Vitamins, supplements and many medicines are sold in bottles of 30, 60 or 100 tablets or capsules. Counting them accurately into each bottle, then sealing and labelling the bottle, is the job of a tablet counting line. For nutraceutical and pharmaceutical companies, especially those selling online or exporting, a reliable counting line protects margins and builds customer trust.
Why Accurate Counting Matters
A bottle labelled 60 capsules must contain 60. Short counts lead to complaints and regulatory issues. Over-counts give away product. Manual counting with trays is slow and error-prone at volume. Automatic counters solve both problems.
How Electronic Counters Work
Electronic counters feed tablets or capsules along vibrating channels. As each product falls through a sensor at the end of a channel, it is counted. When the target count is reached, a gate closes and the counted products drop into the bottle. Multiple channels run in parallel to increase speed.
Handling Different Products
Counters handle round tablets, oval tablets, capsules and softgels. Vibration and channel design must suit the product shape. Coated tablets and softgels need gentle handling, while dusty uncoated tablets may require dust extraction to keep sensors clean.
A Complete Counting Line
A typical line includes:
- Bottle unscrambler to orient and feed empty bottles
- Electronic tablet counter
- Desiccant inserter, if the product needs moisture protection
- Cotton inserter, used by some brands to prevent rattling
- Capping machine
- Induction sealer for tamper evidence
- Labelling machine with batch coding
- Optional checkweigher to confirm the correct count by weight
Desiccants and Moisture Protection
Many products are sensitive to moisture. Desiccant canisters or sachets are inserted into bottles before capping. Automatic inserters ensure every bottle receives one, which is easy to forget with manual processes.
Checkweighing as a Safety Net
A checkweigher after capping can detect bottles with missing tablets or missing desiccants by comparing bottle weight to a target. This adds confidence, especially for high-value products.
Cleaning and Changeover
Products must not mix. Counters should be easy to clean between products, with channels and hoppers that can be removed quickly. Dust extraction keeps sensors accurate.
Documentation
For regulated products, documentation such as qualification protocols and calibration records supports compliance.
Validating Count Accuracy
Before putting a new counter into service, run validation trials. Count a large number of bottles automatically, then verify a sample by hand. Repeat with every product shape you plan to run. Note how the counter handles broken tablets and fragments, because dust and chips can be counted as whole tablets on some systems. Modern counters can detect and reject fragments, but settings need to be tuned for each product. Recording these validation results gives you confidence and supports audits.
Choosing the Right Number of Channels
More channels mean higher speed, but they also mean more parts to clean and more space. For a company with many products in small batches, a counter with fewer channels and fast changeover may be more practical than a high-speed machine that spends much of its time being cleaned. Match the counter to your actual batch sizes and product mix rather than the highest speed on offer.
Scaling Up
Smaller companies may begin with a semi-automatic counter where operators place bottles manually. As volumes grow, automatic lines with unscramblers and integrated capping increase output and consistency.
Hilden supplies tablet counting machines and complete bottle lines for nutraceutical and pharmaceutical products, helping companies move from manual counting to accurate, automated packing.
