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Sequoia Scientific

LISST-Deep Testing!

February 19, 2026

Performing at 4,000 meters!

This week Sequoia’s Khanh Le successfully completed testing of two LISST-Deep instruments at the Ocean Sciences Building testing facility located on the University of Washington campus in Seattle.

The LISST-Deep is a deep-sea version of Sequoia’s workhorse LISST-200X. It is a self-contained submersible laser-diffraction particle size analyzer for ocean depths up to 4000 meters. Like the LISST-200X, it measures the concentration of suspended particles in 36 size bins from 1 to 500 microns.

Follow this link to video…