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

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!

This is an excellent instrument which I selected after extensive review especially that it is used by the pros. Most importantly, it provides measurements every 10-minutes so that I can pinpoint the radon hot spots in our basement and ensure the main house is safe. The app is easy to use and doesn’t require Wi-Fi or an on-line account. It loads measurements via Bluetooth and the range is very good enabling me to get measurements from the unit positioned in the basement from the comfort of the main house level.I have had a radon detector for several years which I have used to great effect to measure radon in our houses and family houses after purchase. Last year I had it recalibrated and used it to check the accuracy of the new unit. The big disadvantage of my old radon instrument was the 2-day initial sample acquisition and daily updates making hot spot radon checks ineffective as radon varies.Very happy with this unit which is going to save me a lot of wasted effort figuring out where and how I need to mitigate the radon levels in the basement.

This device works great. Allowed me to learn in a day how well my mitigation system works, if the way I seal my sump pump is sufficient, get readings at multiple locations in my house and find out how bad the radon is if my mitigation system is not working. This would have taken weeks to do with lab test kits.

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.

Works right out of the package.The app is easy to navigate.I just wish it had additional features besides the radon sensor, like temperature, CO2, humidity, etc. Just a thought.