NG2 eyepiece reticles, original portion globes/circles

Porton - NG2The circle areas of the Porton greaticules increases with Root 2 progression, as do the divisions on the right hand side of the rectangle. These divisions are numbered for convenience. The rectangle size is 4.5 mm x .25 mm. Circle sizes in microns are 560, 400, 280, 200, 140, 100, 70, 50, and 35. The specimen is racked on the mechanical stage of the microscope and traverses are taken right across the deposit, sizing all the particles encountered.PatternDescriptionDiameterProductNG2Original Porton globes/circles.Surface chrome image.16mmEMS68024-1619mmEMS6...
Porton - NG2

The circle areas of the Porton greaticules increases with Root 2 progression, as do the divisions on the right hand side of the rectangle. These divisions are numbered for convenience. The rectangle size is 4.5 mm x .25 mm. Circle sizes in microns are 560, 400, 280, 200, 140, 100, 70, 50, and 35. The specimen is racked on the mechanical stage of the microscope and traverses are taken right across the deposit, sizing all the particles encountered.

Pattern Description Diameter Product
NG2 Original Porton globes/circles.
Surface chrome image.
16mm EMS68024-16
19mm EMS68024-19
21mm EMS68024-21

The use of the eyepiece graticules shown in this section makes it possible to analyse specimens containing particles as an alternative, or in addition to, sieving. Graticules for particle size analysis are particularly popular when there are only limited quantities of particles or where particles are smaller than 50 microns in diameter. Typical substances analysed are sand grains, soil particles, plant seeds, fertilisers, abrasives, liquid droplets, pigments, pulverised coal, silica, fibres, and fine dust.

The basic principle employed is to compare particles to the globes and circles of varying sizes that appear on the graticule - dark particles being compared to solids globes, and light or transparent ones to the circles. Naturally the procedure varies with the graticule concerned, more information about which is given below.

Please note that for calibration, the circles and globes will represent particles smaller in diameter by the magnification of the objective.

Code Title Diameter Pack Size Availability Price Updated: 16-04-2024
EMS68024-16 NG2 eyepiece reticles, original portion globes/circles 16mm Each See above $379.00 AUD
EMS68024-19 NG2 eyepiece reticles, original portion globes/circles 19mm Each See above $354.00 AUD
EMS68024-21 NG2 eyepiece reticles, original portion globes/circles 21mm Each See above $354.00 AUD