Dynamic checkweighers are integrated into production to automatically measure the weight of products. For small, lightweight pharmaceutical products such as vials, blister packs and small cartons, special handling options such as timing screws and side-grips are typically used to help keep the product stable, therefore achieving a more accurate weight measurement.

The checkweigher includes an infeed conveyor that moves products onto a load cell, which dynamically weighs each product in motion. After weighing, products move to an outfeed conveyor with a sorting or rejection device designed to address any packaging challenges of the individual product. If a product's weight falls outside a set tolerance range, the system automatically rejects it from the line, allowing only correctly weighted products to continue.

This process helps maintain quality control in pharmaceutical production by quickly and accurately identifying products that don’t meet weight standards, all without stopping the production line.

Dynamic checkweighers can be placed at various points on a production line, depending on the product and process flow. 

For solid-dose production, they are often positioned after filling and sealing to check tablet bottles, blister packs, or cartons for completeness and leaflet inclusion. The system confirms that the correct dosage has been delivered and any deviation triggers automatic feedback to the filler.

In liquid-dose manufacturing, checkweighers perform fill-level control immediately after the filling station. By monitoring every vial, ampoule, or syringe, the smart fill level adjustment feature in METTLER TOLEDO dynamic checkweighers detects deviations early. It automatically sends feedback to the fillers to adjust their settings to reduce the risk of errors.

At the final packaging stage, checkweighers confirm that all required components are present, such as inserts, syringes, or caps. This end-of-line completeness check helps to provide a safeguard against human error and supports documentation for batch release. By layering these systems, manufacturers gain full visibility of performance and help keep every product compliant and accurate.