Radon measurement systems
Instruments for professional measurements of radon and thoron gas levels in homes and workplaces etc, also for measurement of radon concentrations in water and soil.
RAD7 Radon measurement system
The RAD7 continually measures radon and thoron concentration, showing both on a spectrum printout, and also functions as a sniffer with audible count signal to locate radon entry points. The unit features the fastest response and recovery time of any system on the market, and is able to measure radon concentrations at the 200 Bq/m3 action level (UK and EU new buildings) in less than 1 hour with 10% standard deviation. The virtual absence of intrinsic background (0.2 Bq/m3) gives the RAD7 an extremely low detection threshold, easily measuring below 4 Bq/m3. The instrument is microcomputer controlled, featuring step-by-step instructions for ease of use. Data can be displayed on the unit's LCD, printed on external printer (supplied) or downloaded to a PC for further analysis. The unit is a complete, portable stand-alone system with a built-in air pump, supplied in a rugged carrying case, total weight 5 kg. Additional accessories allow measurement of radon in soil and water (continuous and sample measurement); the RAD AQUA continuous water measurement accessory allows measurement of radon in water to extremely low concentrations.
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E-PERM Radon measurement system
The E-PERM system employs re-usable passive integrating ionization chambers, known as electret ion chambers, which are placed in the measurement location for a specific period of time and then read out with a user-friendly electret voltage reader. Electret ion chambers are low cost devices and are supplied in order quantities of 10, thus several measurement locations can be surveyed simultaneously. Short term chambers (measurement period from several days to several weeks, sensitivity 300 Bq/m3-days with short-term electret) and long term chambers (measurement period several weeks to several months, sensitivity 75 Bq/m3-days with long-term electret) are available. As passive devices with no moving parts or electronic components, electret ion chambers are suitable for use in a wide range of locations and conditions. Radon concentrations are calculated from the electret voltage reduction using a handheld computer or PC. Accessories for measurement of radon in water are also available.
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