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Environmental monitors designed to continuously detect, measure, and display data on alpha, beta, gamma, and/or x-ray radiation, usually expressed in sievert or roentgen per hour. These monitors typically consist of a radiation detector capable of assessing radiation levels ranging from normal background to catastrophic and an electronic unit including a display. Most monitors include alarms; some include recording and/or telemetric capabilities. Ionizing radiation environmental monitors are used in nuclear medicine areas, radiotherapy rooms, or where radiation is used or present.
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