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| Features | - Small angle forward-scattering laser diffraction technology
- Self-contained with internal datalogger and alkaline battery pack
- RS232 connection to PC for real-time size distribution displays
- Programmable data collection
- Expandable CF memory module
- Integrated BioBlock connection
| | | | Specifications (subject to change without notice) | Parameters Measured
| - Particle size distribution
- Particle volume concentration
- Volume scattering function
- Optical transmission
- Depth
- Temperature
| Sediment size distribution and scattering angles
| - 32 log-spaced size classes
- 1.25 - 250 or 2.5 - 500 µm size range (equivalent to scattering at 0.1-18º or 0.05-9º, respectively)
| | Sediment concentration | | | Technology | - Solid state diode laser @ 670 nm, 1mW
- 32-ring custom photodiode detector
- Sample rate programmable, up to 25 Hz internally, 1Hz saving to data logger
- Optical path length @ 50 mm standard; bolt-on path reduction modules are available for higher concentration environments.
| | Mechanical and electrical | - Dimensions: 13.3 cm diameter x 87 cm long (5.25" x 34.25")
- Weight: 11 kg (25 lbs) in air; 3.6 kg (8 lbs) in water
- 300 m depth rating
- Serial interface: RS232C @ 9600 baud; high-speed offload at 115K baud
- Alkaline battery pack: Custom 9V nominal, 42 Ah
- External power input (optional): 12VDC nominal, 10-24VDC
- Standard CF memory card: 128Mb (1,600,000 size distributions)
- Power drain: 146mA/8mA/128µA (measuring/quiescent/sleeping)
| Created 15 September 2008. Last update 15 September 2008
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|  | | Holographic Camera |  | | Sequoia announces that it has acquired a license from University of Plymouth (UK) for manufacture of a Holographic camera developed by Dr. Alex Nimmo Smith, for observation of large particles. The camera also has the potential to measure settling velocity. | |  | |  | | | |
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