Microscope Eyepiece Reticules (Graticules) 

NG30 Matthews Spray Droplet Sizing

Eyepiece Reticle with Dots ranging from 0.050mm (50µm) to 0.400mm (400µm).

Technical Specification

For size and distribution assessments of aerosol droplets. Used with 4x objective for direct measurements of droplets groups of 50, 100, 200 and 400 microns diameter. W.H.O. and G.A. Mathews. Imperial College.

Glass Type and Thickness
Soda Lime 1.5mm thick

Diameter Tolerance
+0/-0.1mm

Orientation
Correct reading through glass