Proportional Caliper device is used when evaluating performance of materials or mixes by determining percentages of flat and elongated particles, as well as shape characteristics, of coarse aggregate. Proportional Calipers are constructed of durable plated steel, feature opening ratios of 1:2, 1:3, 1:4, and 1:5, and are available in two models:
9101 Proportional Caliper features fixed posts and four threaded openings for repositioning the pivot screw to the required ratios.
9101-B Four-Station Proportional Caliper features openings for all four ratios with no need to reposition the pivot screw.
- Corrosion-resistant plated steel construction
- Optimal for fractions of 0.375in (9.5mm) or larger
- Replaceable posts