The PEN-RI has a measurement range of Refractive Index (nD) 1.3200 to 1.5100 which can be used to measure almost any sample.
a:2:{i:0;a:2:{s:4:"name";s:8:"Display:";s:3:"val";s:7:"digital";}i:1;a:2:{s:4:"name";s:14:"Configuration:";s:3:"val";s:6:"pocket";}}