Checkweighing / Portion Control Scales

Check weighing scales, also known as portion control scales or under-over scales, are precision weighing tools designed to confirm whether a product falls within a set weight range. When an item is placed on the platform, built-in load cells measure its weight and instantly compare it against pre-programmed target limits. The result is displayed on a digital readout, and on many models, visual or audible signals let operators know whether the weight is acceptable at a glance.

These terms are often used interchangeably, as they all refer to the same core functionality. Check weighers verify that products meet a target weight. Portion control scales ensure consistent serving or packaging portions. Traffic light scales use yellow, red and green indicator lights to signal whether a weight is within tolerance. Many MWS scales can perform all three roles, depending on how they’re configured.

Traffic light scales use a simple colour-coded system: green means the weight is within the acceptable range, yellow means it is under, and red means it is over. This approach removes the need for operators to interpret numbers, making the process faster, more intuitive, and accessible across any language barrier. Many scales can also trigger buzzers or external lights, making them ideal for busy production environments where speed and accuracy both matter.

Check weighing scales are widely used in food production, meat processing, deli and catering operations, pharmaceutical manufacturing, agriculture, and chemical production. Anywhere consistent portion sizes or packaging weights are critical, whether for compliance, cost control, or quality assurance, a check weigher adds real value.

Profit margins in food manufacturing are notoriously slim, and even small inconsistencies in portion weight can add up to significant losses over time. At the same time, overfilling packages cuts directly into profit. Check weighing scales help strike the right balance, ensuring that every package is filled accurately without slowing down the line. They also support compliance with trading standards and labelling regulations.

Absolutely. Product giveaway — where items are consistently packed above target weight — is one of the most common and costly issues in manual packaging operations. By giving packers instant feedback on whether they’re within tolerance, check weighing scales make it easy to correct course in real time, reducing waste and protecting your bottom line without adding complexity to the process.

Yes. MWS offers check weighing and portion control scales built for food-safe and hygiene-critical environments. Stainless steel construction (including 304 and 316 grades) and sealed components make them suitable for washdown areas, helping you meet hygiene standards without compromising on performance or durability.

Definitely! MWS works closely with customers to configure check weighing solutions that fit their exact needs. This includes setting custom weight tolerances, selecting the right platform size and material, choosing appropriate indicator types, and specifying connectivity options such as outputs to lights, buzzers, or data systems. Whether you need a standalone unit or an integrated solution, we can help.

To maintain accuracy and compliance, check weighing scales should be cleaned regularly, visually inspected for wear or damage, and calibrated at scheduled intervals. MWS provides dedicated servicing and calibration support to keep your scales performing at their best. Get in touch to find out more about our calibration services and ongoing maintenance packages.