Specialist Designs
Thompson - G23
For counting particles in any of three areas of known size. The graticule is calibrated in the same manner as a normal eyepiece scale. The result is then used to calculate the area of any square.
| Pattern |
Description |
Dia |
Cat # |
| G23 |
Thompson for dust analysis.
10 mm, 7 mm and 4 mm squares.
Glass Sandwich. |
16 mm |
68090-16 |
| 19 mm |
68090-19 |
| 21 mm |
68090-21 |