Airthings Corentium Home Radon Detector 223 Portable, Lightweight, Easy-to-Use, (3) AAA Battery Operated, USA Version, pCi/L

For the price this device is great. The batteries last a long time. Information is given on the unit itself. Readings were compared to a professional unit when we had mitigation installed in a new dwelling and this unit was accurate. Screen is starting to fade after almost 10 years. Was looking at the Ecosense RD200 RadonEye, but that one is not battery operated, the on screen display only show current reading, it uses bluetooth with an app. to get more than current reading. People have issues with the app and/or bluetooth connectivity. Seems I will be purchasing another one of these, as it overall seems far superior to the RadonEye. I dont want to have to plug it in, I do not want to install an app. Thank you Air Things, for creating a simple and effective device.

Buen producto , confiable y las mediciones comparadas con otros equipos lo hacen confiable... recomendado totalmente para medición de gas radón en domicilio

I'm really glad to have this device. When we bought our house 15 years earlier, we had done a radon test and found the levels to be low. But within the last few years I'd started using the unfinished basement quite a bit (home gym), and randomly ordered a charcoal radon test off Amazon. It took me a few months before I finally used it, but after getting the results back, I found that our radon levels were above safe limits (~10+ pCi/L). That freaked me out, and I wanted to quick answers, so I bought this Airthings radon detector from Amazon and had it the next day. It confirmed that our levels were higher than they should be. Further, it also revealed our levels were above safe limits even on the floor above the basement. I'm so glad we didn't have to wait for another charcoal test. A few days later, we had a radon system installed that basically sucks the radon out of the ground, underneath the crawlspace and concrete basement floor. This was a year ago and it has been very effective, reducing our radon levels down to a 1-year average of ~1.3 pCi/L. I've found the Airthings device to be quite accurate, nearly matching the 2-week results from an independent test using two Sun Nuclear radon testing devices. I like how quickly I can get results. For instance, I recently found that opening windows on the top level of our house causes radon levels to increase in the basement (to ~3-4 pCi/L), and this happens due to a chimney effect creating negative pressure in the house, causing it to draw more radon out of the ground. I also learned that I could prevent the negative pressure by also opening windows on the lower level of the house. If I didn't have the Airthings device, I would not be able to tell how these kinds of changes affect radon levels. For any kind of test like this, it's important to give it some time (a day or two minimum), as radon levels naturally increase and decrease all the time, so you can only trust longer term averages. And the longer the test, the more accurate the number. The Airthings device doesn't give you minute-by-minute readings for this reason. Instead, it gives you, short term 24-hour, 7-day, and long term averages, which is ideal. I also like how simple this device us, it's foolproof. There's really nothing for you to do other than finding a good place to put it, and reading its screen. There are no buttons (unless you count the tiny reset button on the back, which you may never use). It shows you the 1-day, 7-day and long-term averages by rotating the numbers every few seconds on the screen. The batteries last a really long time. We've been running the device on the original batteries nonstop for over a year, with no sign of slowing down. Lastly, I also like that you can easily test different places in your house, or even different houses (we recently tested my parents house). It would be a pain to do this with charcoal tests. I highly recommend this device, especially if a charcoal test makes you want further testing, and it is well worth the price. I can't think of any downsides and I will never be without one of these devices.

The Corentium 223 should be in every home where Radon is a concern! Several years ago, I had a sub-slab depressurization system installed after a charcoal test measured 7 pCi/L. At the time, two follow up charcoal tests came back at 3.4 and 2.3 pCi/L so I felt better but for the past few years, I've still wondered what a longer term test would show. For peace of mind, I purchased the Corentium 223 and I have since learned so much about how Radon levels vary given the weather and how a charcoal test, while accurate, is going to only tell you so much. I've had the Corentium 223 set up in my basement for the past 3 months in mostly closed house conditions and found my long term average to be 1.76 pCi/L, but the daily average was as high as 8.3 pCi/L! The more rain fall in the past 24 hours, the higher the Radon level in the basement. On clear sunny calm days, the levels dropped to around 1 pCi/L. There are a lot of sites that talk about how Radon levels vary depending on the weather, but I've never found any site that details exactly how the levels increase by rainfall. This could be unique to my property, but the correlation has been eye opening. Hoping I could improve the effectiveness of the mitigation system, I decided to seal the crack between the wall and floor next to the suction pipe by adding silicone along that wall to seal the joint. (I've seen several sites suggest this and I could hear a slight hissing with the air leaking so figured I'd give it a try to see if there was any change.) The next day, the 1 day average was just 0.10 pCi/L! The following week, the 7day average dropped to 0.71 pCi/L, even after one day of heavy rain that week!!! Another concern I have had is the amount of Radon in my water. I have a private well and have considered having the water tested, although research I have read on the topic indicate almost all water from private wells will contain Radon, but the danger is really the amount of Radon that you breath in, not consume. While the Corentium 223 only measures the amount of Radon in the air, it will measure the amount of Radon in the house that is given off by water use in the house such as showering and doing laundry. My concern was that I have a whole house humidifier that runs occasionally in the winter months and uses water from the well. While I do see a slight increase in Radon in the house when the humidifier is running, it only seems to be 1 - 1.5 pCi/L increase and it is hard to say if it is really from the humidifier or just natural fluctuations. I have yet to read any warnings on the EPA site or other sites about the hazards of increased Radon exposure when using a whole house humidifier on a private well, but this monitor was able to help put my mind at ease on the issue. If you really want to know the Radon levels in your home, and measure effects of various mitigation strategies, this is the only device I've found on the market that will give you immediate, reliable and accurate data. After 24 hours of powering on, you have your first readings and after 7 days you have your first long term average. It is simple in the design and implementation and the quality of construction is superb. I should also mention that I ordered the Safety Siren Pro Series3 Radon Gas Detector - HS71512 by Family Safety Products, Inc. , but the device I received wouldn't power on. I returned it the next day and purchased the Corentium 223. There is no comparison between the quality of construction between the two devices and with annual calibration requirements of the Safety Siren, the price for the Corentium for 10+ years of use is an easy sell. The device has a micro USB port on the side. My only wish is that there was support for downloading of Radon readings to a computer. Being able to download historical readings would allow for graphing and comparison to local weather reports. If it did this, I'd give it 10 stars! I would highly recommend the Corentium 223 if you have had 2 charcoal tests with results >4.0 pCi/L. In my mind, the Corentium 223 is the absolute best digital Radon monitoring device on the market today!

Convenient to have a meter, but for reliable results, use test. Meter didn't start to operate initially (couple of hours), so requested a replacement. Then the original began displaying readings, so I set both up side-by-side in a basement closet. The readings were not close, over 20% apart. But at least it provides an indication of ups and downs and shows when ventilation or resolution is needed.