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When complete, the titrated solution is clear. The automated system determines the end point of the titration using a photo cell in the black housing at the right of the image. The light source is on the left, and the flask is immersed in water to allow the most efficient light passage through the system. At this point the dissolved oxygen value can be calculated. Aboard the USCGC Healy in the Canada Basin. 74.95°, -150.23°.

Credit to Read: 
Photo by Bill Schmoker (PolarTREC 2015), Courtesy of ARCUS
Photographer: Bill Schmoker
Download: 
Image icon Download Schmoker_L1100416.jpg (6.72 MB)
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Focal Length: 
9.12mm
File Size: 
7049163
Computed Mime: 
image/jpeg
Max Aperture: 
f/2.8
Height: 
5472
Width: 
3648
Make: 
LEICA
Model: 
V-LUX (Typ 114)
Exposure Time: 
1/60s
ISO: 
500

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