LISST-100X

LISST-100X Submersible Particle Size Analyzer ? Particle Size Distribution ? Volume Scattering Function ? Optical Transmission ? Particle Volume Concentration The LISST-100X instrument obtains in-situ measurements of particle size distribution, optical transmission, and the optical volume scattering function (VSF). Using a red 670nm diode laser and a custom silicon detector, small-angle scattering from suspended particles is sensed at 32 specific log-spaced angle ranges. This primary measurement is post-processed to obtain sediment size distribution, volume concentration, optical transmission, and VSF. Temperature and depth are also recorded. Optionally, a SeaBird MicroCat 37-SI CTD can be integrated for high precision conductivity, temperature, and depth measurement. Alternatively a Campbell OBS-3+ or a Turner Designs Cyclops-7 fluorometer can be integrated upon request. Special versions with folded housing or a shorter housing with an external battery pack are available. A version for deep-ocean use (LISST-DEEP) is also available. For extended field deployment, our BIOBLOCK anti-fouling system option is recommended. FEATURES • Small angle forward-scattering laser diffraction technology • Self-contained with internal datalogger, CF memory module and alkaline battery pack • RS232 connection to PC for real-time size distribution displays • Programmable data collection • Integrated BioBlock connection • Optional extra feature: Can be configured to receive input from Campbell OBS-3+, Turner Designs Cyclops-7 fluorometer or Sea-Bird Micro-Cat CTD. SPECIFICATIONS Parameters Measured Particle Size Distribution, Optical Transmission, Depth, Volume Concentration, Temperature, Volume Scattering Function Technology Solid State Diode Laser @ 670 nm, 1mW Detector: 32-ring custom photodiode Sample Rate: Programmable, up to 25 Hz internally, 1 Hz saving to datalogger Optical Path: 50 mm standard. Bolt-on path reduction modules are available for higher concentration environments Sediment Size Distribution, Scattering Angles and Concentration 32 log-spaced size classes: 1.25-250 or 2.5-500 µm (0.08-15° or 0.04-7.5° in water) Range: 1-750 mg/L (approximate range based on 30 µm mean size particles) Resolution: <1 mg/L Mechanical and Electrical Dimensions: 5.25” (13.3 cm) Ø x 34.25” (87 cm) L Weight: 25 lbs (11 kg) in air; 8 lbs (3.6 kg) in water Depth Rating: 300 meters Serial Interface: RS232C, 9600 baud, High speed offload at 115K baud Alkaline Battery Pack: Custom 9V nominal, 42Ah External Power Input (optional): 12 VDC nominal, 10 to 24 VDC CF Memory Card: 128 Mb standard (1,600,000 size distributions) Battery Current Drain: 146 mA / 8 mA / 128 µA (measuring/quiescent/sleeping) SEQUOIA SCIENTIFIC, INC. 2700 Richards Road, Suite 107 Bellevue, WA 98005 USA Phone (425) 641-0944 Fax (425) 643-0595 www.SequoiaSci.com info@SequoiaSci.com Submersible Particle Size Analyzer LISST-100X