Dosimeter
device that measures exposure to ionizing radiation
A dosimeter is a tool that can measure different levels of hazardous environments. Common dosimeters are those used for sound (They measure how loud a certain noise is) and radiation (they measure how much radiation there is in an environment).
There are many uses for dosimeters. For example, workers in nuclear power plants use them to track their radiation exposure. Doctors, especially ones using X-rays, use them too.
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