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Conductivity Temperature Depth Profiler (CTD)

By Communications and Publishing
Image: Conductivity Temperature Depth Profiler (CTD)
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Detailed Description

These are the lids both on top and below the water bottles on the Conductivity Temperature Depth Profiler (CTD). When the CTD is placed in the ocean and reaches a desired depth, an electronic signal is sent from the ship that closes the bottles and a water sample is collected.

Sources/Usage

Public Domain.