Microscope Eyepiece Reticules (Graticules) 

NE29 Whipple Grid

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

The NE29 Whipple Grid is often used with the new Plain Sedgewick Rafter counting chamber, the S53

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

Please note that we all supply a version of the NE29 with a 10mm x 10mm grid of 1mm squares - please enquire for this version.

Line Thickness
0.015mm +/-0.003mm & 0.020mm +/-0.003mm CL

Glass Type and Thickness
Soda Lime 1.5mm thick

Overall Tolerance
+/-0.010mm

Diameter Tolerance
+0/-0.1mm

Orientation
Correct reading through glass