In vivid detail

Meet Corentium Plus, the radon detector that brings data to life. Using the Corentium Plus, you’ll know exactly when levels are high.

Corentium Plus

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Built with multiple state-of-the-art sensors, the Corentium Plus will record everything you’ll need to view fluctuations in radon concentration by the hour. The device comes with user-friendly and Excel compatible software, allowing you to upload data to your PC.

Quick Specs

  • LCD screen shows 1-day and 7-day averages, updated hourly, and long term averages over the period of up to one year
  • Equipped with sensors for temperature, humidity, atmospheric pressure, and tilt
  • Ability to turn the display off during measurement
  • Stores up to 10 years of data at 1-hour resolution
  • Upload to PC with a micro-USB cable (included)
  • Includes user-friendly and Excel-compatible software for analysis and reporting
  • Work/time exposure calculation shows what parts of the day levels are high
  • 2 year battery life

Radon Sampling Method

Passive radon diffusion chamber

Radon Detection Method

Alpha spectrometry using digital detector technology.

Power Supply

3 AAA alkaline battery
24 month battery life-time

Power Consumption

< 250µW


120mm × 69mm × 22.5mm


140 grams (incl. batteries)

Operation Environment
Relative Humidity

4 °C to + 40 °C
5 – 95 %RH (non-condensing)

Measurement range

0 Bq/m³ (lower detection limit)
9999 Bq/m³  (upper display limit)

Precision (at 100Bq/m³)
Short term (7 days)
Long term

20% after 1 week
10% after 1 month


< 5% ± 5 Bq/m³

Internal memory storage capacity 10 years at 1h time resolution
Temperature sensor
4 °C to +40 °C
0.336 °C
± 0.5 °C (typical)
±1 °C (max)
Humidity sensor
5 %RH to 95 %RH
0.5 %RH
± 4.5 % (in range 20-80 %RH)
Barometric pressure sensor
50.0 kPa to 115.0 kPa
0.06 kPa
± 1 kPa

Corentium Plus samples indoor air through a passive diffusion chamber, using alpha spectrometry to precisely calculate the radon level. Radon is detected using silicon photodiodes to both count and measure the energy of alpha particles resulting from the decay chain of radon gas. The instrument is calibrated to reference instruments in accredited laboratories.

The Corentium Report and Analyze (CRA) software, which comes with the Corentium Plus, allows the user to download all the data from the monitor and each sensor to a PC. The software functionalities are extensive, including the ability to generate custom graphics, custom professional reports, and convert all the data into a CSV file.

Question: How often does the device need to be calibrated and how much does it cost to calibrate?

Answer: There is no need to calibrate the Corentium Plus over its lifetime. The device comes pre-calibrated and adapts automatically to its new environment to provide accurate readings.

Question: How quickly can the Corentium device calculate accurate results? A home inspection lasts only a few hours, will it have to be left overnight?

Answer: To integrate daily variation of radon concentration, a short-term test should last a minimum 48 hours. However, we recommend measuring for at least 5 to 7 days if it’s possible, and preferably a few months. The longer you measure, the better the accuracy.

Question: What is the estimated lifetime of the instrument?

Answer: The estimated lifetime is 10 years. The AAA batteries are estimated to last approximately two years.