pl23_ship4013.jpg
![Figure 12 ship4013.jpg Figure 12](https://s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_ship4013.jpg)
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https://www.noaa.gov/media/digital-library-photo/pl23ship4013jpgDescription
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 SARSin the North Atlantic. It was first used near the Azores at depths of 500 to700 meters.
Credit
Oceanographic Museum of Monaco
Photographer
P. Roggero
Collection
Voyage to Inner Space
History of Oceanography Collection
The Early Instruments - Collections of the Oceanographic Museum at Monaco
Photometers
Keywords
Oceanography
Historical instruments