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Sequoia - Model LISST-HAB -Harmful Algae Bloom (HAB) Monitoring Instrument
The LISST-HAB is a self-contained, stand-alone instrument system for use on profiling packages, towed and remote vehicle applications, for deployment during a HAB event. The system will continuously measure particle size distribution and concentration, along with the fluorescence of Phycocyanin (Freshwater HAB’s), Phycoerythrin (Marine HAB’s), Chlorophyll and beam attenuation.
- Complete package based on Small Angle Forward Scattering Laser Diffraction Technology
- Measures Particle Size and Concentration in 36 Size Classes
- Integrated with Turner Designs Cyclops-7F fluorometers engineered to detect Phycocyanin (freshwater HAB’s), Phycoerythrin (marine HAB’s), and Chlorophyll
- Internal programmable datalogger
- Small and Extended Battery Packs available for self-contained operation
- USB connection to PC for programming, offloading and real-time size distribution displays
- Programmable, autonomous data collection
- Integrated Depth and Fast Response Temperature Sensors
- Towable or integrated on profiling package or vehicle
Fluorometer Performance
The Turner Designs submersible instrumentation modules used in the LISST-HAB includes single-channel fluorometers for detection of chlorophyll, freshwater and marine HAB’s. Together with particle information from the LISST, this package solution provides a comprehensive picture of a HAB and its development.
Parameters Measured
- Particle Size Distribution from 1.0-500 μm in 36 size ranges
- Depth (600 m max depth @ 0.01 m resolution)
- Temperature @ 0.01°C resolution; Response time: 2.5 s.
- Optical transmission @ 0.1% resolution
- Volume Concentration @ 0.1μl/l resolution
- Beam transmission from 0.3-0.99 (30-99%)
- Phycocyanin (freshwater HAB’s)
- Phycoerythrin (marine HAB’s)
- Chlorophyll
Operating Concentration range
- Optical transmission from 0.3-0.99 (30-99%)
- Concentration from ~ 0.5-700 mg/l (particle-size dependent)
Fluorometer ranges
- Minimum: Detection
- Linear: Range
Phycocyanin
Phycoerythrin
Chlorophyll: 0.03 ug/l, 0-500 ug/l
Technology (laser diffraction)
- Small-angle forward scattering
- 32-ring custom photodiode Ring Detector + 4 large angle detectors
- 25 mm optical path
Mechanical and Electrical
- Dimensions: 63.9 cm (25.2”) L x 10.03 cm (3.95”) Ø
- Weight: 6 kg (13.2 lbs) in air; 2.5 kg (5.5 lbs) in water
- 600 m depth rating
- External power input: 12VDC nominal, 8-24 VDC
- Sampling rate: Up to 1 Hz
- Current drain at 12 V: 100 mA sampling, 8 mA between samples.
- Data storage: 1GB (~12,500,000 measurements)
- Connectors: S/S Impulse MCBH(WB)-3-MP, MCBH(WB)-5-MP, MCBH(WB)-6-MP
- Laser: 670 nm solid state diode laser
- Chlorophyll – EX 465 nm, EM 496 nm
- Phycocyanin – EX , EM
- Phycoerythrin – EX , EM