Linear Combination Weigher
A linear combination weigher is a high-accuracy dosing system that uses multiple linear weighing channels to calculate and discharge the best weight combination for each pack. It’s a practical option when you need better accuracy and lower giveaway than a basic linear weigher—especially for products that don’t flow smoothly—but you don’t need the high-speed complexity of a full multihead system.
This weigher type is mainly used for sticky, wet, or frozen products that can bridge, clump, or smear in standard hopper-based weighing. Typical products include meat portions, frozen meat, fish fillet, seafood pieces, and whole vegetables such as carrots and peppers. These products often require controlled feeding and clean product transfer to keep weights consistent and reduce line stoppages.
Smart Weigh offers two main designs of linear combination weigher machines to match different product behaviors:
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Belt Type Linear Combination Weigher
Best for sticky or frozen items that need gentle, controlled movement and stable separation. Belt lanes help reduce sticking and improve feeding consistency, which supports accurate combination dosing and cleaner discharge into the packer. -
Hopper Type Linear Combination Weigher
Suitable when the product can still drop reliably but you want combination accuracy with a compact layout. It’s often selected for less sticky frozen items or products that have acceptable flow but still benefit from combination control.
Both belt type and hopper type systems are designed for stable dosing, consistent portion control, and smooth integration into complete packing lines.
Integration options: Smart Weigh linear combination weighers can work with VFFS bagging machines, pouch packing machines, tray packing machines, and jar/container filling lines, depending on your packaging format and discharge method.
Operational benefits: By improving combination accuracy on difficult-to-handle products, linear combination weighers help reduce giveaway, stabilize pack weights, and improve overall line efficiency—especially in frozen and fresh protein/vegetable applications where downtime and product waste are costly.
If you share your product (fresh/frozen), target weight, and pack type, Smart Weigh can recommend the right structure (belt type or hopper type) and provide a complete linear combination weigher packing line solution.
Why Choose Smart Weigh’s LINEAR COMBINATION Weigher?
If your current line suffers from overfill, unstable weights, or inconsistent pack quality when weighing your sticky products or whole vegetables, a linear combination weigher helps you tighten control without overcomplicating the system. By using multiple channels and combination logic, it improves target accuracy and reduces product giveaway—especially important for higher-value products where small overfill adds up quickly.
Smart Weigh designs linear combination weighers for real factory operation: reliable feeding control, repeatable results across long runs, and straightforward cleaning and maintenance. Belt type and hopper type configurations allow you to match the machine to your product behavior, space, and speed targets, rather than forcing a one-size-fits-all approach.
BELT TYPE vs HOPPER TYPE LINEAR COMBINATION WEIGHER
A belt type linear combination weigher uses multiple belt lanes to transport product to the weighing and discharge area. It is often preferred for products that need gentler handling or smoother flow control, and for applications where feeding stability is the key to accurate dosing.
A hopper type linear combination weigher uses multiple weighing hoppers to build combinations and discharge the selected set into the packaging machine. This structure is widely used for free-flowing granules and small-piece products, offering stable weighing cycles and compact integration with baggers and pouch packers.
How Does LINEAR COMBINATION Weigher Work?
The machine divides product into multiple independent channels, weighs them simultaneously, and then the controller selects the best combination that meets the target weight with minimal deviation. Once the combination is confirmed, those channels discharge together into the packaging machine. This “combine-and-drop” approach is what helps reduce overfill compared with single-dose linear weighing, while keeping operation simpler than a full multihead weigher.
WHAT PACKING MACHINES CAN WORK WITH A LINEAR COMBINATION WEIGHER?
A Smart Weigh linear combination weigher can be integrated with multiple packaging formats, depending on your bag or container type and production flow. It commonly works with a VFFS (vertical form fill seal) bagging machine for pillow bags and gusset bags, and with a pouch packing machine for premade pouches such as doypack or zipper pouches.
It can also be connected to jar filling packing machines (jar/bottle/can lines) using a guided chute or funnel with conveyor synchronization, and to tray packing machines for tray filling prior to sealing, including lines that require consistent portioning for retail presentation.
LINEAR COMBINATION Weigher – Key Selection Factors
When selecting a linear combination weigher, focus on product behavior first. This type of weigher is mainly used for sticky or frozen products that are difficult to handle with standard multihead hoppers—especially products like meat, fish fillet, and whole vegetables.
Product Type – sticky / wet / frozen / whole pieces
Type selection – belt type for better handling of sticky/frozen; hopper type for more stable dropping products
Target weight & tolerance – affects giveaway and spec compliance
Required speed – focus on stable output for difficult products
Cleaning & hygiene – fast washdown / easy disassembly for meat & seafood lines
Integration – works with VFFS, pouch packing, tray packing, and jar/container filling lines
Looking for a practical weighing pa;cking solution for your production line?
Our engineering team is ready to help you choose or customize the right linear weigher based on your product, output, and packaging requirements.
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