Sequoia Scientific, Inc. designs and manufactures the LISST series of laser, acoustic and holographic sensors used worldwide since 1995 for marine, freshwater, environmental, energy and industrial applications. These instruments are widely used from the deep sea to shallow mountain streams to your lab bench. The technology is designed to make superior size distribution & concentration measurements with repeatable accuracy.  Installations range from shipboard labs, fixed moorings, unmanned vehicles, oil rigs and remote monitoring stations. www.sequoiasci.com