The voyage of the challenger was truly an interdisciplinary voyage. there were chemists, biologists, and physicists on board. they used many different types of instruments and tools. which type of tool was used to collect ocean water for analysis?

The Buchanan Water Sampler was used to collect ocean water for analysis. James Buchanan created the sampler and to use it the user threw the line attached to the device in the ocean. When the line reached a certain depth the user closed the sampler with a tiny mechanism and pulled it up.