Automatic radon counter and aerosol

Our sampling device, the automatic radon counter and aerosol sampler (AR-CAS), was used to collect the continuous set of aerosol samples. This instrument also counted the radon daughter-product decay and printed a nearly real-time record for each sample (see Reference 6 for photographs and details of operation). The ARCAS I system consists of a deck-mounted sampling unit and an indoor electronic unit containing sampler controls, calendar clock with display, thumbwheels for manual data entry, and a thermal printer. 

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