Custom grader

Grading Solutions

The MARELEC Grading Solutions use state-of-the-art weighing technology for creating highly advanced accurate and fast graders. MARELEC has many years of experience and offers grading solutions that specifically suit the customer's needs. All equipment is built with robustness in mind and remarkably high standards of hygiene.

Key benefits

  • Intelligent Batching Algorithm
  • Modular concept
  • Hygienic design
  • Service
  • Flexible design
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MARELEC has extensive experience in grading solutions. Each customer or situation is unique. With its solid background and experience in grading systems,  MARELEC can offer a wide range of solutions for the specific needs of each customer. MARELEC places a priority on openness with customers, in order to fulfil needs and expectations. 

All grading systems consist of three important components:

  • Infeed:
    The infeed system will generally determine the capacity of the grader. MARELEC offers a wide range of options for these systems. The right infeed system will be selected depending on the application (type of fish) and requested capacity, ergonomics, and preliminary stages in the production process.

  • Weighing:
    Fish products are mostly weighed dynamically. Precision and speed are the most important elements of the weighing system. MARELEC provides the right solution, depending on the dimensions and weights of the products.

  • Sorting and/or batching:
    We can present a variety of solutions to you, depending on the type of fish products that need to be graded. The sorting systems we offer are not limited to pull or push arms (flippers), retract conveyors, etc. The sorting stations are fully customized to customers' specific needs. These stations can be equipped with (low angle) batching bins, presentation trays, tables, etc. Customized labels can be generated for each batch or tray by adding a label printer to the setup. 

One or more take-away conveyors can be optionally used to transport the batches or trays to the following stage in the production process. The grading systems can be connected to the MATRIX software, which allows full integration and traceability in the production line.

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Intelligent Batching Algorithm

The MARELEC intelligent batching algorithm keeps track and makes combinations of the different weights of the fish products to fill the stations to the target batch weight, with absolute minimum giveaway. MARELEC will be pleased to run a simulation to determine the optimal number of stations for your application. 

Modular concept

MARELEC grading systems are built with modular key component parts. This reduces the number of spares and guarantees swift maintenance with a minimum of downtime. 

Hygienic design

The graders have a completely open structure, without hidden corners, for ease of cleaning and disinfection. The design of the graders avoids horizontal surfaces. Batching stations can be opened easily. All electrics and electronics are contained in a completely sealed cabinet with a unique hygienic labyrinth double sealing. All materials used are FDA approved. 


MARELEC has built a strong reputation for its after-sales service. A team of service engineers is available 24/7 to attend to your queries. All MARELEC grading systems can be connected to the internet. This allows our service team to diagnose the status of the machine from our head office, so we can provide immediate assistance. 

Flexible design

A team of experienced engineers translates the customer's requirements and specific needs into a grading system that is custom designed and built. This flexible approach guarantees an accurate solution for the application maintaining the maximum throughput as priority with a minimal footprint. 

Subject to modifications for technical progress
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