Precision Measurement Engineering, Inc. (PME)

Measuring Sediment Temperature


Researchers from the University of Hawaii and PME developed a miniature thermistor chain to measure temperatures in surficial sandy sediments. The miniTchain was deployed for several months in 2010 and 2011 on the Kilo Nalu Cabled Observatory, which is located 200 meters off the coast of Honolulu, Hawaii. The miniTchain has thermistors mounted within a rigid frame and has several features to minimize thermal contamination from heat generated by or transported by the instrument. It has two vertical columns of thermistors so that it can measure under a sand ripple crest and trough simultaneously. Within each column, thermistors are spaced 1.5-2 cm apart. The miniTchain is being used to study how sand ripple dynamics affect rates of biogeochemical activity in surficial sediments.

Information provided by Jonathan Peter Fram, Associate Systems Engineer with the Ocean Observatories Initiative.

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