• Two 128-photodiode linear arrays work independently as high-speed and high-resolution optical imaging probes.
• Captures two-dimensional images of particles passing through sample volume where laser beams overlap.
• The region where the beams overlap uniquely defines the depth-of-field (and thus the sample volume) for small particles.
• Response time is 10 times faster than the 2D-C.
• Particles as small as 10 microns imaged at 200 m/s.
• Greatly improved determination of sample volume and sizing of small particles less than 100 microns.
• Data rates up to 13 MB per second, compressed into binary file.
• Fits in standard PMS 2D canister and uses standard wiring.

• 2D-S is extremely easy to use. Turning on power to the probe automatically starts communication with the computer. Recording a data file is as easy as one button. Real-time software displays to the operator housekeeping data and a small sampling of the particles recorded. Artificial Intelligence parameters keep the instrument operating at its best, making the instrument almost hands-free with little necessary oversight. The 2D-S has been deployed on the NCAR C-130, SPEC Lear, NASA WB57, UND DC-8, and National Research Council (Canadian) Convair.


• SPEC's 2D-S data analysis software can calculate particle by particle dimensions yielding concentrations, extinctions, particle size distributions, ice water contents, and other microphysical properties. To see a screen capture with details of the 2D-S Recording and Analysis Programs click here.

• Read SPEC's paper on the 2D-S design and preliminary results.


• Read Alexei Korolev of Sky Tech Research's report:
  "Retrieval of Sizes of Spheroidal Particles from their Shadow Images".


• Read about the 2D-S Instrument Dimensions


• Request more information

SPEC Inc.
3022 Sterling Circle, Suite 200
Boulder, CO 80301. USA
Phone 303-449-1105   Fax 303-449-0132