In geochemical prospecting using stream sediments and soils, radium is more direct than uranium.

  • At the Faraday Mine, radium in the A-horizon and B-horizon and uranium in the B-horizon all respond well to the presence of underlying ore. As expected, anomalies in all three cases are shifted somewhat downhill. Uranium in the A-horizon, on the other hand, shows no relationship to the underlying ore, but gives a strong anomaly in the swampy soil lower down the hill.
  • Also in the Bancroft area, in organic stream sediments, we find that upstream uranium mineralization is more closely reflected by radium than by uranium.
  • Radium is determined in soils, sediments and water using the same Lucas cell system as for radon.

  • We measure: radon - radium - thoron - radon daughters - alpha radiation.
  • The Lucas cell is recognized as the most sensitive and reliable method for these elements.
  • Intrinsically safe functions.
  • Sensitive to geochemical trace levels necessary for radon in lake water and for radon-thoron isotope ratios.
  • immune to beta and gamma radiation.
  • one monitor works with a number of (less expensive) detectors.
  • Our instruments are used around the world in exploration for uranium, oil & gas, groundwater and hydrothermal, and in environmental protection, health physics, earthquake prediction, and evaluation of hydrocarbon and NAPL contamination etc.
  • Same instruments used for radon and radium in soil, sediment, plant parts, rocks, water, soil gas, air, snow, food, and for radon and thoron daughters in air.
  • Winter and summer, from the Sahara Desert to the Canadian Shield, our instruments have faced up to severe field conditions.
  • In the radon business since 1968, our instruments are updated regularly with the most recent major re-design in 2015. Modern, low-power, field-rugged electronics. Some earlier versions still working after 40 years.
  • Continuous real-time monitoring and data recording.
  • RS232 port/pc software.
  • User programmable measurement intervals, sample and count periods and alarm level settings.
  • Can work in a tent without electricity or be carried from point to point in the field.
  • 50 readings per day. Results available immediately.
  • Portable. Rechargeable battery pack good for a long day in the field and recharges in a few hours.
  • Can be operated by junior personnel if carefully supervised.
  • EPA and CE Mark compliant.
  • Click here ( for more details of our radon instruments, and for other instruments, components and accessories we provide.
  • Technical specification sheets and pictures of our instruments provided on request.
  • Multilingual consulting and training (if required).
For instruments contact

Robert H. Morse, Ph.D., P.Eng.
February, 2010
Click here for technical details and other applications of our radon instruments.

Copyright 1968 - 2018, R.H. Morse & Associates Ltd., all rights reserved.