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  Optical Sorting, Optical Sorters, Densimetric Sorters  

Optical Sorting | Densimetric Sorting

In the field of sorting technology is divided into two different product groups: Optical sorting separates products by means of color differentiations as well as brightness criteria. Densimetric tables are using density distinctions to sort pneumatically on an inclined treatment bottom with vibratory motion

Optical Sorting

With the opto-electronic sorting systems and X-ray sorting systems, it is possible to remove foreign bodies from materials which were previously not able to be sorted.Optical Sorter, Optical Sorting


Opto-Sort separates products with extremely varied compositions and color differentiations, which are difficult to sort, according to brightness criteria, color characteristics or unit size and achieves a high level of purity. We have developed various machine types depending on the application.


Improved exploitation of raw materials, increased product quality and reduced processing costs deliver not only a financial but also an ecological benefit.


Recycling glass (flat and hollow glass)
Plastic flakes (PET, PE, PP, PVC)
Different industrial minerals (limestone, talc, magnesite, refractory materials)
Rock salt
Particle size analysis

Densimetric Sorting

This technology is used successfully in many sectors such as the chemistry, wood, recycling (compost, rubble from demolition work, aluminum, etc) or the food and drink industries.Density Sorter, Density Sorting

The densimetric tables achieve outputs that surprise clients due to their efficiency in the separation process. We have a testing plant available for clients where tests are performed that, along with its extensive experience, guarantee the desired output, efficiency and capacity.

Working principle

Dry densimetric separation is achieved on an inclined treatment bottom with vibratory motion. A current of rising air crosses this bottom, which has two effects on the material to be treated:

1. Less dense products float without touching the base and slide to the bottom part due to the tilt.
2. More dense products touch the bottom and are pushed towards the top due to the vibration.

The greater the difference in density of the products, the greater the grain size bands treated.


US Process Equipment offers two densimetric table models, depending on the level of severity of the application:

FM model. Used to treat products with low density and medium grain size. They have a robust design with wear and tear parts for severe operating conditions. There are 4 versions depending on their width (0.7, 1, 1.5 and 2.4 m.).Density Sorter Model F

M model. Used to treat products with a high density and grain sizes up to 80 mm. They have a specially robust design so that materials such as crushed minerals or metals can be treated. Three models are manufactured depending on their width (0.7, 1 and 1.5 m.).

The two models can be supplied with or without a dust collection system and this can be via a cyclone or bag filter.

In the case of the M model, an extractor hood and ducts can be installed to fully or partially re-circulate the air.

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