LISST-HOLO concentration limits [Sequoia, June 7, 2011] The article ‘LISST Concentration Limits‘ describes how to compute the upper concentration limits for the LISST instruments. However, the results in that article does NOT apply to Sequoia’s LISST-HOLO instrument, because the minimum  optical transmission that is allowable for the LISST-HOLO is 0.8 (80%) whereas it is 0.3 (30%) for the rest of the LISST instruments.So, what are the concentration limits for measurements with the LISST-HOLO instrument?These can be computed in the exact same manner as outlined in the ‘LISST Concentration Limits‘ article, but using an optical transmission of 0.8 instead of 0.3. This yields the following maximum concentrations (in mg/l) for a LISST-HOLO with a 50 mm optical path:  Sauter Mean Diameter  Wentworth Grades  Maximum Concentration  µm  Phi  mg/l  1.95  9.00  Clay  8  3.9  8.00  Very Fine Silt  15  7.8  7.00  Fine Silt  31  15.6  6.00  Medium Silt  62  31.25  5.00  Coarse Silt  123  62.5  4.00  Very Fine Sand  247  125  3.00  Fine Sand  494  250  2.00  Medium Sand  987   # # # Questions to this application note? Email us! Last Updated 12/11/2011