Our LISST-Black instrument is a self-contained Oil-Spill Response instrument for measuring particle size distribution and concentration, along with the fluorescence of refined fuels, crude oil and chlorophyll. It consists of our LISST-200X integrated with three Turner Designs fluorometers commonly used for Oil Spill studies.

Our LISST-HAB instrument is a self-contained HAB instrument for measuring particle size distribution and concentration, along with the fluorescence of Phycocyanin (Freshwater HAB’s), Phycoerythrin (Marine HAB’s), and Chlorophyll. It consists of our LISST-200X integrated with three Turner Designs fluorometers commonly used for HAB studies.

The LISST-Glider is a Sequoia OEM product. It is sold directly by the glider manufacturers (Teledyne or Kongsberg) for integration onto their gliders by their technicians. Sequoia does not sell the LISST-Glider directly to any customers or end-users. However, we can advise on the application and put you in contact with the appropriate personnel at Teledyne or Kongsberg.

LISST-200X Sediment Sensor - our workhorse and most popular and versatile instrument. Measures particle size distribution, particle concentration, beam attenuation, temperature and depth down to 600 m. Can provide real-time output of mean size and total concentration in analog format (e.g. for CTD integration). Can alternatively provide real-time output of full size distribution over RS-232. Completely self-contained with external battery packs (included). Can power and log signals from up to three analog sensors. Wide selection of accessories available.

Digital submersible, autonomous stand-alone holographic camera.

LISST-SL2 for river (freshwater) applications ONLY. Not for brackish or estuarine conditions. Rivers only.

If you answer Yes to the above, you will need one of our LISST particle sizers. Our acoustic sensors will not work if you also want size or want to measure deeper than 100 m depth.

The LISST-ABS measures the concentration of particles >~50um with ~+/- 30% accuracy. Fully factory calibrated.

The LISST-AOBS measures the concentration of particles across all size classes within a factor of ~two of the true concentration. Fully factory-calibrated.

The LISST-Deep measures particle size, particle concentration and beam attenuation down to 4,000 m depth.

The LISST-Glider is only sold via Teledyne or Kongsberg. Sequoia does not sell this directly to end-users; Teledyne / Kongsberg must integrate the LISST-Glider onto their respective gliders

You need our LISST-Horizon or our LISST-200X with a flow through chamber.

The LISST-Tau, introduced in 2020 is a high-precision transmissometer. It integrates onto CTD's, floats, gliders, and any other vehicle you can think of. Depth rating 2,000 m

The Hyper-bb is the instrument of choice for this.

In this setup, you can pump water from the R/V flow-thru system through the LISST-Holo2 and get pictures of the particles. Upon processing, the LISST-Holo2 data also shows particle size distribution and concentration, along with statistics of the individual particles.

The LISST-Horizon is a self-contained instrument for bench-top deployment in a research vessel laboratory. Plumbed to continuous underway uncontaminated seawater, it continuously measures particle size distribution, concentration, and inherent optical properties (beam attenuation & VSF).

In this setup, you can pump water from the R/V flow-thru system through the LISST-200X and get continuous measurements of particle size distribution and beam attenuation.

In this setup, you can measure particle size, particle concentration and beam attenuation from a sample suspended, e.g. in a beaker, pumped through the LISST-200X. Alternatively, water from the continuous underway system on an R/V can be pumped through the LISST-200X. You can also take the LISST-200X in the field for in-situ deployments.

The LISST-Portable|XR is designed for laboratory analysis of discrete samples. It can also be used in the field for immediate on-site analysis of discrete samples taken in the field.