Traditional mechanical graders rely on rollers and physical force—they bruise delicate fruits and sort by size, not weight. Electronic weight sorting changes the game: gentle handling, ±2g accuracy, and multi-lane capacity that keeps pace with commercial harvests.
Why Electronic Weight Sorting Beats Traditional Graders
For decades, fruit packers relied on mechanical graders—machines that use rollers, cups, or belts to sort fruit by size. They work for some crops. But they have two fundamental problems:
· They bruise delicate fruit. Rolling, dropping, and friction damage thin-skinned fruits like apples, peaches, and avocados.
· They sort by size, not weight. But buyers pay by weight. A large but lightweight apple doesn't command the same price as a dense, heavy one of the same diameter.
Electronic weight sorting solves both problems. Each fruit is weighed individually with ±2g accuracy, then gently directed to the appropriate packing lane. No rolling. No friction. No guesswork.
The result: consistent weight-based grading without bruising—and without the revenue loss that comes from mis-graded fruit.
The Linear Advantage: Higher Capacity, More Grades
Fstsort's linear weight sorter is built for packers who need more than a single lane can deliver. It uses a straight conveyor belt to feed fruit to a series of weighing cups, with multiple lanes running simultaneously.
What the numbers mean for your operation:
Feature | What It Delivers |
|---|---|
25,000 pcs/h per lane | One lane handles what used to take an entire manual crew. Add more lanes as your volume grows. |
1–4 lanes | Start with one lane, add more when you need them. No need to replace the whole machine. |
7–12 weight grades | Fine enough for export specifications—serve multiple markets from a single harvest. |
20–500g range | Covers everything from small plums to large avocados. |
±2g accuracy | Every fruit goes to the right grade—no overfilling, no rejected shipments. |
The linear design isn't just about capacity. It's about flexibility. A 4-lane system processes up to 100,000 pieces per hour—enough throughput for the most demanding export operations. And because each lane operates independently, you can run different fruit varieties on different lanes at the same time.
Gentle Enough for the Most Delicate Fruits
Speed is meaningless if the fruit comes out damaged. The Fstsort linear weight sorter is designed with gentleness as the first priority:
Protection Feature | What It Prevents |
|---|---|
Soft weighing cups | Rolling and friction during weighing—fruit sits still, no surface damage |
Low-drop discharge | Hard landings after sorting—minimal fall height, no impact damage |
Food-grade PVC belts | Contamination and scratching—safe, smooth surfaces |
±2g accuracy | Mis-grading and overfilling—every fruit goes to the right grade |
The result: fruits that leave the line in the same condition they entered—no hidden bruises, no post-sorting browning, no rejected shipments.
Smart Switching, Smarter Operation
The linear weight sorter is controlled by a PLC system with a touch-screen interface. This isn‘t just about automation—it’s about operational intelligence:
· Save and recall profiles — Store settings for apples, peaches, pears, citrus, and more. Switch between crops in seconds, not hours.
· Track production data — Monitor fruit quantity and total weight per lane. Know exactly what‘s coming off the line.
· Adjust on the fly — Change grade parameters without stopping the line. No engineers required.
For packers who handle multiple crops throughout the year, this flexibility is a game-changer. One machine, multiple profiles, endless possibilities.
Beyond Sorting: A Complete Packing Line
The linear weight sorter integrates seamlessly with front-end and back-end modules to form a complete packing line:
Front-end options:
· Water flume feeding — Fruits float into the system; water acts as a natural cushion, eliminating bruising from dry dumping
· Soft-touch brushes — Ultra-soft, food-grade bristles polish without micro-scratching
· Air blowers — Remove surface moisture before grading
Back-end options:
· Automatic box filler — Precise, low-drop placement into cartons or boxes
·Packing tables — Sponge-buffered slopes; fruit rolls gently to packers
Start with the sorter. Add modules as your business grows. The system scales with you.
Explore the full specifications on our automatic weight sorting machine page →
Sort by Weight. Pack by Value.
Traditional graders measure size. Electronic weight sorters measure what buyers actually pay for—weight. And they do it gently, accurately, and at scale.