Shrimp Graders and Sorters — Roller, Optical and Laser Grading
Grading turns harvested shrimp into sellable count sizes. Accuracy decides how much product lands in the grade the buyer pays for.
Short answer: Shrimp graders sort shrimp into count sizes by mechanical rollers or optical and 3D laser measurement. Published capacities run from about 400–1,500 kg/h for roller graders to around 4,000–5,000 kg/h for a 2025 optical sorter. Specify count ranges, grades and product forms.
What shrimp graders do
- Roller graders separate shrimp by thickness between diverging rollers into several grades.
- Optical and 3D laser sorters measure each shrimp and eject it into the right bin; newer units add computer-vision grading.
- Peeling lines (often with steam cooking) automate peeled and cooked products.
- Grades follow trade conventions: head-on often counted per kilogram, most other forms per pound (e.g. 16/20, 21/25, U = under).
Where it applies
- Shrimp processing and packing plants
- Large farms grading at harvest
Technology maturity: Roller graders: established. Laser/optical AI grading: commercial and emerging (2025).
Variants compared
| Variant | Best fit |
|---|---|
| Roller graders | Robust mechanical grading. |
| Optical / laser sorters | Precise per-piece grading at high capacity. |
| Peeling and cooking lines | Peeled and cooked products. |
Typical specifications
| Parameter | Typical range | What it means for you |
|---|---|---|
| Roller grader capacity | ≈400–1,500 kg/h, up to 6 grades (manufacturer-stated) | Capacity depends on shrimp size, condition and feeding. |
| Laser / optical sorter | 6 imaging lanes; a 2025 model ≈4,000–5,000 kg/h (manufacturer-stated) | Higher accuracy and data per piece; needs stable feeding and cleaning. |
| Count conventions | Pieces per kg (often head-on) or per lb (most other forms) | State the basis in contracts and in the RFQ. |
Advantages
- Sells product in the right count grade
- Higher throughput than manual grading
- Data on size distribution
Limitations
- Accuracy varies by size range
- Higher-tech systems need skilled maintenance
Maintenance
- Clean rollers, lanes and cameras
- Calibrate grades against hand counts
- Replace wear parts
Risks to manage
- Misgrading reduces value
- Bottlenecks when capacity does not match freezing
Compliance points to check
- Food-contact materials and hygiene standards
- Count and net-weight declarations
Compliance points are prompts for your own review. Producers, suppliers and buyers remain responsible for the rules that apply to them; FishMatch does not certify equipment or guarantee compliance.
Sizing guidance
Size grading on peak harvest per hour, product forms and the number of count grades your buyers want.
| Project scale | Typical grading set-up | Design notes |
|---|---|---|
| Farm or small plant | Roller grader | Simple and robust; check grade accuracy at your sizes. |
| Export plant | Optical/laser sorter + rollers | Accurate grading protects margins on premium counts. |
| Value-added lines | Grading + peeling + cooking | Integrate with freezing and glazing capacity. |
RFQ: product forms, count ranges and number of grades, peak kg/h, count basis (kg or lb), hygiene standard, data output and integration with freezing and packing.
How to choose
- Accuracy on your sizes
Ask for test results on your species and count range; misgrading moves product into lower-value grades.
- Integration
Feeding, grading, freezing and packing must run at matched capacities.
- Hygiene
Easy-clean design and stainless construction for food-safety audits.
What drives the price
- Technology
Optical and laser sorting costs more than roller grading.
- Capacity and grades
Throughput, lanes and number of bins.
- Integration
Conveyors, weighing, data systems and peeling lines.
No sourced price benchmark is published for this product type. Quotations depend on capacity, materials, controls, redundancy, installation scope and delivery terms — FishMatch requests comparable quotations against your written specification instead of quoting a list price.
Common specification mistakes
- Not stating whether counts are per kg or per lb.
- Grading capacity that does not match freezing or peeling capacity.
- Buying on throughput alone without grade-accuracy tests.
Components that work with it
- Seafood freezers
Freeze graded product
Shrimp graders — buyer questions
Get quotes for shrimp graders
Send your duty, site conditions and target capacity once. We turn it into a comparable specification, send a confidential RFQ to producers and suppliers that may fit the project, and coordinate their replies on the same scope. Free for buyers; qualifying projects start at USD 250,000. FishMatch does not manufacture equipment, and buyers do not contact suppliers directly.
Related pages
Sources and review
- The European market potential for pacific white shrimp — CBI (Netherlands Ministry of Foreign Affairs), 2021-03
Ranges marked "manufacturer-stated" come from public manufacturer documentation reviewed by FishMatch; they are examples, not guarantees, and supplier names are not shown. Last reviewed 2026-10-24.