Checkweighing
Best suited where total mass or net-content control is the primary requirement and tare variation is understood.
Fill-level inspection ›
Weight-based fill verification
Checkweigher Fill Level Control UK
In-line pack-weight verification for underfill and overfill control, with automatic rejection, production trends and optional feedback to compatible filling equipment.
Direct answer
When is a checkweigher the right fill-control method?
Use a checkweigher when the required evidence is total pack mass rather than the visible height of the contents.
Every pack is weighed in motion and compared with the limits for the active recipe. Underweight and overweight packs are tracked to an automatic reject device, while results can be grouped into trends that show gradual filling-process drift.
Level, volume and weight
Measure the quantity that matters to the specification.
Fill height and fill weight are related, but they are not interchangeable. Pack geometry, product density, foam, settling and empty-container weight variation can change the relationship.
Machine vision
Measures a visible fill boundary and can distinguish level, foam band or presentation features in transparent packs.
X-ray inspection
Assesses hidden contents or a fill region through cans, cartons, coloured glass and other opaque packaging.
Application data
Account for product and pack variation.
A meaningful weight limit must separate genuine fill faults from normal variation in the container, closure, label and product presentation.
- Nominal gross and net weight, permitted limits and target production mean
- Empty pack, closure, label and decoration weight variation
- Product density, aeration, temperature, movement and settling behaviour
- Line speed, conveyor vibration, pack spacing and transfer stability
- Product recipes, changeover control and verification samples
- Reject confirmation, locked collection, alarms and data interfaces
From result to process control
See drift before too many packs fail.
Individual pack rejection protects output. Aggregated results help production teams understand whether the process mean is moving towards a limit.
Measure every pack
Compare each stable in-motion weight with the selected product and format recipe.
Trend the process
Monitor mean, spread, reject rate and recurring changes by product, batch, lane or time period.
Control the response
Use warnings, line stops or carefully governed filler feedback where the process and interfaces support it.
Practical answers
Questions about weight-based fill control.
Performance is application-specific and must be established against the real product, packaging and production environment.
Ask an engineerDoes a checkweigher measure fill level?
A checkweigher measures total pack weight, not the physical height of the contents. It can detect underfill or overfill when pack-weight variation and the required limits allow a reliable separation.
Can a checkweigher inspect opaque packs?
Yes. Weight measurement does not require a view through the pack, so it can be used with cans, cartons, coloured containers, pouches and other opaque formats where total mass is suitable evidence.
Can checkweigher data adjust a filler automatically?
Potentially. Rolling results can support controlled feedback to compatible filling equipment, but the response must account for process delay, normal variation and which filling head or lane produced each pack.
What if empty containers vary in weight?
Tare variation reduces the certainty with which gross weight represents product quantity. Sample data can show whether fixed limits are adequate or whether another measurement method should be combined with weighing.
Talk to Oxford Vision Systems