In-line Checkweighers – High-Speed Weight Verification for Production Lines
Our in-line checkweighing systems are automated weighing solutions designed to verify the weight of every product passing along a production or packaging line — at speed, without interrupting throughput. By detecting underweight and overweight products in real time and automatically rejecting non-conforming items, they protect product quality, reduce giveaway, ensure regulatory compliance, and provide the statistical data needed for continuous process improvement.
In-line checkweighers are essential in any production environment where weight accuracy directly affects compliance, profitability, or consumer safety. In food production, they ensure average weight legislation compliance and reduce costly product giveaway. In pharmaceutical manufacturing, they verify fill weights and tablet counts to meet strict regulatory requirements. In packaging and logistics, they catch missing components, incorrect quantities, and mislabelled consignments before they reach the customer. With throughput rates up to 200 products per minute and capacities from 500 g to 50 kg, our range covers the full spectrum of production line requirements.
Key Features
- High-speed throughput up to 350 products per minute for demanding production environments
- Capacities from 500 g to 50 kg for lightweight sachets through to heavy packaged goods
- Automatic reject systems with pneumatic pushers, air jets, or diverter arms for non-conforming products
- Multi-zone classification — under-weight, target, and over-weight sorting for precise quality control
- Touchscreen displays with real-time statistics, production monitoring, and recipe storage
- IP65 and IP69K protection ratings with stainless steel construction for washdown food environments
- Data logging and SPC connectivity for traceability, audit trails, and statistical process control
- Average weight legislation compliance support for UK and EU packaged goods regulations
Common Applications
- Food production — high-speed weight checking for packaged foods, ready meals, and portion-controlled products
- Pharmaceutical manufacturing — fill weight and tablet count verification for GMP and regulatory compliance
- Packaging lines — automated checkweighing for quality control and missing component detection
- Meat and poultry processing — portion control and weight verification for packaged meat products
- Bakery and confectionery — high-speed in-line checkweighing for baked goods and wrapped confectionery
- Logistics and distribution — parcel and package weight verification to prevent carrier surcharges
All in-line checkweighing systems are sourced from leading manufacturers and are available with full validation documentation and traceable calibration support on request. Browse below to find the right throughput, capacity, and reject system for your production line.
Frequently Asked Questions
What is the difference between a checkweigher and a standard scale?
A standard scale requires an operator to manually place and read each item. An in-line checkweigher is a fully automated system integrated into a production or conveyor line — it weighs every product in motion, classifies it as under, target, or over weight, and automatically rejects non-conforming items without stopping the line. Throughput rates of 50–200 products per minute are typical.
What reject mechanisms are available?
Common reject mechanisms include pneumatic pushers (for robust packaged goods), air jet blowers (for lightweight or fragile items), and diverter arms or belt deflectors (for larger products). The right mechanism depends on your product type, line speed, and packaging format — contact our team for guidance on the best option for your application.
Can checkweighers help with average weight legislation compliance?
Yes. In-line checkweighers are a primary tool for demonstrating compliance with UK and EU average weight legislation (the ‘e’ mark rules) for pre-packaged goods. They provide the statistical data — mean weight, standard deviation, and T1/T2 error rates — required to demonstrate compliance during inspections by Trading Standards or other regulatory bodies.
Are checkweighers suitable for washdown environments?
Yes. Our IP65 and IP69K-rated models feature stainless steel construction and sealed electronics designed for regular washdown with high-pressure water jets and cleaning chemicals. These are standard requirements for food production, meat processing, and pharmaceutical environments. Always confirm the IP rating and material specification for your cleaning regime.
Can checkweigher data be exported to my production or quality systems?
Yes. Most models feature Ethernet, USB, or OPC-UA connectivity for integration with MES, ERP, SCADA, and quality management systems. Data outputs typically include individual weight records, batch statistics, SPC charts, and reject counts — supporting full production traceability and audit readiness. Contact us for integration advice specific to your systems.
