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RM-2 radon detector

rm2 radon detector


Radon measurement


Dr. Quentin Crowley


Trinity Centre for the Environment Laboratory


  • The RM-2 Radon detector is designed for in situ rapid and accurate analysis of radon (222Rn) in soil gas and therefore is applicable to radon risk mapping and assessment of radon content in soils.
  • It can be used as well for various applications such as uranium exploration, assessment of radon at uranium mines and uranium tailings, geochemical mapping and identification of lithological boundaries, locating of faults and fracture zones, radon measurement at oil-fields, and predictions of earthquake and volcanic eruptions.


Gas samples

Additional information:

The RM-2 consists of a set of fifteen ionization chambers IK-250, the reader ERM-3 and a soil-gas sampling set. Samples of soil-gas are collected through hollow steel rods by means of a plastic large-volume syringe and transferred to evacuated ionization chambers. In order to eliminate thoron, ionization chambers with soil-gas samples are measured with specific time delay of 15 minutes after sampling. Alpha radiation of radon in soil-gas sample give rise to ionization current in the ionization chamber, which is measured within 120 s. The pre-programmed, fully automatic reader ERM-3, with installed calibration constant, displays the concentration of radon in units of volume activity (kBq/m3). Estimates of thoron are possible.


Training required before use.

Rm2 radon detector