Imhoff cone dimensions Biofloc Imhoff Cone 1000 ml Fiber Plastic, Floc measuring for Biofloc Fish Culture /Probiotic FCO. g. 3 Cover the cone with a watch glass. Research, industrial and healthcare professionals rely on SP Scienceware for their sample handling needs. 7 IS I 7232 - 1974 Indian Standard METHOD FOR IMHOFF CONE TEST 0. x 18-11/16" OD Hgt. WHEATON® Plastic Imhoff Cones. Jan 1, 2005 ยท All laboratory samples have been analysed through the following procedures: (1) turbidity analysis with a laboratory turbidimeter (manufacturer: Hach, model: 2100AN); (2) settleable solids in Imhoff cones; and (3) gravimetric analysis and particle size analysis with the pipette method. The test uses a cone, with or without a stopcock, and the volume of solids is recorded after a specific time period using the graduated markings at the bottom of the cone. Imhoff Cone Racks constructed of plated, heavy gauge steel and are available in three- or four-place models.