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| Particle Size Analyzers > LISST-100X |
LISST-100X
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Laser principle
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The workhorse instrument of Sequoia, the LISST-100X, is a multi-parameter system for in-situ
observations of particle size distribution. It also records the optical
transmission, pressure and temperature. It features an automatic gain switch for clear water use and is compatible with the BioBlock anti-fouling copper shutter , also developed by Sequoia Scientific.
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 16KB, suitable for storing
approximately 200,000 size distributions, with option to expand to 126MB,
or 1,600,000 size distributions. 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).
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. Optical transmission, water depth and temperature
are recorded as supporting measurements.
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. Many custom
versions of the instruments have been built, including for deep-sea
applications. Custom inquiries are welcome.
Various types of accessories are avaialble for the LISST-100X,
including a range of mixing and flow-through chambers for
laboratory/in-line applications, long communication cables for
real-time communication during profiling applications, clamps and wires
for profiling applications, optical path reduction modules for high
concentration applications, and spare batteries.
Deliveries of the predecessor to the LISST-100X, the LISST-100, has been stopped. However, upgrades can be provided. Contact us for price quotes.
Related Links
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|  | | LISST-WING |  | | Sequoia announces the availability of the airborne cloud droplet sensor based on laser diffraction technology. Key features: a large swept volume (90 l/s at 60 knots airspeed), no need for velocity data, and up to 16Hz recording of the size distribution. For more information, contact us. | |  | |  | | | |
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