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Short description

Magnetic grids are often placed at a pouring point and filter very fine magnetic and weakly magnetic ferromagnetic contamination from free-flowing powders and granulates. Often used for control purposes. Manual cleaning (quick cleaning).

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  • Easy to install
  • Low overall height
  • Capture Fe particles from 30 µm
  • Max. particle size 10 mm
  • Neodymium magnetic bars
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Magnetic grids neodymium easy clean
  • Magnetic grids neodymium rectangular
  • Magnetic grids neodymium round
  • Grid Magnets neodymium in tube brush

Detailed product description


Magnetic grids filter ferromagnetic (Fe) metal contaminants from freely falling, free-flowing powder and granulate flows in square or round piping systems.

Our magnetic grids are used for applications in the plastics, food, pharmaceutical, ceramics and other industries. Applications include: in the hopper of your injection moulding machine, for protection of your installation or as final inspection of your product, e.g. just prior to bagging.

Goudsmit magnetic grids consist of several very powerful Neoflux® (neodymium) magnetic bars. These are located in the middle of your product flow and can therefore capture the smallest ferrous particles, down to 30 microns. Even stainless steel scrapings can be captured; these particles are so small that they cannot even be detected by a metal detector.

An effective use is to place two magnetic grids in a cascade configuration so the product flowing past them must contact the magnetic bars or at least pass extremely close to them. We usually also use this method with our Cleanflow magnets (grids in housing).


Goudsmit magnetic grids are very robust due to the double tube construction (extractor). They are available as standard in a number of square and round versions; special dimensions available on request.

The neodymium magnetic bars in our grids are fitted with surrounding extractor tubes that make manual wiping unnecessary. By pulling the unit with the magnetic bars out of the extractor tubes, the captured metal contaminants fall off the extractor tubes by themselves. We call this ‘manual quick cleaning’.

The extractor tubes also serve to protect the magnetic bars so they last longer than when the magnetic bars are directly in the product flow. The magnet bars themselves are also fitted with surrounding tubes, for protection of the neodymium magnetic material, which makes the rods more durable and easier to clean.


The procedure for cleaning the filtered iron particles from the magnets is as follows:

  • stop the product flow;
  • remove the entire grid from the product chute or hopper and place it on a pre-cleaned, non-magnetic surface (e.g. wood, aluminium or stainless steel);
  • remove the retainer for the two grid parts;
  • pull the grid part with the magnetic bars out of the extractor section;
    The captured metal particles now fall off the extractor tubes. Make sure you keep the magnet bars away from these magnetic metals during this procedure.
  • lay the part with the magnetic bars on another well-cleaned surface;
    Now make sure you also place the magnetic bars far enough away from the magnetic particles.
  • dispose of the metal contaminants;
  • if necessary: clean all the grid parts with a dry cloth and/or suitable stainless steel cleaning fluid;
  • mount the two grid parts and the retainer;
  • place the grid back in the product chute or hopper;
  • restart the product flow.




  • Type manual cleaning (without extractor)
  • Available magnet qualities:
    NdFeB GSN-42, Br 13, 200 gauss (at 20 °C), Tmax 80 °C
    NdFeB GSN-42SH, Br 13, 200 gauss (at 20°C), Tmax 150°C
    NdFeB GSN-30EH, Br 11, 100 gauss (at 20 °C), Tmax 180 °C
    NdFeB GSNS-52, Br 14, 600 gauss (at 20 °C), Tmax 70 °C