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Comparison of 250 mSv count rate thresholds for the four survey meters for each of five radionuclide exposure scenarios: (A)241 Am inhalation (1-µm AMAD / Type M), (B)60Co inhalation (1-µm AMAD / Type M), (C)137Cs inhalation (1-µm AMAD / Type F), (D)131I inhalation (1-µm AMAD / Type M), and (E)192Ir inhalation (1-µm AMAD / Type M). As plots correspond to the reference adult male screened in the AP chest position at 30 cm distance
