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Spectrometry Corentium Radon Gas Detector (223) Battery Operated

Model #: 223
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Category Radon Gas Testing

The Corentium Digital Radon Gas Monitor measures the average value of the radon gas levels for 1 day, for 7 days, and accumulative for the last year. Since it is battery powered, the monitor can easily be moved around the building, in order to get the full overview of the radon in the home, the workplace, the school or in the hospital. Compared to traditional technology, Corentium makes it much easier to locate the radon entry in the buildings.

Specifications:

  • Radon Gas Sampling Method: Passive radon diffusion chamber
  • Radon Gas Detection Method: Alpha spectrometry using digital detector technology
  • Precision: (at 2.7pCi/L)
    • Short term: (7 days): 80+% after 1 week
    • Long term: 90+% after 1 month
  • Accuracy: Less than 5% deviation (plus or minus 0.14 pCi/L)
  • Power Supply: 3 AAA alkaline batteries (included)
  • Power Consumption: Less than 250mW (average 3 years battery life)
  • Dimensions: 4.75 x 2.75 x 0.9 inches (120x69x22.5 mm)
  • Weight: approximately 4.7 ounces (130grams) with batteries installed
  • Operating Environment
    • Temperature: 32 to 104 degrees Fahrenheit (0 to 40 degrees Celsius)
    • Relative Humidity: less than 95% non-condensing
    • Measurement range: 0 pCi/L (lower detection limit) to 9999 pCi/L (upper display limit)
  • 1 year manufacturers warranty
Certifications

Radon monitors should preferably undergo international comparative tests, in order to compare against other technologies and producers. Since there are so few similar digital monitors in the marked, the Corentium monitor has so far only been able to be tested against traditional alpha track detectors.

The Corentium monitor (named ‘Canary’ in the European market) was in July 2011 tested at the National Institute of Radiological Sciences (NIRS) in Japan. NIRS has calibrated laboratories, and are certified to conduct such tests. The methodology used is that we send a number of monitors to the laboratory; they conduct a test at (for us) an unknown radon level (blind test), and return the monitors to us. We then report our results to them, before they present the correct values, i.e. their measured results. For alpha track detectors, typically 70% of the participants have a result within +-20% of the reference value. This implies that measuring with an alpha track detector in a room with exactly 2.7 pCi/L (100 Bq/m3) over a two months period, the measurements done in that room with an alpha track detector from a random supplier will show values from 1.62 pCi/L (60 Bq/m3) up to 3.78 pCi/L (140 Bq/m3) with 95% probability. In the test at NIRS, Canary had a deviation of 3% of the NIRS reference value. Since the reference value has an uncertainty of 6%, the Canary is thus well within the NIRS laboratory measurement uncertainty.

This means that for a 2 month measurement period at 2.7 pCi/L (100 Bq/m3) - as discussed above regarding the alpha track detector - one can expect that a random Corentium monitor shows between 2.43 pCi/L (90 Bq/m3) and 2.97 pCi/L (110 Bq/m3).

In September 2012 Canary was tested in the Federal Office for Radiation Protection (Bfs) in Germany. 21 monitors were tested against reference monitors, and all were statistically measured to be within the laboratories own measurement uncertainty – which is 7%.

In June 2013 the Corentium was again tested at BfS. 6 monitors were exposed for 1100 h*kBq/m3 and showed an average of 3.6% below the BfS reference value.

Corentium was in 2013 tested at IRSN (Institut de Radioprotection et de Surete Nucleaire) in France. The test was conducted over 3 months at a radon level of 4.59 pCi/L (170 Bq/m3). The average for the 20 tested devices was 4.51 pCi/L (167 Bq/m3).

Corentium has also been tested in calibrated radon laboratories in the Czech Republic. These tests verify that Corentium shows the same radon values irrespective of any changes in temperature, humidity, aerosols (dust particles in the air) and electromagnetic fields. This is in contrast to many monitors that are sensitive, and will typically show wrong results when these parameters change.

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Category Radon Gas Testing
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