Sequoia’s LISST-200X has been designed to cover a wide range of particle concentrations. However, at high concentrations the light scattering from the particles can include multiple scattering. This will affect the measurement of particle size and concentration. The concentration where multiple...
January’s featured paper is here! Lepage H, Masson M, Delanghe D, Le Bescond C (2019): Grain Size Analyzers: Results of an Intercomparison Study. SN Applied Sciences (2019) 1:1100 | Tl;dr: No instrument in particular stood out as better or worse. But you probably shouldn’t compare...
As reports over the last 3-4 decades demonstrate increasing plastic concentration in the oceans, public and regulatory concerns have grown in parallel. Sequoia Scientific Inc. and other instrument manufactures are thus frequently contacted by scientists and regulators seeking tools that measure...
The short explanation Briefly, the difference between turbidity and Super-Turbidity (Patent Pending) can be summarized as follows: Turbidity (NTU) = Optical Backscatter; Needs Calibration for SSC; less accurate Super-Turbidity (mg/l) = Optical & Acoustic Backscatter; No Calibration for SSC; more...
LISST-AOBS has Nearly Uniform Sensitivity Across Wide Grain Sizes! B Why the Acousto-Optic Super-Turbidity Sensor LISST-AOBS? The sensitivity (Volts/[mg/L] ) of Optical turbidity sensors varies inversely with grain size. Turbidity sensors are highly sensitive to fine particles, and insensitive to large...
Welcome to the first installment of Sequoia’s Fun Fact Series! Irregularly, we’ll post interesting facts about sediments in this Fun Fact Series. To kick it off, we’ll go all the way back to the beginning – the very first known measurement of sediment anywhere in the world. Incredibly,...
LISST-SL2 Is Demonstrated in Yangtze River, Wuhan, China [This article shows an example of river data from a boat; for bridge-lowered data, click here.] The Yangtze River hydrological facility is located in Wuhan on the western bank. A map of the location can be found here (30°37’41.59″...
Real Time Displays, and Immediate Averaged Results The new LISST-SL2 river sediment monitoring instrument is a greatly simplified and powerful device. The instrument transmits data immediately upon being lowered into water. Data can be viewed in real time, or after processing for averages. Click here...
This article is corrected and simplified,17 Sept. 2018 What is the measurable concentration range of LISST instruments? In Brief: The range of concentrations that LISST instruments can measure depends on particle size. For laser-diffraction LISST instruments, the recommended upper limit of concentrations...
First Particles in the Americas (PiA) to take place in Vitoria, Brazil. Dates: 24 September – 27 September 2018 For details, please go to the webpage for the conference; Click here. PiA is convened jointly by Sequoia Scientific, Universidad del Norte of Colombia, and Federal University...