The LISST-Deep instrument is a 4,000 m rated version of Sequoia’s LISST-200X workhorse.
The LISST-Deep generally has the same capabilities as the LISST-200X but extends the operating depth range to 4,000 m.
LISST-Deep
Deep Submersible Particle Size Analyzer
Features
Features
- 4,000 meter depth rating (prior to 2020, rating was 3,000)
- Small angle forward scattering laser diffraction technology
- Measures particle size, concentration, beam attenuation, VSF, depth, temperature
- Self contained with internal programmable datalogger for autonomous data collection
- Externally powered
- Optional external battery pack, rated to 4,000 m depth
- USB connection to PC for programming, offloading and real-time size distribution displays
- Integrated depth and temperature sensor
- Power and integrate up to three external analog sensors
- 36 size classes
- Analog output of mean particle size and total volume concentration for CTD integration
- Real-time output of complete Particle Size Distribution
Specifications
Parameters measured
- Particle size distribution from 1 µm to 500 µm
- Depth (4,000 m max depth @ 0.1 m (10 cm) resolution)
- Optical transmission @ 0.1 % resolution
- Volume concentration @ 0.1 µl/l resolution
- Volume scattering function (VSF)
Operating concentration range
- Optical transmission from 0.3 to 0.985 (30 % to 98.5%)
- Concentration range 1 mg/l to 800 mg/l (very strongly grain-size dependent)
Technology
- Small-angle forward scattering
- 32-ring custom photodiode ring detector for small-angle VSF + 4 large angle detectors
- 50 mm optical path
Electrical
- Power input: 9 to 24 VDC
- Sampling rate: Up to 1 Hz
- Power drain: 120 mA / <50 mA / < 3 mA (measuring / waiting / sleeping)
- Data storage: 1 GB (~12,500,000 size distributions)
Mechanical
- Dimensions 12.6 cm (4.95”) dia. by 96.3 cm (37.9”) L
- Weight in air / water: 18.6 kg / 9.5 kg (41 lbs / 21 lbs)
- Weight of optional battery housing & pack in air / water: 9.9 kg / 5.4 kg (22 lbs / 11.6 lbs)
- Maximum depth: 4,000 m (for serial numbers 4050 and higher)
Software & Downloads
Accessories
LISST-Deep Item # and Description
| Item # | Description | Thumbnail |
|---|---|---|
| SEQ-FP-LDP | LISST-Deep 4000 m Sediment Size Distribution Sensor 1 um to 500 um size range 4000 m depth rating. Includes: -1 GB of memory -2 m communications cable -Laser cable -Pelicase with custom foam cushioning. -Includes Windows software for programming, data offload and data analysis. NOTE: The LISST-Deep is designed for external power only. It has no internal batteries. External Battery Housing for LISST-Deep available separately. *Must order power cable separately. | |
| SEQ-AC-LDP-EW | 1-YEAR EXTENSION OF LIMITED WARRANTY AND LIABILITY Must be purchased together with new instrument. | No picture |
| SEQ-AC-LDP-SERV | 3-YEAR SERVICE PLAN One-time service of instrument within 36 months after delivery. Includes one-way return shipping from Sequoia, all evaluation, diagnosis, testing and calibration. Parts and labor for repairs not included. Must be purchased together with new instrument. NOTE: End-user responsible for return shipment DDP to Sequoia. | No picture |
LISST-Deep Accessories *NOT INCLUDED* with LISST-Deep
| Item # | Description | Thumbnail |
|---|---|---|
| SEQ-AC-LDP-EBP | External battery housing for LISST-Deep Depth rating 4000 m. One installed and one spare LISST-Deep battery (SEQ-AC-LDP-BAT). Includes stands, clamps and cables for connecting to LISST-Deep. Ships in Pelican case with custom foam cushioning. | |
| SEQ-AC-LDP-SCBL-AA | LISST-Deep to CTD cable Replacement 2 m cable with Impulse AG206-FS on each end wired pin to pin. Used to connect LISST-Deep to SeaBird CTD Auxiliary input with Impulse AG-306-HP-SS bulkhead connectors. |  |
| SEQ-AC-LDP-BAT | Replacement alkaline battery for LISST-Deep 12 V. Non-rechargeable. | |
| SEQ-AC-LDP-FRM | LISST-Deep frame for easy integration into CTD frame. | COMING! |
LISST-Deep Accessories *INCLUDED* with LISST-Deep
| Item # | Description | Thumbnail |
|---|---|---|
| SEQ-AC-LDP-BCS | 50 cm cable to external battery housing. |  |
| SEQ-AC-LDP-LCBL | Replacement LISST-Deep Laser Cable Replacement 0.65 m cable with Impulse MCIL-6-FS on each end wired pin to pin with locking sleeves. Used to connect laser end of LISST-Deep to electronics end of LISST-Deep. |  |
FAQ
Can I rent the LISST-Deep?
Currently (March 2024), no LISST-Deep rental units are available.
How does the LISST-Deep differ from the LISST-200X?
Apart from the obvious differences in the mechanical design, the LISST-Deep differs from the LISST-200X mainly with respect to available accessories. For the LISST-Deep, only a frame and an optional external battery housing are available.
Is there a BioBlock option for the LISST-Deep?
No. Sequoia does not offer a BioBlock option for the LISST-Deep.