Particle & solid-state
Tap Density Tester
Taps a graduated cylinder of powder a set number of times from a fixed height so the bed packs down. The starting and final volumes give bulk density, tapped density, Carr's index and Hausner ratio.
- Pharmaceutical
- Nutraceutical
- Chemicals
- Food & beverage
- Powder metallurgy
TROUBLESHOOTING
Common problems, causes and fixes
Poor repeatability between duplicates
Likely causes
- • Different filling technique
- • Sample not sieved or not representative
- • Uneven powder surface
What to do
- • Standardise pouring; train analysts
- • Sieve and mix before sampling
- • Read at the mean level of the surface
Volume keeps decreasing after many taps
Likely causes
- • Very cohesive or fragile powder
- • Particles breaking under tapping
What to do
- • Continue tapping in increments as the method allows
- • Report the number of taps used
Tap count wrong
Likely causes
- • Faulty counter or sensor
- • Belt slipping
What to do
- • Verify by manual count; service the counter
- • Replace the belt
Drop height out of tolerance
Likely causes
- • Worn cam or anvil
- • Loose holder
What to do
- • Replace worn parts and recalibrate
- • Tighten fixings
In LimsPulse · Calibration Management
Keep every Tap density tester in control: usage logs, calibration and maintenance schedules, and automatic blocking of overdue instruments.