Measure product variation
Use normal and difficult batches. Record bulk density where relevant, piece-size variation, oil, dust, static and how the product settles in a container.
Direct answer
A multihead weigher measures product by weight; a volumetric cup filler meters a fixed volume.
A multihead weigher is normally the stronger comparison when weight control, product value or density variation makes individual pack weight important. A volumetric cup filler may suit stable, free-flowing products where a simple fixed-volume dose is commercially acceptable. The correct route depends on the product, target, density variation, required output, pack opening, cleaning and the acceptance method.
| Decision factor | Multihead weigher | Volumetric cup filler |
|---|---|---|
| Measurement principle | Combines independently weighed portions to approach a target weight | Fills and discharges a defined cup volume |
| Effect of density change | Weight is measured directly, although feeding and portion creation still affect performance | The same cup volume can produce a different weight when bulk density or product level changes |
| Typical starting products | Free-flowing pieces, granules, snacks, beans, pellets and small components | Consistent free-flowing products that fill a cup repeatably |
| Adjustment | Target, feeder settings, hopper population and combination settings | Cup volume, fill level, product presentation and mechanical settings |
| Pack integration | Timing hopper or chute into VFFS, pouches, containers or trays | Direct discharge into a bagger, pouch or container route |
| Trial evidence | Ordered pack weights, giveaway, portion distribution, damage and sustainable output | Weight spread at fixed cup volume, density variation, fill consistency and product loss |
Selection sequence
Compare both technologies with the same production brief.
Define the weight objective
State whether the project is governed by a target weight, a minimum quantity, an average system or a simple portion-volume requirement. Do not assume a volumetric dose is equivalent to a controlled weight.
Use the real pack
Provide bag, pouch, pot or tray dimensions. Opening size, drop height, settling and seal-zone protection can affect either route.
Compare sustained operation
Include refill, product level, recipe change, cleaning, waiting time and downstream faults rather than comparing one isolated dose.
Trade-offs
Choose the simplest route that can prove the required finished-pack result.
When can a volumetric cup filler be enough?
A cup filler may be appropriate when product density is stable, the product fills the cup consistently, the target can tolerate the resulting weight spread and the project values mechanical simplicity. The decision should be checked across real batches.
When is multihead weighing worth comparing?
Multihead weighing becomes more relevant when weight accuracy, product giveaway, multiple target weights, high product value or irregular piece size makes a fixed-volume dose less predictable.
When should linear or auger filling also be considered?
Linear weighing may suit lower-output free-flowing products. Auger filling is often a better comparison for fine, cohesive or aerated powders. The product behaviour should determine the trial route.
Buyer questions
Questions buyers ask when comparing weight and volume.
Which is more accurate: a multihead weigher or cup filler?
There is no responsible universal figure. A multihead weigher measures weight directly, while a cup filler depends on a repeatable relationship between cup volume and product density. Compare finished-pack data from the real product and pack.
Can a volumetric cup filler feed a VFFS machine?
Yes, where the filler and bagger are mechanically and electrically integrated. The pack opening, dose timing, product drop and film-seal area still need to be validated.
Why does bulk density matter to volumetric filling?
A fixed cup meters a volume, not a weight. If the product becomes more compact, aerated or otherwise changes density, the weight delivered by the same cup volume can change.
Does a multihead weigher remove every density problem?
No. It measures weight, but density and product condition still affect feeding, hopper fill, settling, discharge and sustainable output. The advantage is that the controller selects from measured portions rather than assuming a fixed volume always has the same weight.
Which is easier to clean?
Cleaning depends on product retention, access, the number and shape of contact parts, surface finish and the site's cleaning method. Compare the actual contact path and changeover procedure rather than machine size alone.
What sample is needed for a fair comparison?
Use enough normal production product to include refill and density variation. Supply the real target weights, pack samples, required output and acceptance method so both technologies are assessed consistently.
Technology review
Compare weight-based and volume-based dosing with the same product evidence.
Send the product, pack, target and current fill variation to Lancing.
Request a dosing reviewRelated guidance