Skip to main content
Figure 3 | Journal of Applied Volcanology

Figure 3

From: Homemade ashmeter: a low-cost, high-efficiency solution to improve tephra field-data collection for contemporary explosive eruptions

Figure 3

Steps to build the ashmeter. The arrows indicate where to achieve the actions described in the paragraph 1.2. 1) Remove the neck of the large bottle; 2) Remove the upper part of the large bottle; 3) Drill or cut holes in the lower part; 4) Drill a circular hole in the center of the lower part’s base; 5) Glue a large aperture flexible screen to the smaller aperture of the large bottle’s upper part; 6) Fix the funnel to the outer container; 7) Remove the bottom of the small bottle; 8) Create a thickness scale; 9) Drill a large hole in the cap of the small bottle; 10) Cut two plastic screens and a paper filter to fit in the cap; 11) Enclose the paper filter between the two plastic screens; 12) Assemble the different parts.

Back to article page