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A mechanical, chemical, or electronic device or system to detect, measure, and react to the presence of environmental factors that could affect health. Biological sensors include the 19th century canary in the mine shaft; sniffer dogs to detect alive or dead people in earthquake ruins; drugs or explosives; and microbiological and ultraviolet radiation sensors for blood stains, semen, feces, etc.

Subjects: Chemistry — Public Health and Epidemiology.

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