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Sequoia Scientific

Marine

Sequoia Scientific has been building instruments for making measurements in the marine environment since 1995. The LISST-200X and its predecessors (the LISST-100 and LISST-100X) has become the go to tool for measuring particle size and concentration in the ocean. The LISST-Holo is a holographic particle imaging system that can produce images of particles as well as obtain size distributions. The LISST-VSF and LISST-Stokes are specialized instrument made specifically for the ocean optics community. The FlowControl is our newest product and is used with other optical instruments such as WetLabs AC-S to provide the ability to automatically switch between filtered and unfiltered source water and thus greatly improve the accuracy of data.  HydroLight is widely used software for computing underwater radiance distributions and related quantities as needed for optical oceanography and ocean-color remote sensing.  EcoLight-S is a subroutine package for computing underwater irradiances for use within ecosystem and iterative inverse models, where extremely fast run times are required.


LISST-200X

This model supersedes the LISST-100X. The LISST-200X marks a major advance in technology of our workhorse LISST-100X submersible laser-diffraction...

LISST-ABS

This is a low-cost sensor designed specifically for measuring Suspended Sediment Concentration at a point. It represents an advance over turbidity...

LISST-Glider

The LISST-Glider is a version of the LISST-200X designed for glider integration. The LISST-Glider has the same specifications and performance...

LISST-Horizon

The LISST-Horizon is a self-contained instrument for bench-top deployment in a research vessel laboratory. Plumbed to continuous underway uncontaminated...

LISST-Portable|XR with ultrasonic probe inserted

LISST-Portable|XR

The LISST-Portable|XR is the world’s first and only battery powered, portable, low-cost particle size analyzer. It can be used in the field,...

LISST-Holo Digital Holographic Imaging System

LISST-Holo2

The LISST-Holo2, introduced in 2017, stores holograms for study of flocs, plankton, and other particles in water. It is an advanced successor...

LISST-Deep promo photo

LISST-Deep

The LISST-Deep instrument obtains in-situ measurements of particle size distribution, optical transmission, and the optical volume scattering...

LISST-VSF Detail

LISST-VSF

World’s first autonomous, submersible instrument for measuring the volume scattering function (VSF) of water with depolarization. Measures...

LISST-STOKES

The LISST-STOKES from Sequoia is the world’s first commercially available submersible instrument for measuring the depolarization ratio in...

FlowControl-Lab

FlowControl-Lab

FlowControl-Lab is a computer-controlled 3-way valve system for use in flow-through applications on board research vessels or for dock-side sampling. The...

FlowControl-Sub

FlowControl-Sub

FlowControl-Sub is a microprocessor-controlled fully submersible 3-way valve system for use in flow-through applications on profiling platforms...

EcoLight-S

EcoLight-S(ubroutine) is an extremely fast RTE (radiative transfer equation) solver developed for use as the optical component of coupled physical-biological-optical...

HydroLight

The HydroLight radiative transfer numerical model computes radiance distributions and related quantities (irradiances, reflectances, diffuse...