Microscope Eyepiece Reticules (Graticules) 

NE29B Whipple Grid, 10mm x 10mm version

Whipple Grid 100 squares in 10mm² area (10x10 Grid), centre square further divided into 5 x 5 grid. 7mm² standard version also available

Technical Specification

Originally designed for water particle analysis, it can be used for other aspects of particle counting. Ratio of full square to smallest is 50:1. Area Ratio is 1200:1

Line Thickness
0.015mm, +/-0.003mm & 0.024mm, +/-0.003mm CL

Overall Tolerance
+/-0.010mm

Orientation
Correct reading through glass

Glass Type and Thickness
Soda Lime 1.5mm thick

Diameter Tolerance
+0/-0.1mm