For two decades, Sequoia Scientific, Inc. in Bellevue, WA, has been the world’s only manufacturer of portable, field, and submersible laser particle sizers.

The US Geological Survey approves our trademark LISST laser particle sizers for field use and they are a standard in other parts of the world (e.g. China).

LISSTs are used for environmental monitoring, industrial, and scientific applications across the globe: Our unique submersible LISSTs help engineers, scientists, and monitoring agencies reliably measure the concentration and size of sediment, plankton and oil droplets in any water body.

For a wide range of industrial applications, from hydropower turbine monitoring to optimization of drilling operations, our portable and industrial LISSTs will get the job done.

For optical studies (e.g. underwater visibility for defense purposes), our HydroLight software package and submersible VSF meters are indispensable