How to measure liquid height in capillary?

Hello, I am trying to measure liquid height in a 20 ul capillary tube. (https://www.sigmaaldrich.com/catalog/product/sigma/p2049?lang=en®ion=US&cm_sp=Insite-_-prodRecCold_xviews-_-prodRecCold10-7)...

04 November 2019 4,819 3 View