Designed by Sequoia’s engineering team, the all new LISST-Tau is a high precision transmissometer for use on underwater vehicles, profiling platforms, CTD’s and other underwater sampling systems. The LISST-Tau precisely measures optical transmission and beam attenuation at depths down to 2,000 meters. https://lnkd.in/dFfs2BEJ #LISST #Transmissometer #environmentalimpact #environmentalsustainability #environmentalengineering #engineering #research #oceanscience #environmentalmonitoring #animation #video #howthingswork
Sequoia Scientific, Inc.
Appliances, Electrical, and Electronics Manufacturing
Bellevue, WA 1,792 followers
Sequoia designs and manufactures the LISST series of laser, acoustic and holographic sensors used worldwide since 1995.
About us
Since 1995, Sequoia Scientific, Inc. has been the global leader in technologies for submersible and field measurements of suspended particles, and particle size distributions. Sequoia invented the LISST series of aquatic science sensors in 1995. Since then, more than 40 different types of sensors have been developed, prototyped, or manufactured by Sequoia. Today, thousands of Sequoia instruments are in use, helping ocean and freshwater scientists and managers around the world better understand our oceans and the aquatic environment. All design and production takes place in our Bellevue, WA location. Our sales staff is located in Bellevue, WA and Mobile, AL. LISST was originally an acronym for our laser particle sizing sensors (Laser In Situ Scattering and Transmissometry). LISST now is ‘just’ a Sequoia trade name. Most of our instruments still use lasers in one way or the other to make measurements. A few use LED’s or acoustics. Sometimes two methodologies are used together. Several of our instruments measure the in-situ size and/or concentration of suspended particles – sediment grains, algae, flocs, oil droplets, air bubbles, aeolian sediment, drilling fluids etc. One model takes pretty particle pictures using holography. Others again measure water optical properties such as beam attenuation, Volume Scattering Function (VSF), and hyperspectral backscatter. The instruments are primarily used for ocean science and freshwater research and for environmental monitoring. However, some are used in select industries in a range of drilling fluid, hydropower, and general process control applications. How do you know if you need a LISST? Are you an oceanographer, limnologist, biogeochemist, geographer, geologist, soil scientist or coastal, environmental, consulting or drilling engineer? Or do you have an interest in (suspended) particle measurements or the optical properties of water? Or do you work in Industrial Process? Then we most likely have an instrument for you.
- Website
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http://www.SequoiaSci.com
External link for Sequoia Scientific, Inc.
- Industry
- Appliances, Electrical, and Electronics Manufacturing
- Company size
- 11-50 employees
- Headquarters
- Bellevue, WA
- Type
- Partnership
- Founded
- 1995
- Specialties
- Electro-optics, marine optics, oceanographic instrumentation, laser diffraction, light scattering, environmental monitoring equpiment, and environmental science
Locations
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Primary
Get directions
2700 Richards Road
Bellevue, WA 98005, US
Employees at Sequoia Scientific, Inc.
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Ole Mikkelsen
President & CEO at Sequoia Scientific, Inc.
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David Palmlund
Particle characterization for extracellular vesicles, virology, drug development, drug delivery, nanotoxicology and materials science…
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Jim Decker
Manager of Sales and Marketing at Sequoia Scientific, Inc.
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Gino Washington
Sales Engineer at Sequoia Scientific, Inc.
Updates
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Sequoia instruments measure IOP’s. What are they and why are they so critically important? IOP stands for ‘inherent optical property’—‘inherent’ in that they depend only upon the medium, for example, seawater including the dissolved and suspended materials within it. Two fundamental IOPs are the absorption coefficient and the volume scattering function (VSF). A third IOP often considered in oceanography is the beam attenuation coefficient, which is the sum of the absorption and total scattering coefficients. IOPs are independent of the ambient light field, for example, the position of the Sun; and are usually measured with ‘active’ sensors, meaning that they use a light source and detect how that light is affected by the medium. This independence allows IOPs to be measured across various platforms ranging from conventional moorings and marine vessels to remotely operated vehicles such as autonomous profilers and gliders. IOPs provide a means to quantify characteristics of in-water constituents such as phytoplankton and sediments to better understand water quality. They also provide a critical connection between the characteristic components in the seawater and the signal seen by ocean color satellites. Sequoia currently empowers scientists worldwide with multiple instruments for measuring IOPs in support of water quality and ocean color research: · LISST-200X and LISST-Deep Submersible Particle Size Analyzers measure beam attenuation in addition to particle size distribution · LISST-Tau High-Precision Transmissometer · Hyper-a Hyperspectral Absorption Instrument · Hyper-bb Hyperspectral Backscatter Instrument · LISST-VSF Multi-Angle Polarized Light Scattering Instrument · LISST-Horizon Flow-Through Automated Optical Scattering Measurement Learn more here: https://lnkd.in/gykXrFqT #LISST #Hyper
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Wishing America Happy 4th of July from the staff at Sequoia! On this National Holiday our office will be closed today, and re-opening July 5th https://lnkd.in/gwEqd86J #LISST #Liberty #Freedom
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Sequoia maintains an extensive library of technical papers where LISST technology is being applied. This valuable resource is maintained to inform other scientists, researchers, and technicians on how Sequoia instruments are exercised in science fields, academic study, and industry worldwide. Scan from hundreds of technical papers found in the Sequoia online library, and please let us know if a missing paper needs consideration Follow link here: https://lnkd.in/gbdyUriv #LISST
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Sequoia is a sponsor at the International Symposium on Environmental Hydraulics! This 10th International Symposium on Environmental Hydraulics (ISEH) is being held in Aberdeen, Scotland June 25th – 27th. The event brings together international experts to present and discuss new research, technical innovations and case studies relating to the symposium’s theme “environmental hydraulics for a sustainable and resilient future”. https://lnkd.in/gsRTeE89 #LISST
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TODAY in Scotland! Sequoia is a sponsor at the International Symposium on Environmental Hydraulics! This 10th International Symposium on Environmental Hydraulics (ISEH) is being held in Aberdeen, Scotland June 25th – 27th. The event brings together international experts to present and discuss new research, technical innovations and case studies relating to the symposium’s theme “environmental hydraulics for a sustainable and resilient future”. https://lnkd.in/gsRTeE89 #LISST
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Sequoia is a sponsor at the International Symposium on Environmental Hydraulics! The 10th International Symposium on Environmental Hydraulics (ISEH) is being held in Aberdeen, Scotland on the 25th – 27th June 2024. Sponsored by the International Association of Hydro-Environment Engineering and Research (IAHR), the 10th ISEH will build on the success of previous ISEH symposia in bringing together international experts to present and discuss new research, technical innovations and case studies relating to the symposium’s theme “environmental hydraulics for a sustainable and resilient future”. The Fluid Mechanics Research Group at the University of Aberdeen are proud to host the event, bringing the symposium to the UK for the first time in its history, and to Europe for the first time since the 6th ISEH held in Athens in 2010. It will be held within the University’s historic Old Aberdeen campus, providing an ideal setting in which to share knowledge and to meet old and new friends. https://lnkd.in/gsRTeE89 #LISST
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Importance of LISST data in dredging! Learn how LISST instruments are being applied in this vastly relevant market! A market with contracts impacting global ports, harbors, navigational channels, coastal erosion, dam removal and remediation efforts, all requiring monitoring by LISST instruments used to help manage compliance by operators, regulators, and scientists alike. https://lnkd.in/gKZQvy-v #LISST
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Sequoia will be closed today in observation and support of Juneteenth, Federal Holiday in America! The office will re-open on June 20th https://lnkd.in/gjiwY3pD #LISST #Freedom #Juneteenth
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“We bought LISST-Portable S/N 001 over 20 years ago and I’ve used it many times since, so I was curious to see the LISST-Portable|XR when it was purchased by a colleague of mine in 2022. I actually powered my old LISST-Portable up a few days ago, after locating a PC with a Windows 95 operating system, and it’s still working except for a couple of rings on the ring detector dropping out. Good to see the changes in the LISST-Portable|XR over the original LISST-Portable from 20+ years ago.” Ernest Arias, US Navy (2022) https://lnkd.in/ddaEjSNf #LISST #USNavy
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