Why use a magnetic separator?

Magnetic separators remove metal foreign bodies from your product streams.

Metal foreign bodies 'contaminate' your product, and they can also cause severe damage to your machinery. Rejection of batches is costly, but it can be even more costly if the foreign bodies are not removed, making it necessary to conduct a product recall. You will then be faced with huge costs and reputation damage.


Examples of metal contaminants / foreign bodies: staples, nails and screws, bolts and nuts that have vibrated loose, wear of the moving steel and stainless steel machine parts and rust particles (corrosion).

Magnetic separators filter and remove metal contaminations from your product streams, in order to guarantee high product quality and prevent damage to machines.

Cleanflow magnetic separator SECA (easy clean) - automatic cleaning | Goudsmit Magnetics

Magnetic separator or a metal detector?

When should you use a magnetic separator?

A magnetic separator filters/traps (and later removes) or immediately removes the metal contaminants from the product flow. Magnetic separators cause practically no product loss and are suitable for removal of regularly occurring and larger quantities of metal contamination.

A metal detector is mainly used as a means of inspection for sporadically occurring metal contamination. A metal detector only detects. If you want to remove the metal particle, the production line has to be stopped, or a rejection mechanism should eject the metal particle – resulting in much product loss.

Why use a magnetic separator?

Three good reasons to install a magnetic separator.

1. Magnets improve your product quality/purity

Contamination / foreign bodies in food products can lead to claims, very costly product recalls and reputational damage. And not just in the foodstuffs industry. Even the smallest foreign bodies are undesirable in pharmaceutical, chemical or mineral bulk streams and lower the quality of the finished product.


2. Magnets prevent damage to your production machinery

By placing a magnetic separator before the inlet of your production machinery – such as grinders, ball mills, pin mills, calenders and crushers – you prevent damage to your machinery and production standstill. A magnetic separator very effectively filters metal contaminants from your bulk stream. They function continuously and provide a high level of operational reliability.


3. Magnets prevent dust explosions

Fine dust in combination with oxygen and a source of ignition can result in dust explosions. By filtering metal particles out of the product flow in advance, magnets remove an important ignition source: the impact of metal on metal. This prevents serious injuries (or worse) and  high costs from damage to your machines.


Many of our magnetic separators are suitable for use in ATEX zone 20/21. As a certified manufacturer of ATEX equipment, Goudsmit has an externally certified quality assurance system that guarantees the explosion safety of our magnetic separators.


Bar / rod magnetic filters  in grain landscape brush | Goudsmit Magnetics

Separator types

What types of magnetic separators and filters are there?

1. Plate/block magnets

Magnetic separators with plate or block magnets ('suspension magnets')

Magnetic separators with plate or block magnets have a deeply penetrating magnetic field for capturing ferromagnetic metal particles as small as 1 mm. The plate magnets are mounted on the outside of the pipe channel. Plate magnets, chute magnets and external pole magnets are used in pipeline transport. These systems are always permanently magnetic.


Suspension magnets (large block magnets) with and without a conveyor system (overband magnets) pull pieces of metal out of a material stream on a passing belt. Very suitable for magnetic recycling & sorting. These systems can be permanently magnetic or electromagnetic.

2. Magnetic bars

Magnet separators with bar magnets ('magnetic fingers')

Magnetic separators with magnetic bars have an extremely powerful yet less deeply penetrating magnetic field. They are mounted inside the product channel, this way making direct contact with passing product. They are therefore best suited for trapping small ferrous contaminants and even weakly magnetic (e.g. cold-worked stainless steel) contaminants as small as 30 µm. Placed in filling openings and pipelines.


Our magnetic grids, Cleanflow magnets and magnetic filters make use of bar magnets.

3. Cylindrical types

Magnetic separators with cylindrical magnets

You find cylindrical magnets in our bullet magnets, magnetic drum separators, magnetic head pulleys and eddy current non-ferrous separators. With the exception of the bullet magnet, these magnets dispose of the captured metal particles directly and continuously. They are therefore capable of separating or sorting large quantities of metal contaminations.


Bullet magnets and magnetic drum separators can be found in the solutions group "Magnetic filtering". Extra robust types of magnetic drum separators, magnetic head pulleys and eddy current separators can be found in the solutions group Magnetic recycling & sorting.

Different types of magnetic separators | Goudsmit Magnetics