A portable radon detection system (alpha-Inin) has been designed and constr
ucted for using it in adverse environmental conditions where humidity, temp
erature and chemical vaporous are present. The minimum integration time is
in periods of 15 rain during 41 days. A 12 V battery and a photovoltaic mod
ule allow the alpha-Inin autonomy in field measurements. Data is collected
by means of a laptop computer where data processing and alpha-Inin programm
ing are carried out, alpha-Inin performance was simultaneously tested in a
controlled radon chamber, together with a commercial alpha-Meter. (C) 1999
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