Learn how to choose a tomato sorting machine for cherry tomatoes, grape tomatoes, Roma tomatoes, and round tomatoes. Compare roller graders, drum graders, weight sorters, and AI optical sorters, with optional washing, drying, inspection, and packing modules.
1. What Is a Tomato Sorting Machine?
A tomato sorting machine separates tomatoes by size, weight, color, quality, or surface defects before packing. Because tomatoes vary widely in shape — from tiny cherry tomatoes to large flattened rounds — the right machine depends entirely on whether your crop is cherry tomato, grape tomato, Roma tomato, or round tomato. Choosing the wrong sizer means inconsistent grades, rejected shipments, and wasted profit.
2. Why Tomato Shape Determines the Right Grading Method
Tomatoes are not one-size-fits-all. Each variety has a distinct shape, and that shape dictates which grading mechanism works best:
· Cherry tomato / grape tomato — small, round or oval. Best suited for roller graders that sort by diameter with gentle handling.
· Roma tomato — oval / plum-shaped. Also typically best processed on a roller grader by diameter.
· Round tomato — the common large tomato, slightly flattened in shape. For diameter sorting, drum graders are the preferred solution.
· If your customer grades by weight (e.g., retail pack specifications), choose an electronic weight sorter.
· If your customer needs to sort by color, ripeness, external blemishes, or defects for premium export markets, choose an AI optical sorter.
Tomato Type
Typical Shape
Primary Sorting Target
Recommended Machine
Cherry Tomato
Small, round
Diameter / size
Roller grader
Grape Tomato
Small, oval
Diameter / size
Roller grader
Roma Tomato
Oval / plum-shaped
Diameter / size
Roller grader
Round Tomato (standard large)
Flattened round
Diameter
Drum grader
Round Tomato (weight-sensitive)
Flattened round
Single-fruit weight
Electronic weight sorter
All tomato types (export / premium grade)
Any suitable shape
Color, ripeness, surface defects, rot, mechanical damage
AI optical sorter
3. Cherry, Grape, and Roma Tomatoes: Roller Grader for Diameter Sorting
For small round or oval tomatoes — cherry, grape, and Roma varieties — the roller grader is the industry standard. These machines sort by diameter using adjustable roller gaps, delivering consistent size grades at high throughput.
What a typical roller grader line includes:
· Hopper with elevator for controlled infeed
· Water pipe for pre-washing (optional)
· Roller inspection table for manual sorting
· Size grader with adjustable diameter settings
· Manual sorting belt for final check
Key specifications:
· Grading standard: Diameter (fully adjustable)
· Speed control: Frequency converter for variable speed
· Applications: Cherry tomato, grape tomato, Roma tomato, tamarillo, and similar small round/oval fruits
· Optional modules: Washing section, drying section, box filling & weighing system
Why choose a roller grader for these varieties?
· Gentle handling — critical for delicate cherry and grape tomatoes
· Precise diameter sorting — meets retail pack specifications
· Each function (washing, drying, grading, packing) can be used independently or combined into a complete line
· Variable speed matches your packing capacity
📌 Related product: Cherry Tomato Grading Machine — view full specifications and request a quote.
4. Round Tomatoes: Drum Grader, Weight Sorter, or AI Optical Sorter?
For standard round tomatoes (the flattened-round variety commonly grown for fresh market and processing), you have three technology options — each serving a different purpose.
Option 1 — Drum Grader (Diameter Sorting)
The drum grader is the most affordable tomato sorter, designed for packers who need reliable diameter sorting without complex automation.
What it includes:
· Automatic feeding hopper
· Roller elevator & inspection table
· Drum size sorting machine
Typical parameters:
Parameter
Typical Reference Range
Capacity
5–10 t/h (customizable)
Number of grades
3–6 (customizable)
Sorting range (diameter)
15mm – 120mm
Voltage
220V / 380V / custom
Material (fruit contact)
Stainless steel
Frame material
Carbon steel / stainless steel
Best for: Basic size sorting, budget-friendly operations, smaller packhouses
Option 2 — Electronic Weight Sorter (Higher Accuracy)
For customers who need weight-based grading rather than diameter, Fstsort offers an electronic weight sorter with ±2g accuracy — highly flexible and configurable to your capacity, packing requirements, and budget.
Typical parameters:
Parameter | Typical Reference Range |
|---|---|
Accuracy | ±2g |
Number of grades | 6–12 exits |
Capacity (per lane) | 25,000 pcs/h/lane |
Number of lanes | 1, 2, 4, or 6 lanes (configurable) |
Weight range | 50g – 500g (adjustable) |
Touch screen control | Yes — with data recording |
Fruit contact material | Stainless steel / food-grade plastic |
Best for: Uniform weight packing, export orders, integration with automatic packing lines.
Option 3 — AI Optical Sorter (Premium Quality)
The optical sorter uses high-speed cameras and advanced computer vision to sort by diameter, color, shape, and external defects in a single pass.
Detects:
· Surface blemishes and bruises
· Discoloration and unusual shapes
· External defects that human eyes might miss
Technology: High-speed cameras + sorting mechanism
Best for: Premium export markets, defect removal, high-quality packing lines.
5. Tomato Sorting Technology Comparison
Feature | Drum Grader | Weight Sorter | Optical Sorter |
|---|---|---|---|
Sorting principle | Diameter | Weight (±2g) | Color, shape, defects |
Investment level | Low | Medium | High |
Automatic packing possible? | ❌ No | ✅ Yes | ✅ Yes |
Best for | Basic sorting, budget | Uniform weight, export | Premium quality, defect removal |
Upstream integration | Washing + drying | Washing + drying | Washing + drying |
Downstream packing | Simple table only | Table or auto box fill | Table or auto box fill |
📌 Related product: Tomato Processing Machines — explore all three sorting technologies and find the right configuration for your operation.
6. Installed Tomato Sorting Projects by Market
Fstsort tomato sorting and grading systems have been supplied to different markets for different crop types and requirements:
· Cherry tomato sorting: Australia, Jordan, New Zealand, and China
· Large tomato sorting: Saudi Arabia, Qatar, and Turkey
· Tomato optical sorting line: Bulgaria
· Multi-vegetable line including tomatoes: Qatar
7. Optional Modules for a Complete Tomato Sorting Line
A tomato sorting machine can work as a standalone grader or as part of a complete line. Depending on the factory layout and automation goals, the line can include:
Section | Equipment | Function |
|---|---|---|
Infeed | Bin tipper | Dump tomatoes from bins into the line |
Washing | Bubble washing tank | Remove dirt and field debris |
Drying | Air dryers | Remove surface moisture before grading |
Inspection | Manual inspection table | Remove visibly damaged fruit |
Sorting | Grader (roller/drum/weight/optical) | Primary size/weight/quality sorting |
Packing | Manual packing tables / automatic weighing & box filling | Final pack for market |
Packing options can include manual packing tables, automatic weighing and box filling systems, or direct discharge into crates. These modules should be selected after the sorting method is confirmed — the grader is the heart of the line, and everything else supports it.
8. Buying Checklist: Eight Questions to Ask Before You Order
Question | Why It Matters |
|---|---|
What tomato varieties do you process? | Cherry, grape, Roma, and round tomatoes each require different grading technology |
What is your target throughput (kg/h or t/h)? | Determines machine size, number of lanes, and configuration |
Do you grade by diameter, weight, or quality (color/defects)? | Defines which sorter type — or combination — you need |
How many output grades do you need? | Affects number of exits on drum grader (3–6) or weight sorter (6–12) |
Do you need washing and drying upstream of the grader? | Complete line vs. standalone sizer |
Do you need automatic packing downstream? | Manual tables vs. automatic box filling & weighing |
What are your voltage and power specifications? | 220V / 380V / custom |
What is your budget range? | Drum grader (low), weight sorter (medium), optical sorter (high) |
Still Not Sure Which Tomato Sorter Fits Your Crop?
That’s exactly what we’re here for. Every tomato operation is different — different varieties, different target markets, different budgets.
Tell us about your tomatoes — variety, daily volume, target grades, and packing requirements — and we’ll send you a customized equipment proposal within 48 hours.
All Fstsort machines are customizable — capacity, number of grades, lanes, materials, and optional modules. We design to your needs, not the other way around.
If you want to know more about tomato sorting machines, pleae visit our product page of Tomato Processing Machines