Set turbidity standards T CAL (<0,1, 20, 200, 800 NTU) 495 69 2 is used for numerous applications N1064368 250 is used for numerous applications including the conversion of phenols and imines into triflic esters and NTf groups Purpose: Coverslips for counting chambers and haemocytometers are accessories for in vitro diagnostic examinations in optical microscopy and are used to cover cell suspension in counting chambers and to limit the volume of the cell suspension above the counting grid eliminating any need for preparation This set delivers all of the concentrations needed to calibrate and verify the TB 211 IR and TB 300 IR Turbidimeter