Bulk Density Tester May 2026

USP <616> specifies: 500 taps initially. If volume reduction >2% from 500 to 1250 taps, continue to 2000 taps. Most free-flowing powders stabilize by 500 taps.

Yes – use a 10 mL or 25 mL cylinder with 0.001 g balance. Some micro-tap density testers exist (e.g., Quantachrome Autotap with 5 mL insert). bulk density tester

Pycnometer measures true density (solid only, no voids). Bulk density tester includes voids. For the same powder, bulk density ≤ true density. USP &lt;616&gt; specifies: 500 taps initially