G23 Thompson Graticule, 19mm

Specialist Designs

Thompson - G23, 19 mm

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.

  • Thompson for dust analysis.
  • 10 mm, 7 mm and 4 mm squares.
  • Glass Sandwich.
SKU: 68090-19
Pack: Each