fluorometer

/flʊˈrɑmɪtər/
noun
  1. An instrument that measures the intensity of fluorescence emitted by a sample, used in chemistry, biology, and environmental science.
    • With a fluorometer, scientists can detect tiny amounts of pollutants in river water.
    • The fluorometer showed a strong signal, indicating the presence of the fluorescent marker.
    • The lab technician used a fluorometer to measure the chlorophyll content in the water sample.