RadonEye RD200 vs EcoQube: differences that matter

Under the case, the two are close to identical. Ecosense lists the same sensor, the same sensitivity, the same measurement range and the same accuracy claim for both. Each takes a measurement every 10 minutes and reports a 60-minute moving average, so a first reading appears about 10 minutes after you plug it in rather than after a day. Both are rated for rooms of up to 1,000 square feet, and both are meant to run from the wall rather than from batteries.

The RadonEye RD200 has a built-in OLED screen that shows the last measurement and scrolls through its averages, so you can read it by walking past. Its phone app connects over Bluetooth, which means you check the history when you are near the device, and Ecosense says you can track short-term and long-term trends there.

The EcoQube has no screen. A three-color light on the front shows the hourly level at a glance, and the detail lives in the app: short-term and long-term averages and the hourly data points. It needs a 2.4 GHz Wi-Fi network, and in return you can see your results from anywhere, swipe through weekly, monthly and yearly trend charts, and link it to other smart-home services through IFTTT. In the United States, its app can also run a 72-hour test analysis and email you when the analysis is complete.

Both monitors run from a plug-in adapter: 12 V for the RadonEye RD200 and 5 V for the EcoQube, and Ecosense sells a replacement for each. Both are listed as plug-in models, so each needs a socket in the room you want to measure. For the RadonEye RD200, Ecosense says the screen's real-time data and daily and weekly averages reset when it loses power and cannot be measured without it, while the stored data stays on the device unless you reset it through the app. It says the RadonEye RD200 saves data for up to a year and is expected to have a service life of 5 years.

The RadonEye RD200 has a built-in audio alarm. The EcoQube shows the hourly level on its light and the detail in its app. Both come with a 12-month limited warranty, and Ecosense adds a one-year extension to each when you register the device within 30 days.

Moving average

An average over the most recent stretch of readings that updates as each new reading arrives. Both monitors show a 60-minute moving average, so the figure on the screen or app reflects the last hour, not your year-round level.

Both models were approved in C-NRPP's 2024/25 consumer monitor evaluation. C-NRPP's list describes the RadonEye RD200 as taking measurements every 10 minutes and displaying an hourly rolling average, and the EcoQube as showing hourly levels on its light, with short-term and long-term averages and hourly data points in the app.

Both also took part in a 2024 field study that ran consumer monitors beside a calibrated reference instrument at a natural radiation laboratory in Salamanca, Spain, between 1 July and 23 August 2023. Over that period the RadonEye's average differed from the reference by -15.8%, and the EcoQube's by 5.4%. The study also counted the share of records each monitor lost: 2.2% for the RadonEye and 18.9% for the EcoQube.

Neither comes out ahead. Each list below has four points, drawn from the features each maker states, so the choice rests on how you will use it.

Both models, with their full specifications and evidence, are on their own pages: Ecosense RadonEye RD200 and Ecosense EcoQube. Ecosense also makes a battery model with an E-Ink screen, covered on the Ecosense EcoQube Flex page. Every monitor we cover is on radon detectors and monitors.

1. 1Step 1 of 5:

   Pick the floor

   The lowest lived-in level of the home, in a room used regularly, such as a living room, playroom, den or bedroom, not a kitchen or bathroom.

2. 2Step 2 of 5:

   Pick a room people use

   A room occupied for at least 4 hours each day.

3. 3Step 3 of 5:

   Set the height

   At least 20 inches above the floor and away from drafts, high heat, high humidity and exterior walls.

4. 4Step 4 of 5:

   Mind the router (RadonEye)

   Ecosense asks for at least 24 inches between the RadonEye and any Wi-Fi router or hotspot, and to keep it away from open windows and vents.

5. 5Step 5 of 5:

   Give it time

   Test for at least 3 months, preferably in the heating season, and decide on the long-term average.

More on placement is at where to place a radon test, and on reading the result at continuous radon monitors.