How to Choose a Tablet & Capsule Counting Machine? 4 Key Factors to Consider

Counting machines are widely used in pharmaceutical, nutraceutical, food, and other industries to count products and fill a set quantity into bottles.

At first glance, counting seems like a simple process. In actual production, however, the performance of a counting machine can be affected by many factors, including the product itself, bottle size, production speed, and the way the machine connects with the rest of the packaging line.

That is why choosing a counting machine is not simply about looking at the counting accuracy or maximum speed.

Before making a decision, there are four key factors worth looking at.

01. Start with the Product, Not Just the Counting Speed

Different products behave differently during feeding, counting, and filling.

Hard capsules, regular tablets, and other products with consistent shapes and good flowability are generally easier to handle with a standard counting system.

Softgels, coated tablets, and irregular-shaped gummies can be more challenging. Some products may be slightly sticky or elastic, which can cause them to stick together or overlap during feeding. In these cases, the feeding and separating systems need to be more stable.

Small products such as pellets and mini pills can present another challenge. Because they are small and lightweight, some products may be affected by static electricity or become trapped in the feeding system during high-speed operation.

Before choosing a counting machine, it is useful to confirm:

• What type of product are you counting?
• What are the product size and weight?
• Do the products tend to stick together or overlap?
• Are they affected by static electricity?
• How many pieces need to go into each bottle?
• What production speed do you need?

The characteristics of the product are the starting point for choosing the right counting machine.

02. Accurate Counting Is Not Enough — The Machine Also Needs to Fill Bottles Reliably

The final goal of a counting machine is not simply to count the products. It needs to deliver the correct number of products into each bottle, consistently and without disrupting the packaging process.

This is where the bottle becomes important.

For example, a bottle with a small neck opening may make product discharge more difficult. With a deep bottle, products may bounce after entering the bottle, affecting the stability of the filling process.

Irregular-shaped bottles can also require more precise positioning because the bottle opening and body structure are different from those of standard round bottles.

Static electricity can be another issue, especially when small products are filled into plastic bottles. Products may stick to the bottle wall instead of reaching the bottom properly.

For applications involving small products, narrow-neck bottles, deep bottles, or irregular-shaped containers, it is therefore not enough to test the counting accuracy alone.

The feeding, separation, discharge channels, and bottle positioning system should also be tested.

This is why it is always better to test the machine with the actual product and actual bottle whenever possible.

A test using different products or bottles may not accurately reflect how the machine will perform in real production.

03. Don't Just Ask About Accuracy — Check the Test Conditions

One of the most common questions when buying a counting machine is:

“What is the counting accuracy?”

Accuracy is important, but a number such as “99.9%” does not tell the whole story unless the testing conditions are clear.

The same machine may perform differently depending on the product, bottle, production speed, and operating conditions.

When comparing counting machines, it is worth asking about the following.

Production Speed

A machine running at a lower speed may achieve different results from the same machine running continuously at high speed.

When comparing different machines, make sure the stated accuracy was achieved at a production speed that is relevant to your application.

Number of Bottles Tested

Testing a few dozen bottles is different from running several thousand bottles continuously.

If the machine will be used for long production runs, continuous testing can provide a better indication of its stability.

Final Reject Rate

Counting accuracy is only part of the picture. What really matters is how many bottles eventually fail to meet the required count.

A more useful question for a machine supplier would be:

Under the specified product, bottle, and production speed, how many bottles were tested, and how many bottles ended up with an incorrect count?

This gives you a much clearer basis for comparing different machines.

04. Look Beyond Machine Specifications

Counting accuracy and production speed are important, but they are not the only things that matter in daily production.

Changeover Time

If your factory produces multiple products or package sizes, changeover efficiency can have a direct impact on productivity.

Consider how many parts need to be removed or adjusted when changing products, how the machine settings are changed, and how long it normally takes to get the machine running again.

A machine that is fast but difficult to change over may not deliver the expected efficiency in a multi-product production environment.

Cleaning and Hygienic Design

For pharmaceutical and nutraceutical products, cleaning is another important consideration.

Check whether product-contact parts can be removed easily, whether there are difficult-to-clean areas inside the machine, and how convenient it is to clean the equipment between different batches.

Good access for cleaning can make a noticeable difference to daily maintenance and batch changeover.

Real Production Experience

A machine may perform well during a showroom demonstration, but actual production conditions can be quite different.

Product consistency, bottle tolerances, temperature, humidity, and continuous operating time can all affect machine performance.

If possible, ask the supplier for examples of similar applications using comparable products, bottle sizes, and production requirements.

Real production experience can often tell you more than a specification sheet alone.

How to Choose the Right Counting Machine?

There is no single counting machine that is suitable for every product and application.

A machine used for hard capsules may require a different configuration from one handling small pellets or softgels. Even with the same product, changing from a standard round bottle to a narrow-neck or irregular-shaped bottle may require adjustments to the feeding and filling system.

Before contacting a counting machine supplier, it helps to prepare the following information:

• Product name and type
• Product size and weight
• Product photos
• Whether the product tends to stick, overlap, or generate static
• Bottle dimensions and neck diameter
• Number of pieces per bottle
• Required production speed
• Number of product specifications
• Expected production volume
• Existing packaging line configuration

Whenever possible, providing the actual product and packaging bottles for a machine test is one of the most practical ways to determine whether the equipment is suitable for your production.

Nantong Hengli Packaging: Counting and Automated Bottle Filling Solutions

Nantong Hengli Packaging Technology Co., Ltd. was established in 2004 and specializes in packaging equipment and automated packaging solutions.

                                       

The company's solutions cover multiple packaging processes, including bottle filling, bagging, cartoning, and case packing.

For counting and bottle filling applications, Hengli Packaging can configure equipment according to the product characteristics, bottle specifications, filling quantity, and required production speed.

The company also supports machine testing based on customers' actual products and packaging containers, helping customers evaluate equipment suitability before making a purchase.

Hengli Packaging's equipment has been exported to multiple countries and regions, with technical support and relevant certifications available according to different market requirements.

If you are looking for a tablet and capsule counting machine, automatic counting machine, or counting and bottle filling solution, you can send our engineers your product photos, dimensions, bottle specifications, and production requirements for an initial evaluation.

If required, you can also provide actual products and bottles for machine testing to verify the equipment configuration under real production conditions.

Nantong Hengli Packaging Technology Co., Ltd.

Website: hl-pack.cn

Tel: +86 138 1470 8168