Onion grading: make every onion count and leave nothing to waste.

Grading technology and sorting machinery that will optimize your packhouse performance

Why choose TrueSort™ for onion grading?

TrueSort™ software is fast and accurate and enables you to sort onions at a speed of 12 units per second per lane. While yielding high productivity and accuracy, it will allow you to open new markets and get premium prices for your product. Our technology is designed to reduce packing costs and making your packhouse more efficient. Choose Ellips, and we will revolutionize your business.

Flexible Solutions
Our vision system is designed to operate on virtually any manufacturer’s sorting equipment. This enables you to select the appropriate grading machine or to retrofit your existing sizer.

  • Perfect colour & size accuracy
  • Accurate defect detection
  • Labour cost reduction
  • Significant capacity improvement
  • Increased process efficiency

Download the brochure: this is how you achieve next level onion grading

  • You gain insights which defects can be graded
  • You will learn about the possibilities of Ellips optical grading software
  • You better understand the capabilities of the Elisam GranTorino Onion Grader
Onion Grading Brochure

    Onion grading technology

    Internal quality

    Our internal quality system detects internal rot (core, ring and neck) of yellow, red and white onions, along with other internal characteristics including early stage sprouting. Ellips TrueSort™ electronics is a user friendly system that can quickly modify grading programs to address specific issues or customer requirements. Our system enables higher quality products on a consistent basis.

    External quality

    For external quality, such as shape and context, Ellips incorporated HD cameras and LED lighting into our vision systems.
    TrueSort™allows customers to quickly establish “variety specific” grading parameters that provide consistent detection of the most prevalent external defects. Our software succesfully detects  balding, sour skin, external rot, black mold, sprouting, misshapen/doubles and mechanical damage.
    Once the defects are identified, our grading software sorts the onions into various grades (i.e., premium, second, peeler, cull, etc.).

    Colour separation

    Based on live feedback from the cameras our system is capable of determining the colour on which you want to grade the onion (and to detect bald onions).
    By rotating the product under the camera it is possible to combine consecutive images of one camera or images from multiple cameras at various angles in order to receive as much information as possible. Ultrafine colour separations are obtained through our TrueSort™ intuitive software that enables operators to quickly create or modify colour spectra.

    Size separation

    Our size module is able to determine properties of the onion and to detect loose skins which can still be sticking to the product. The measurements are more reliable by looking at the product from various angles. Hence the onion is rotated under the camera and 10 images are taken of each product. This permits you to calculate the diameter (with an accuracy of 0.1mm), length and surface area.


    The weight of every single onion can be measured on a cup system or roller system with a built-in weighing system. Accurate weighting (+/- 1 gram) is possible, even at high speed (up to 10 cups/second). The system automatically takes into account factors such as temperature differences and dust accumulation throughout the day.

    Are you ready for next level grading?

    Would you like to know more about our grading solutions for onions or would you like to book a demonstration? Please fill in the contact form and one of our experts will reach out to you.