Frequently Asked Questions


[RadoEye Pro]

Q. What is the minimum and maximum duration of measurement?

A: The minimum measurement duration can be as short as 2 hours and maximum measurement duration can be up to 240 hours.  However, EPA recommendation is 48 hours for a standard home inspection.

Q. Since the accuracy of the radon values are similar to other devices after 48 hours, what is the advantage of real time detection?

A: RadonEye Pro's real time sensor technology provides a moving average value every hour (updated every 10 minutes) which enables home owners to mitigate radon concentration immediately by opening windows and/or turning on their ventilators.  In the cases of home inspection; if there is a wide variation of readings, it could mean someone altered the environment by opening the door or windows, in which case, they can re-start the inspection remotely.

Q. Is it possible to know if and when the device was tempered  or moved?

A: Yes, due to our high sensitivity delivering real time detection, you can set an alarm notification to detect any sudden changes. (powered disruption, moved, etc.)  You can also view the inspection results to see when the disruption occurred. 

Q. How do you check the radon concentration value real time?

A: If you have Wi-Fi connection during inspection, the data is automatically saved to the server every 10 minutes.  To that end, you can check the real time measurement through your Web and through your downloaded mobile App.

Q. In cases where there is no Wi-Fi available, how does the data get uploaded to the server?

A: There are 2 options:  You can access through a separate AP device (not provided) or you can upload the data through your connected mobile device via BLE when the inspection is complete.  (in the latter case, you will not have access to real time data outside of BLE range)

Q. Can multiple users be allowed to register to a single device?

A: Yes, the registered administrator (1st user) can add multiple new inspectors through the Web and also transfer the administrative functions by going to "Transfer Authority" page. 

Q. What can I do differently from the Web compare to the mobile App?

A: Most of the functions are the same in the Web ( as are in the mobile App; except there are more detailed functions in device and client management which allows for more proactive management.

Q. Is your device certified by NRPP or NRSB?

A: Yes, this device is NRPP listed for professional home inspectors and can be found at the website below. #CR-8306 / FTLab RadonEye RD200P

Q. What happens if there is a power outage during an inspection?

A: In the case of a power outage the device will continue to log the 48 hours of data once the power is back on.  (e.g. if power was out for 2 hours, the device will pick up where it left off when the power is back on.  Run time total is 50 hours from the start of inspection with 48 hours of data)  For areas with frequent power supply issues, we recommend using a secondary battery as an option (20Ah can last up to 72 hours).  Your device comes with the needed accessories like step up cable and battery pouch.

Q. What is included in the purchased package?

A: Our RD200P comes with a carrier bag, tripod holder, 12V adapter, extension cable, step-up cable, battery pouch, quick manual, and calibration certificate.  (battery and tripod are not included)

*With 20Ah battery it can last up to 72 hours, power consumption of RadonEye Pro is12V 0.1A. Any portable batteries supporting 12V output should work.

Q. What is the maximum measurement value of RD200P?

A: Maximum measurement value = 255pCi/L (or 9,435 Bq/m3).  For any value beyond this reading, the display will show "OVER" on it.

Q. How often and where can I get the devices calibrated?

A: RadonEye Pro comes with calibration certification. Calibration is required every 12 months (for professional products) by law from the date of the original calibration date. 

We have an agreement with Bowser-Morner in the US for this service. Bowser-Morner, Inc. (Radon Reference Laboratory) 

Calibration cost $125 - $160 plus shipping. It depends on the quantities of product. Please contact Bowser-Morner for more information. / 937-236-8805 ext. 259

We have an agreement with RSIC (Radiation Safety Institute of Canada) in the CANADA for this service.

Q. Can I customize the report?

A: After finishing the inspection, the report can be generated. We offer options for report that customized data name, client name, add notes, upload your company logo and upload site photos or drawings. You can create a report from the RadonEye Pro mobile app or web dashboard ( Also you can share or send reports by email or message.

Q. What is the life cycle of this device?

A: RD200P can last as long as you take good care of it.  However, we recommend upgrading after ~5 years


[RadonEye & General]

Q. What is radon?

A: Radon is a radioactive inert gas that is a colorless, tasteless, odorless and heavier than air.  Natural elements such as soil, rock, and uranium (or thorium) contained in building materials (concrete, gypsum board, asbestos slates, etc.) decay continuously to form radon.  Exposure to high concentration radon is known to cause lung and stomach cancer.

Q. Is there a standard method to measure indoor radon concentration?

A: EPA (Environmental Protection Agency) has set the following standards for measuring radon for an indoor area.   To minimize the movement of air, all doors and windows must be closed; and the radon monitor needs to be 90Cm from the windows and 50Cm above the floor for 24 to 48 hours to obtain an avarage concentration measurement.  

Q. Does radon value fluctuate?

A: Radon is the only radioactive element that exists in a gaseous state and fluctuates with change in the environment. (air circulation, temperature, air pressure, etc.)  To that end, low sensitivity devices that can only measure radon concentration over 24~48 hours will not be able to detect real time fluctuation of radon.  Further, without ventilation, low level radon can aggregate to dangerous levels over time so it is important to monitor it continuously to take immediate corrective action.  

Q. Is it possible to get a varying radon measurement from different devices even if the measurement was done at the same time and location?

A: Yes, the measurement readings from multiple devices can vary as the radiation release (decay volume) is not consistent even while it is located in the same room.  To that end, each device has a recommended measurement time (based on sensitivity) to achieve high accuracy.  Our radon eye series has variability of ±0.5 pCi/L  for 1 hour of measurement which is best in our class. (If 1 hour reading is 2.0 pCi/L, the radon value is within the range of 1.5 to 2.5 pCi/L)  

Q. What is the harmful level of radon concentration?

A: U.S. EPA recommends radon reduction re-mediation at a level of 2 pCi/L  or higher (high risk level = 4 pCi/L)

Q. Is there correlation between weather conditions and radon concentration?

A: In general, radon levels tend to be higher in winters than summers and in morning hours than during mid days.  Radon is also known to rise on rainy days or when there is high levels of fine dust.

Q. What is the warranty duration for RD200P, RD200?

A: 1 year from time of purchase

Q. Who do I contact for additional support?

A: Ecosense, Inc.
Customer support: