Cleaning of water monitoring sensor - Forest Water Monitoring Station, Southwest Mau Forest.
"This sensor sends out a UV beam, the UV light is absorbed by the nitrate and the sensor then calculates from this absorption how much nitrate is in the water." – Suzanne Jacobs (CIFOR Intern and Postdoctoral Scientist, Justus Liebig Universitat, Giessen).
Photo by Patrick Sheperd/CIFOR
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