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| Optical VSF Sensors > LISST-100X |
LISST-100X
LISST-100X optics end
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The LISST-100X instrument is a multi-parameter system for in-situ
observations of the particle size distribution. It also records the optical
transmission, pressure and temperature as supporting measurements. Laser light scattering at 32 angles is the primary information
that is recorded. This primary measurement is mathematically inverted
to get the size distribution, and also scaled to obtain the volume
scattering function (VSF), see Application Note L002. The size
distribution is presented as concentration (micro-l/l) in each of 32
log-spaced size bins and the VSF as scattering (m-1 sr-1).
The instrument is fully
self-contained with battery and data-logger. It can be used with
supplied programs, or in specially designed modes, e.g. event triggered
based on storms (pressure variance) or fronts (temperature front). Two
size-ranges are available: 1.25-250 microns (Type-B) and 2.5-500
microns (Type-C). Standard memory size is 16MB, suitable for storing
approximately 200,000 size distributions and VSF's, with option to expand to 126MB,
or 1,600,000 size distributions and VSF's. Special versions are available for
deep-ocean, high-concentration, or low-concentration environments. At
the heart of the instrument is a collimated laser diode and a specially
constructed annular ring detector (see Application Note L001).
An auxiliary salinity sensor is available as an
option to obtain full CTD capability, see Application Note L003.
Designed for extended field application, the LISST-100X is a
self-contained battery-powered instrument that can be deployed on a
tripod, used in a profiling mode, towed, or moored. A copper shutter, the BioBlock, is available to cover the lenses during long-term field deployments, thereby minimizing fouling of the lenses. Many custom
versions of the instruments have been built, including for deep-sea
applications. Custom inquiries are welcome.
Besides the BioBlock, numerous accessories are avaialble for the LISST-100X. These include clamps, optical path reduction modules for high concentrations, a variety of flow-through and mixing chambers for laboratory work, batteries and cables. Please see the accessories page for an up-to-date list of accessories for all LISST instruments.
Related Links
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|  | | GOT PLANKTON? |  | | LISST-100X laser particle sizer – not just for sediment or optics (c, vsf). It measures phytoplankton size distribution too! Shown is phytoplankton size distribution from LISST compared to image analysis. Courtesy of Lee Karp-Boss.
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JFIC2010
Las Vegas, NV, 27-29 June 2010, booth 207
9th annual StormCon
San Antonio, TX, 2-4 August 2010, booth 421
Ocean Optics XX
Anchorage, AK, 25 September - 1 October 2010
CASQA
CA, 1-3 November
PiE 2010
Villefranche-sur-Mer, France, 15-17 November
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