Scintillation is what makes stars twinkle. It is what causes mirage in deserts or on hot surfaces. It is what causes shimmer underwater in the vicinity of hot vents in oceans. These effects result from temperature fluctuations in air or water. The same...
Is there a low velocity threshold for the LISST-SL? Does it need a minimum flow speed in order to sample? What is that? Absolutely! The internal pump in the SL will adjust the intake velocity to match the ambient flow speed in order to make the sample...
Sequoia makes laser diffraction and acoustic backscatter sensors for this application. On-line monitoring of silt in hydro-power plants is a reality using Sequoia’s LISST-Infinite or LISST-Hydro instruments, designed specifically for this purpose....
Turbidity shows no response to large particles, gets concentration wrong [Sequoia, January 09, 2013] The use of turbidity sensors is widely prevalent in the sediment community. The common practice is to calibrate the turbidity meter...
Optical Transmission: What is it, what it means, and how it is used in LISST instruments [Sequoia, July 12, 2012] Optical transmission is a measure of what proportion of light is transmitted through a turbid medium. Light may be attenuated due to absorption...