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...
…Wherein we’ll learn about the LISST-Tau and some of the ongoing developments at Sequoia. (Part XIII can be found here https://www.sequoiasci.com/article/the-history-of-sequoia-part-xiii/ ) In the fall of 2019 Sequoia got the opportunity to develop a dedicated transmissometer. While the laser-diffraction...
…Wherein we’ll learn about the LISST-AOBS, Hyper-bb and LISST-Horizon. (Part XII can be found here: https://www.sequoiasci.com/article/the-history-of-sequoia-part-xii/ ) After the LISST-ABS introduction in 2016, Yogi noted that the LISST-ABS and turbidity sensors have opposite-trending changing sensitivities...
…Wherein we’ll learn about the LISST-ABS and the LISST-200X (Part XI can be found here: https://www.sequoiasci.com/article/the-history-of-sequoia-part-xi/) In 2013 Yogi came up with an idea for a point sensor for measuring suspended sediment concentration; the LISST-ABS. It was developed in collaboration...
…Wherein we’ll learn about the LISST-VSF and some arriving and departing employees. (Part X can be found here: https://www.sequoiasci.com/article/the-history-of-sequoia-part-x/ ) The LISST-VSF In 2011, Sequoia finished an SBIR (Small Business Innovation Research grant) and developed a full-angle...
…Wherein we’ll learn about the use of LISSTs during the Deepwater Horizon accident in 2010 (Part IX can be found here: https://www.sequoiasci.com/article/the-history-of-sequoia-part-ix/) Particle size distribution is important in many areas. When the Deepwater Horizon disaster occurred in the Gulf...
…Wherein we’ll learn about the LISST-Holo and what else happened in the late 2000’s! (Part VIII can be found here: https://www.sequoiasci.com/article/the-history-of-sequoia-part-viii/) At the PiE 2008 meeting, one of the presentations was by a young scientist from the UK – George Graham. He showed...
…Wherein we’ll learn about the LISST-Portable, and the first Particles in Europe (PiE) conference. (Part VII can be found here: https://www.sequoiasci.com/article/the-history-of-sequoia-part-vii/) Way back in the early 2000’s Chuck had an idea for a laboratory particle sizer based on the LISST-100X...