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  • LISST-StreamSide | Sequoia Scientific
    background collection 5 inch graphics touch panel display for configuration and size distribution display Built in compact flash memory 128Mb standard expandable to 4Gb Size and volume distribution is computed on board and saved as ASCII file compatible with Excel Nominal 12VDC power 110VAC or 220VAC optional Sealed NEMA 4X housing with clear cover and lock Specially designed 12V sealed pump is available and recommended for use with the LISST StreamSide Specifications Sediment concentration ranges Concentration range 10 8 000 mg l NOTE Actual range is dependent on the grain size and size distribution of the suspended particles See table below for details and examples of concentration ranges based on measurements using ISO particle standards and easily obtained reference materials SMD Sauter Mean Diameter Resolution 1 mg l Material SSC mg l 98 optical transmission SSC mg l 30 optical transmission D10 µm D50 µm D90 µm SMD µm ISO Fine ISO 12103 1 A2 12 700 1 5 7 41 3 ISO Coarse ISO 12103 1 A4 52 1525 4 38 99 10 Whitehouse 20 30 µm glass beads 85 4450 19 24 34 24 Sieved sand 75 125 µm 135 8110 85 122 175 112 Sediment size distribution 32 log spaced size classes 1 9 to 387 µm size range for natural random shaped particles Sample acquisition time 1 second for 30 measurement average Typical maximum sample rate is 1 size distribution every 5 minutes Number of measurements per average and sample rate is programmable Mechanical and electrical Dimensions 30x25x18 cm HxWxD Power 6 15VDC 500ma max during sampling not including pump Communications RS 232 9600 baud Software Downloads Manual pdf Technical Specifications pdf Firmware 3 22 Current as of 7 November 2011 zip Installer Package February 2012 W7 64 bit compatible zip MATLABScripts zip Motocross zip Accessories

    Original URL path: http://www.sequoiasci.com/product/lisst-streamside/ (2016-02-13)
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  • LISST-STX | Sequoia Scientific
    reduction module and a custom mixing chamber The LISST STX is a fully autonomous battery operated self contained unit It is engineered for low power consumption and built to withstand the rigors of field deployment Easy to program features permit flexibility in duration of experiments and in operating modes Featuring Small Angle Forward Scattering Laser Diffraction Technology 670 nm Turbulence suppressing settling column Submersible to 200 m depth Self contained with internal data logger and non rechargeable battery pack Programmable data collection Parameters Measured Settling Velocity Particle Size Distribution Particle Volume Concentration Optical Transmission Water Temperature Specifications Settling velocities are estiamted for 8 log spaced size classes covering the range 1 25 250 microns Type B or 2 5 500 microns Type C In a Settling Experiment a water sample is drawn and trapped The evolution of the size distribution near the base of the settling column during the settling experiment is interpreted to estimate settling velocities In addition to particle size distribution histories with each settling experiment water pressure and temperature are also recorded Sediment concentration Range 1 750 mg l 1 actual range depends on grain size Resolution 1 mg l 1 Sediment size distribution and settling velocities 32 log spaced size classes for the size distribution 8 log spaced size classes for the settling velocity distribution Settling velocities from 100 mm s to 0 01 mm s 1 25 250 µm OR 2 5 500 µm size range to be selected upon ordering Mechanical and electrical Dimensions 32 L x 5 Ø 81 3 cm x 12 7cm Settling tube 19 25 high x 2 13 square 48 9 cm x cm Weight in air 35 lbs 15 9 kg Weight in water 18 lbs 8 2 kg Internal Data Storage 1 000 000 size distributions or

    Original URL path: http://www.sequoiasci.com/product/lisst-stx/ (2016-02-13)
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  • LISST-Hydro | Sequoia Scientific
    a pipe or hose e g from the draft tube The LISST HYDRO is designed to operate with line power A SCADA data display on a dedicated monitoring computer in the powerhouse is available With the LISST HYDRO Sequoia offers economical turnkey solutions for hydro power monitoring applications Features Specifications Gallery Software Downloads Accessories FAQ Features Designed for autonomous use Operates from 110 220VAC 50Hz line power Self contained system transmits data to monitoring PC not included over RS 485 LISST Infinite Master Controller and LISST Infinite Monitor software included Submersible well pump for sample intake acquisition optional Built in clean water source level monitoring Automatic background blanking for improved long term performance Warnings for high sediment concentrations on dedicated monitoring PC not included Built in automatic ultrasonic cleaning LISST Hydro brochure Specifications Sediment concentrations 10 8 000 mg l 1 mg l resolution NOTE Actual range is dependent on the grain size and size distribution of the suspended particles See table below for details and examples of concentration ranges based on measurements using ISO particle standards and easily obtained reference materials SMD Sauter Mean Diameter 1 9 to 387 um particle size range for natural random particles in 32 size classes Accuracy as per USGS acceptance criteria Measured Parameters Detailed particle size distribution Detailed volume concentration Optical transmission Mechanical and Electrical Dimensions 18 5 x 14 x 7 5 H x W x D Weight 12 kg Mounting Wall mounting only Water pressure 5 psi or less 4 20 mA or MODBUS output available upon request Software Downloads LISST Hydro product brochure Accessories FAQ How to Buy Call to speak with our sales team about purchasing or leasing options 866 212 2226 International 1 425 641 0944 or Request Quote Related Articles Related Products LISST Infinite Our Newsletter Sign

    Original URL path: http://www.sequoiasci.com/product/lisst-hydro/ (2016-02-13)
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  • LISST-Infinite | Sequoia Scientific
    acquisition system The customer must provide a low pressure source of turbid water extracted from either upstream or downstream of the turbine The pressure of the water stream must be less than 5 psi 0 34 bars and have a typical flow rate of around 6 liters per minute Alternatively Sequoia s LISST PUMP can be quoted as part of the instrument package for pumping water to the instrument from the reservoir siltation chamber or upstream of the intake 3 4 Cabling from instruments to monitoring PC No cable for connecting the LISST Infinite LISST HYDRO to the monitoring PC is included in the price for the instrument To receive a cable quote customer must provide Sequoia with drawings showing the intended routing of the cables from the instrument location to the control room with the monitoring PC 4 Customer responsibilities 4 1 Civil Works The customer will provide suitable civil works for housing of LISST Infinite near the desired sampling location The enclosed space must have a source of heat to maintain the temperature around the LISST Infinite greater than 5 deg C such that water does not freeze inside the instrument Freezing could damage subsystems The instrument warranty becomes void if the instrument is subject to freezing temperatures while operating Sequoia Scientific will provide detailed instrument dimensions technical specifications of the required space and can provide support for design if necessary Customer will be responsible for ensuring that cabling from instrument to monitoring PC s can be run in a suitable and appropriate manner 4 2 Instrument Power The LISST Infinite will require 220VAC power to power its systems The customer will provide 2 switched standard wall outlets near the desired mounting location of the LISST Infinite The two outlets can share a 15 amp breaker and will be used for powering the LISST Infinite system and other test equipment during installation 4 3 Contact Person Upon ordering the customer will identify an individual that will be responsible for receiving full training on the operation of the LISST Infinite and be the primary contact with Sequoia Scientific Inc personnel and or its agent 4 4 Installation Assistance During installation customer will provide a person who can immediately assist Sequoia personnel with the installation Of particular importance is unhindered access to cable trays pointing out walls that can be used for mounting the LISST Infinite LISST HYDRO and the clean water tank s assist with stringing cables provide permanent and unhindered access to a clean water source for filling the clean water tank s 5 Sequoia Scientific Inc Responsibilities Sequoia will provide LISST Infinite LISST HYDRO according to the Options selected by the customer as per quotation Sequoia or its agent will install the LISST sensor at the location agreed upon between Sequoia and customer Note that installation charges are NOT included in the price for the instrumentation itself All installation charges are to be quoted separately based on location expected duration of travel installation and number of personnel

    Original URL path: http://www.sequoiasci.com/product/lisst-infinite/ (2016-02-13)
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  • LISST-VSF | Sequoia Scientific
    photomultipliers This permits extraction of the particle scattering Mueller matrix elements P12 and a noisy estimate of P22 The VSF is identical to P11 The video below shows the roving eyeball of the LISST VSF in action Features Specifications Gallery Software Downloads Accessories FAQ Features In situ measurements of P 11 P12 and P22 elements of scattering Mueller matrix P11 is VSF from 15 150º VSF P11 only at small angles 0 05 to 10º in 32 logarithmic steps in angles Only two detectors employed with absolute radiant sensitivity A W calibration Beam attenuation measured with optics similar to our LISST 100X Roving Eyeball optics permit 1 degree resolution in angles between 15 150º Sampling rate at 3 seconds per measurement set involves 3 turns of Roving Eyeball with unpolarized vertical and horizontal polarized laser Daylight rejection by laser modulation Dynamic range in VSF measurements extended via laser power modulation Data from small and large angles in a single data stream including depth and temperature Specifications Parameters Measured Small angle VSF in 32 log spaced angles from 0 05 to 10º VSF P12 and P22 over 15 150º in 1º steps Temperature from 5º to 50ºC 0 1ºC resolution Depth 300 m max 10 cm resolution Operating Concentration Range Beam attenuation from 0 2 to 20 m 1 Technology Doubled YAG laser 532 nm Ring Detectors for small angle VSF Roving Eyeball and PMT at 15 150º Mechanical and Electrical Dimensions 12 7 cm 114 3 cm 5 0 45 0 Ø L Weight 15 6 kg 34 4 lbs in air xx kg x lbs in water 300 m depth rating 128 GB internal solid state drive equivalent to 24 000 measurements External power input 12VDC nominal 5A yes FIVE amps 9 20VDC Power drain xxµA 20mA xxmA 4

    Original URL path: http://www.sequoiasci.com/product/lisst-vsf/ (2016-02-13)
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  • LISST-STOKES | Sequoia Scientific
    MATLAB scripts which are supplied open source and free of charge with the instrument to the user No Windows software exists or will be supplied for the LISST STOKES the user MUST have MATLAB and be proficient in its use to process LISST STOKES data Features Specifications Gallery Software Downloads Accessories FAQ Features Although the LISST STOKES is designed for use in situ and can be submerged to a depth of 300 m it can also be used in a laboratory setting for measuring discrete samples The measurement frequency is one measurement every 27 seconds For this reason the LISST STOKES is not suitable for continuous profiling applications except in circumstances where the profiling is done in steps holding the instrument at a constant depth for at least 27 seconds Specifications This is accomplished using two independently switched linearly polarized fiber coupled lasers A 45 beam splitter divides the scattered light in two paths one part scatters onto a custom 32 angle ring detector from where the VSF is obtained The other part of the light passes through an analyzer and is detected by a CCD array From this measurement the depolarization ratio is obtained In addition to the depolarization ratio the VSF is obtained at 2 wavelengths red 658 nm and green 532 nm The angular range covered by the ring detector is 0 752 148 mrad IN WATER Software Downloads Accessories There are no available accessories for this instrument at this time FAQ How to Buy Call to speak with our sales team about purchasing or leasing options 866 212 2226 International 1 425 641 0944 or Request Quote Related Articles Related Products LISST VSF Our Newsletter Sign up to get the latest news on Sequoia and our products Home Products Product Overview LISST Instruments LISST 100X LISST

    Original URL path: http://www.sequoiasci.com/product/lisst-stokes/ (2016-02-13)
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  • Optical VSF Sensors | Sequoia Scientific
    Sequoia is the world s first commercially available submersible instrument for measuring depolarization in situ This is accomplished using two independently switched linearly polarized fiber coupled lasers A 45 beam splitter divides the scattered light in two paths one part scatters onto a ring detector from where the VSF is obtained The other part of the light passes through an analyzer and is detected by a CCD array From this measurement the depolarization ratio is obtained The instrument is designed for use in situ and can be submerged to a depth of 300m Temperature and depth as well as a measurement of the beam attenuation is made for each measurement Power is applied externally either via an external power cable or an external battery pack included The first LISST STOKES shipped in August 2010 Wide Angle VSF with Polarization using the LISST VSF The LISST VSF is an instrument that combines the small angle VSF capability of the LISST 100X with a wide angle capability and with additional information on polarization properties of the scattered light Like the LISST 100X the LISST VSF measures the VSF at small angles 0 1 to 15 degrees with identical optics Additionally with a novel new roving eyeball optics it obtains a measure of the depolarization element P12 and a noisy estimate of P22 The roving eyeball covers the angles 15 160º The depolarization ratio is the ratio M22 M11 where M22 and M11 are Mueller Matrix elements In the Mueller Matrix M11 is the VSF Any deviation of M22 M11 from unity is a measure of non sphericity and can thus potentially be used for detecting bubbles and oil droplets Specifications It describes the angular dependence of the fraction of incident light that scatters into different directions Integrating the VSF from 0 to

    Original URL path: http://www.sequoiasci.com/product/optical-vsf-sensors/ (2016-02-13)
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  • LISST-SL | Sequoia Scientific
    272 pixels 3 75 W x 2 12 H 16 bit color allows for easy programming and display of data without a PC Switch between ft and ft s or m and m s for depth and velocity units Data processing performed on board and stored in ASCII format Raw binary data can be post processed to obtain full size distribution A major difference between the LISST SL and other LISST instruments is that the LISST SL is only a sensor It cannot operate autonomously and no data can be stored on the instrument itself The LISST SL must be constantly connected using a USGS B Reel to a Topside Control Box TCB which contains a rechargeable battery and which receives the raw scattering data from the LISST SL itself Depth velocity and temperature are stored with each sample With the included depth data the system is capable of delivering sediment flux in the river Not only is it possible to measure the total flux since the LISST SL measures the concentration in each of 32 size bins it is possible to measure the size dependent flux of suspended sediment across the entire transect Data are transmitted up the USGS B reel to the topside Control Box equipped with a touch panel display showing depth temperature river current velocity mean grain size and total concentration in real time These data are stored together with date and time in an ASCII file which can be offloaded and immediately displayed in EXCEL or any other spreadsheet In order to obtain the detailed size distribution and volume concentration in 32 size classes the raw scattering data are also stored on the topside box The raw data can subsequently be offloaded and processed into the standard 32 size class volume distribution Specifications Sediment Concentration Range Range 15 13 500 mg l 1 for standard 3 2 mm optical path NOTE THE ACTUAL CONCENTRATION RANGE IS VERY HEAVILY GRAIN SIZE DEPENDENT Resolution 10 mg l 1 Material SSC mg l 98 optical transmission SSC mg l 30 optical transmission D10 µm D50 µm D90 µm SMD µm ISO Fine ISO 12103 1 A2 15 1 150 1 5 7 41 3 ISO Coarse ISO 12013 1 A4 67 2 500 4 38 99 10 Whitehouse 20 30 µm glass beads 130 7 400 19 24 34 24 Sieved sand 75 125 µm 215 13 500 85 122 175 112 Size Range 2 5 500 µm in 32 log spaced size classes Depth Range 0 15 30 m 0 02 m resolution Current Speed Range 0 8 m s 0 03 m s resolution Water Temperature Range 0 25C 0 1 C resolution Sample Acquisition Time 3 seconds for a 16 sample average Average value subsequently transmitted to the topside control box for immediate display Mechanical and Electrical Dimensions SL 13 cm 5 1 maximum Ø 75 cm 29 5 L Topside Box 40 6 cm 16 31 8 cm 12 5 16 5 cm 6

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