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  • Articles | Sequoia Scientific
    use How long do they last All instruments use custom made alkaline battery packs except the LISST Portable with touch panel display and the LISST Portable XR that uses rechargeable Lithium Ion Li ion batteries Older versions of the LISST Portable uses rechargeable Nickel Metal Hydride NiMH batteries The LISST 100X and What is a shape model and which should I choose For the LISST 100X and LISST Portable particle sizers the user has an option to choose between two different shape models for inverting the scattering pattern into a size distribution The two models are called Spherical and Randomly shaped particles The Spherical particle model performs the mathematical On line monitoring of silt in hydro power plants 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 The LISST Infinite and LISST Hydro measures the Are there any instrument specific files that I need in order to use my LISST 100X LISST Deep or LISST STX Yes The files called factory zsc xxxx asc ringarea xxxx asc where xxxx is the serial number are instrument specific Also the files InstrumentData txt and LISST ini contains instrument specific information but these two files can contain information for multiple instruments This is not the case LISST Technology Shows What Turbidity Measurements Miss out in a River Profile 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 with some representative samples and then Optical Transmission What is it Optical Transmission What is it what it means and how it

    Original URL path: http://www.sequoiasci.com/library/articles/page/2/ (2016-02-13)
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  • Application Notes | Categories | Sequoia Scientific
    distribution can cause the two data to not track Neither sensor holds calibration with changing grain size Read more Sediment Monitoring during Dredging Operations November 5 2015 Waterways Maintenance Dredging and Contaminated Sediment Removal Dredging is essential for creation or maintenance of navigation channels as well as for removing contaminated sediments The contamination of water by dredged sediments is regulated Read more Comparing Optical Turbidity With LISST ABS August 27 2015 For measuring suspended sediments the use of optical backscatter sensors or other turdibity sensors is widespread At the same time it is understood that these sensors respond to total particle area not volume or mass In other words optical turbidity Read more How The LISST ABS Works May 1 2015 Updated 2 Feb 2016 INTRODUCTION Sequoia s Acoustic Backscatter Sensor LISST ABS is designed to measure suspended sediment concentration at a point Unlike ADCP s which may record similar backscatter strength at multiple points along the Read more Sensitivity of Response of LISST ABS and OBS to Size Distribution Changes April 30 2015 This Note shows how the calibration of the LISST ABS acoustic backscatter sensor and of optical backscatter sensor OBS changes when water contains a broad distribution of particle sizes and why LISST ABS is inherently superior Particle size distributions Read more Previous More in About About Suspended Sediment Concentration and Particle Sizing Methods Course Staff News PiE Conference 2014 PiE Conference 2014 Customer List Newsletter Contact International Distributors Our Newsletter Sign up to get the latest news on Sequoia and our products Home Products Product Overview LISST Instruments LISST 100X LISST ABS LISST Portable XR LISST Holo LISST Deep LISST StreamSide LISST STX LISST Hydro LISST Infinite LISST VSF LISST STOKES Optical VSF Sensors LISST SL LISST 25X FlowControl Instruments FlowControl Lab FlowControl Sub Radiative Transfer

    Original URL path: http://www.sequoiasci.com/article_category/application-notes/ (2016-02-13)
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  • Data Processing | Categories | Sequoia Scientific
    Read more How to Compute the Mean Particle Diameter from a LISST Volume Distribution November 11 2013 How to Compute the Mean Particle Diameter from a LISST Volume Distribution Sequoia March 26 2010 In the table below the computation of the mean particle size from a LISST volume distribution is outlined Column A is the size class Read more What is the acceptance angle of the LISST instruments October 11 2013 The acceptance angle of the LISST 100X LISST STX transmission measurement differs between instruments IN AIR the LISST 100X type C has an acceptance angle of 0 0177 degrees while a type B has an acceptance angle of 0 0353 degrees The discontinued Read more What is a shape model and which should I choose September 23 2013 For the LISST 100X and LISST Portable particle sizers the user has an option to choose between two different shape models for inverting the scattering pattern into a size distribution The two models are called Spherical and Randomly shaped particles The Read more Are there any instrument specific files that I need in order to use my LISST 100X LISST Deep or LISST STX August 30 2013 Yes The files called factory zsc xxxx asc ringarea xxxx asc where xxxx is the serial number are instrument specific Also the files InstrumentData txt and LISST ini contains instrument specific information but these two files can contain information Read more Previous More in About About Suspended Sediment Concentration and Particle Sizing Methods Course Staff News PiE Conference 2014 PiE Conference 2014 Customer List Newsletter Contact International Distributors Our Newsletter Sign up to get the latest news on Sequoia and our products Home Products Product Overview LISST Instruments LISST 100X LISST ABS LISST Portable XR LISST Holo LISST Deep LISST StreamSide LISST STX LISST

    Original URL path: http://www.sequoiasci.com/article_category/data-processing/ (2016-02-13)
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  • LISST-100X | Categories | Sequoia Scientific
    in LISST The Importance of Temperature Differences July 24 2014 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 Read more How to Compute the Mean Particle Diameter from a LISST Volume Distribution November 11 2013 How to Compute the Mean Particle Diameter from a LISST Volume Distribution Sequoia March 26 2010 In the table below the computation of the mean particle size from a LISST volume distribution is outlined Column A is the size class Read more What is the acceptance angle of the LISST instruments October 11 2013 The acceptance angle of the LISST 100X LISST STX transmission measurement differs between instruments IN AIR the LISST 100X type C has an acceptance angle of 0 0177 degrees while a type B has an acceptance angle of 0 0353 degrees The discontinued Read more What type of batteries do the instruments use How long do they last October 11 2013 All instruments use custom made alkaline battery packs except the LISST Portable with touch panel display and the LISST Portable XR that uses rechargeable Lithium Ion Li ion batteries Older versions of the LISST Portable uses rechargeable Nickel Metal Hydride Read more Previous More in About About Suspended Sediment Concentration and Particle Sizing Methods Course Staff News PiE Conference 2014 PiE Conference 2014 Customer List Newsletter Contact International Distributors Our Newsletter Sign up to get the latest news on Sequoia and our products Home Products Product Overview LISST Instruments LISST 100X LISST ABS LISST Portable XR LISST Holo LISST Deep LISST StreamSide LISST STX LISST Hydro LISST Infinite LISST VSF LISST STOKES Optical VSF Sensors

    Original URL path: http://www.sequoiasci.com/article_category/lisst-100x/ (2016-02-13)
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  • LISST-ABS | Categories | Sequoia Scientific
    in grain size distribution can cause the two data to not track Neither sensor holds calibration with changing grain size Read more Sediment Monitoring during Dredging Operations November 5 2015 Waterways Maintenance Dredging and Contaminated Sediment Removal Dredging is essential for creation or maintenance of navigation channels as well as for removing contaminated sediments The contamination of water by dredged sediments is regulated Read more LISST ABS for Protecting Hydro Turbines from Abrasion October 23 2015 Sequoia manufactures two instruments based on laser diffraction for monitoring sediments entering hydro turbines These are the LISST Hydro and LISST Infinite These two produce data on sediment concentration sorted into 3 size classes fine 75μm Read more Comparing Optical Turbidity With LISST ABS August 27 2015 For measuring suspended sediments the use of optical backscatter sensors or other turdibity sensors is widespread At the same time it is understood that these sensors respond to total particle area not volume or mass In other words optical turbidity Read more How The LISST ABS Works May 1 2015 Updated 2 Feb 2016 INTRODUCTION Sequoia s Acoustic Backscatter Sensor LISST ABS is designed to measure suspended sediment concentration at a point Unlike ADCP s which may record similar backscatter strength at multiple points along the Read more Previous More in About About Suspended Sediment Concentration and Particle Sizing Methods Course Staff News PiE Conference 2014 PiE Conference 2014 Customer List Newsletter Contact International Distributors Our Newsletter Sign up to get the latest news on Sequoia and our products Home Products Product Overview LISST Instruments LISST 100X LISST ABS LISST Portable XR LISST Holo LISST Deep LISST StreamSide LISST STX LISST Hydro LISST Infinite LISST VSF LISST STOKES Optical VSF Sensors LISST SL LISST 25X FlowControl Instruments FlowControl Lab FlowControl Sub Radiative Transfer Models EcoLight S HydroLight

    Original URL path: http://www.sequoiasci.com/article_category/lisst-abs/ (2016-02-13)
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  • LISST-Deep | Categories | Sequoia Scientific
    in air or water The same Read more How to Compute the Mean Particle Diameter from a LISST Volume Distribution November 11 2013 How to Compute the Mean Particle Diameter from a LISST Volume Distribution Sequoia March 26 2010 In the table below the computation of the mean particle size from a LISST volume distribution is outlined Column A is the size class Read more Are there any instrument specific files that I need in order to use my LISST 100X LISST Deep or LISST STX August 30 2013 Yes The files called factory zsc xxxx asc ringarea xxxx asc where xxxx is the serial number are instrument specific Also the files InstrumentData txt and LISST ini contains instrument specific information but these two files can contain information Read more How Accurate is the Concentration Measurement by LISST Instruments April 24 2012 LISST Concentration Accuracy Sequoia April 24 2012 First of all one must acknowledge that there are two types of errors Random errors and Bias errors Random errors can be averaged out whereas bias errors cannot see figure Read more vdcorr m October 31 2011 vdcorr m Sequoia October 31 2011 MATLAB script to correct 1 vd from invert p for the correct VCC can be found in the InstrumentData txt file or in the LOG file for LISST Portable and LISST StreamSide 2 vd to the laser Read more Previous More in About About Suspended Sediment Concentration and Particle Sizing Methods Course Staff News PiE Conference 2014 PiE Conference 2014 Customer List Newsletter Contact International Distributors Our Newsletter Sign up to get the latest news on Sequoia and our products Home Products Product Overview LISST Instruments LISST 100X LISST ABS LISST Portable XR LISST Holo LISST Deep LISST StreamSide LISST STX LISST Hydro LISST Infinite LISST VSF LISST

    Original URL path: http://www.sequoiasci.com/article_category/lisst-deep/ (2016-02-13)
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  • LISST-Holo | Categories | Sequoia Scientific
    scenarios powering up idling sampling and sleeping Power Up Idling Sampling Sleeping LISST 100X Read more MBARI tests LISST HOLO on Autonomous Underwater Vehicles AUV s June 23 2011 Monterey Bay Aquarium Research Institute tests LISST HOLO on AUV s Sequoia June 23 2011 The Monterey Bay Aquarium Research Institute MBARI tested Sequoia s LISST HOLO sensor in April 2011 during a coastal oceanography Read more What are the concentration limits for the LISST HOLO June 7 2011 LISST HOLO concentration limits Sequoia June 7 2011 The article LISST Concentration Limits describes how to compute the upper concentration limits for the LISST instruments However the results in that article does Read more Comparing volume concentration and mass concentration April 7 2010 How does µl l and mg l compare Sequoia April 7 2010 A question that Sequoia often gets asked is How does the volume concentration in units of µl l from the LISST compare to mass concentration in mg l And how do I convert Read more Schlieren LISSTs July 7 2008 The influence of schlieren on in situ optical measurements used for particle characterization Sequoia July 7 2008 Mikkelsen OA Milligan TG Hill PS Chant RJ Jago CF Jones SE Krivtsov V Mitchelson Jacob G 2008 The influence Read more More in About About Suspended Sediment Concentration and Particle Sizing Methods Course Staff News PiE Conference 2014 PiE Conference 2014 Customer List Newsletter Contact International Distributors Our Newsletter Sign up to get the latest news on Sequoia and our products Home Products Product Overview LISST Instruments LISST 100X LISST ABS LISST Portable XR LISST Holo LISST Deep LISST StreamSide LISST STX LISST Hydro LISST Infinite LISST VSF LISST STOKES Optical VSF Sensors LISST SL LISST 25X FlowControl Instruments FlowControl Lab FlowControl Sub Radiative Transfer Models EcoLight S HydroLight

    Original URL path: http://www.sequoiasci.com/article_category/lisst-holo/ (2016-02-13)
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  • LISST-Portable | Categories | Sequoia Scientific
    by dredged sediments is regulated Read more Scintillation effect in LISST The Importance of Temperature Differences July 24 2014 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 Read more What is a shape model and which should I choose September 23 2013 For the LISST 100X and LISST Portable particle sizers the user has an option to choose between two different shape models for inverting the scattering pattern into a size distribution The two models are called Spherical and Randomly shaped particles The Read more LISST Portable and Stormwater May 16 2012 LISST Portable used by USGS in stormwater research Sequoia May16 2012 Sequoia s LISST Portable is used for stomwater research by Bill Selbig with the USGS Water Science Center in Wisconsin He is featured in an article Read more How Accurate is the Concentration Measurement by LISST Instruments April 24 2012 LISST Concentration Accuracy Sequoia April 24 2012 First of all one must acknowledge that there are two types of errors Random errors and Bias errors Random errors can be averaged out whereas bias errors cannot see figure Read more Previous More in About About Suspended Sediment Concentration and Particle Sizing Methods Course Staff News PiE Conference 2014 PiE Conference 2014 Customer List Newsletter Contact International Distributors Our Newsletter Sign up to get the latest news on Sequoia and our products Home Products Product Overview LISST Instruments LISST 100X LISST ABS LISST Portable XR LISST Holo LISST Deep LISST StreamSide LISST STX LISST Hydro LISST Infinite LISST VSF LISST STOKES Optical VSF Sensors LISST SL LISST 25X FlowControl Instruments FlowControl Lab FlowControl Sub

    Original URL path: http://www.sequoiasci.com/article_category/lisst-portable/ (2016-02-13)
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