Iodine 131 (a by-product of reactor fission) can form a vapor that can be transported great distances in the air. Iodine monitoring systems use NaI(TI) scintillation detectors with a built-in Am-241 source for compensation of temperature changes and drifting. In fixed and mobile configurations, these systems detect gamma activity of radioactive iodine samples in both molecular and organic forms.
Continuously measuring the gamma volumetric activity of radioactive iodine sample contained in air drawn from stacks, ventilation ducts or working areas.
Compact, lightweight and movable, this monitor measures the gamma volumetric activity of radioactive iodine sampler.