibrated) test, then order a replacement. Simple.TIP: Quit moving the device all over the place and LEAVE IT ALONE FOR 24 hours.Now for my review...I researched, and researched until I landed on the RadonEye. What decided it for me was that the sensor is an ion chamber type and is the EXACT same sensor that they use in their professional grade radon monitors. You are literally getting the exact same sensor as the $600+ model (just without the calibration).I have read several reviews where people are complaining about the readings being too high. I would ignore those reviews IF there is no mention of how much time the device was in a single location. The reading on the display is the average for the hour (updated every 10 minutes). That is one of the things that makes this such a great monitor. You can see the shifts in detail. This is also the problem. You have to be patient. I got all worked up when I first got this device running. I had really high readings. Once I calmed down, and let it run for an entire day, I could see how the readings would fluctuate throughout the day. They also seemed to "normalize".So here's the deal. You have to leave it in a location for AT least a 24 hour period to get a good picture of the readings. The time of day, temperature, and weather can impact the reading. it will change over the day, sometimes by several points. You can't just take it to another room and wait for it to update in 10 minutes and expect an accurate reading. If that was all you need then why would it be recommended that radon test be done over the course of several days/months? Last, PLEASE don't compare it to some other consumer radon monitor to determine if it is accurate. You are only kidding yourself if you think that is going to tell you something helpful.I'm tired of writing so now for a pros/cons list.PROS:- Ion chamber sensor (RD200M) is the same as pro-grade monitor- Accurate within tolerance- Updated readings every 10 minutes- Bluetooth mobile app- Data can be saved to text file (data points saved for every hour)CONS:- Bluetooth range is limited and often you have to select the device again to connect- App is very simplistic. It only tracks data points and does not associate time.- Updates too fast and this confuses people (display only shows average for the last hour)- No batteries so the device cannot be easily moved to a location without powerOther thoughts...A wifi model is being released soon.There are a couple changes that would make this radon monitor stand out from the rest.- Adding support for API or IFTTT- Adding date/time tracking to the app, along with notes/bookmarks that can be set at specific times.Anyways, give it a shot. I think you'll be pleased.

Very accurate. I was skeptical, when I first started using it, it was reporting really high levels of radon. Reading other reviews, I questioned whether it was giving accurate readings. We had a radon mitigation system installed and now our radon levels are safe. Being able to set a radon alert on this unit is great. If our system ever quits working, we will be alerted.

I previously had the Airthings Corenthium detector. I was never sure whether it was working. It registered a radon level in my house, but never seemed to respond to events like opening windows or changing locations. It had an incredibly slow response. It also was very fragile. I leaned against the wall on my mantle, and it tipped over on its face, and the screen shattered. In contrast, the Radon Eye seems to be built like a tank and has a very quick response to changes like opening windows or moving locations. The app is handy for seeing long-term trends, but as others note, it displays in hours rather than days. It also requires AC power, so it is not as mobile as battery-powered detectors. If this detector failed, I would buy it again.