pl23_ship4013.jpg

Figure 12

Image

Download ( 1.58 MB )

Permalink

https://www.noaa.gov/media/digital-library-photo/pl23ship4013jpg

Description

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