Figure 2

Material requirements to construct an ashmeter. 1) Large plastic bottle; 2) small plastic bottle; 3) large aperture (> 2 mm) flexible plastic screen; 4) small aperture (< 2 mm) rigid plastic screen; 5) paper filter (resistant kitchen paper); 6) flexible wire; 7) hot silicone glue gun; 8) permanent marker; 9) inner gauge scale on transparent acetate sticker; 10) transparent adhesive tape; 11) masking tape; 12) scissors; 13) small handheld rotary tool with 14) accessories (circular saw and drill); 15) electronic scale.