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NOAA Photo Library Image - ship4013

Figure 12. E. B. Helland-Hansen's photometer. Left: device before opening. Middle: Device during exposure. Right: Device after closing. Invented by Bjorn Helland-Hansen in 1910, this photometer was used aboard the MICHAEL SARS in the North Atlantic. It was first used near the Azores at depths of 500 to 700 meters.

Image ID: ship4013, Voyage To Inner Space - Exploring the Seas With NOAA Collect
Photographer: P. Roggero
Credit: Oceanographic Museum of Monaco

Category: Oceanography/Historical instruments/

High Resolution Photo Available

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Last Updated:
November 10, 2017