Sequoia’s LISST-200X enjoys popularity amongst microplastics researchers. The instrument has been used to analyze microplastic particle distributions from disposable masks[i] , investigate interactions between oil droplets and microplastics[ii],[iii],[iv] and measure microparticles from biodegradable...
Sequoia’s LISST-Portable|XR is widely used to analyze suspended sediment concentration (SSC) and particle size distribution (PSD) in various aquatic environments. It has been employed in laboratory and field studies, sedimentology, geomorphology, water quality studies, and hydropower and oil &...
Sequoia’s LISST-Portable|XR laser diffraction particle size analyzer has significantly advanced research in hydropower and sediment management by providing precise measurements of suspended sediment concentration (SSC) and particle size distribution (PSD) in various environments. It has been instrumental...
The articles discuss the use of Sequoia’s LISST-VSF instrument, a submersible multi-angle polarized light scattering meter measuring the volume scattering function (VSF) in situ. Commercially available since 2012, the LISST-VSF’s capabilities have been demonstrated in extreme environments, such as...
Sequoia’s Laser In Situ Scattering and Transmissometry (LISST) particle size analyzers have significantly advanced the understanding of flocculation in aquatic environments. Since the mid-1990s, LISSTs have often replaced or supplemented older technologies with in-situ and real-time measurements of...
In 2019 Sequoia published a short note on our website regarding the feasibility of measuring plastic particles in situ. Two main conclusions were drawn: If one considers the number concentration of plastic particles (α), and the sampling volume (SV) of any instrument used for measuring plastic particles,...
The University of Hawai’i at Manoa (UH) operates the Hyper-bb hyperspectral backscatter instrument. Professor Angelicque White uses the instrument as a component of the open ocean Hawai’i Ocean Time-series (HOT) program to collect key datasets related to calibration and validation of scattering...
Kelly Thomas, Biological Oceanographer A longtime user of LISST instruments, the University of Alaska Fairbanks has been using the new, LISST-200X-style 4,000m rated LISST-Deep from Sequoia Scientific, Inc. The LISST-Deep instrument measures in-situ particle size distribution from 1 um to 500 um, optical...
Sequoia Scientific LISST Instruments in Benguela Upwelling System In May of 2022 the French research vessel Tara sailed northward along the Western coast of Africa as part of the multi-year Microbiomes mission. Several instruments from Sequoia Scientific were installed on Tara during transit between...
Bubbles in water are studied intensively. For modeling and measurement purposes it is sometimes assumed that bubbles are spherical, but this is only true up to a certain size: When the hydrostatic pressure difference from top to bottom of the bubble is larger than the internal pressure inside the bubble...