Particle Separators Explained & How to Choose

Dry separation cleans fine powdered plant material by removing the debris mixed in with it, such as stalk fragments, pistils and leaf dust, without using water or solvents. Because nothing gets wet, there is no drying step afterwards and nothing to recover or dispose of.

There are two ways to do it: mechanical separation, which sorts particles by size, and electrostatic separation, which sorts them by how they respond to an electric charge. This guide explains both, how they compare, and how to choose the right separator for your scale.

Why separate dry material?

Higher purity: less plant debris means a cleaner end product.
Better results downstream: cleaner material presses, stores and processes more consistently.
No fluids: no water or solvent to handle, dry out or dispose of.
More yield from the same material: leftovers can be reprocessed or sent on to another workflow.

Mechanical separation: sorting by size

Mechanical separators push dry material through mesh screens of a set micron size, usually with tumbling, shaking or vibration to keep it moving. Anything smaller than the mesh passes through and anything larger is held back. Tumblers and sifts work this way.

Mechanical separation is simple, affordable and fast for large volumes. Its limit is that it can only sort by size: debris that is the same size as the material you want passes straight through with it. See our filtration and micron guide for more on micron sizes.

Electrostatic separation: sorting by charge

Electrostatic separators give the material an electric charge and then pass it through an electric field. Different particles pick up and hold charge differently depending on what they are made of, their shape and their moisture content. In the field they follow different paths, so fine material can be drawn away from debris that is the same size.

That is the key advantage: electrostatic separation can clean material that sifting alone cannot, because it is not limited to particle size.

Plasma-assisted electrostatic separation (Plasmastatic)

The weak point of a basic electrostatic system is the charging step. If particles pick up charge unevenly, they separate unevenly. Plasma-assisted systems, sold as Plasmastatic by SC Filtration, use a controlled plasma field to charge particles more evenly and consistently before they reach the separation stage. The result is cleaner, more repeatable separation, especially with very fine material.

Mechanical vs electrostatic at a glance

	Mechanical (sifting)	Electrostatic (Plasmastatic)
Sorts by	Particle size	How particles respond to charge
Water or solvent	None	None
Debris the same size as your material	Passes through with it	Can be separated
Throughput	High	Lower per pass, higher purity
Cost	Lower	Higher
Best for	First-stage sorting by size	Final cleaning to high purity

Using both together

The two methods work best as a sequence. Sift first to get material into a narrow size range, then use an electrostatic separator to clean out the debris that sifting couldn't. Cleaned material can then go on to a rosin press or into storage.

Where electrostatic separation is used

Electrostatic separation is not new. It has long been used in mineral processing, plastics and metal recycling, and food and ingredient processing, anywhere fine materials need sorting without water. Plasma-assisted systems bring the same principle to smaller-scale botanical and laboratory work.

How to choose a particulate separator

1. What you need to remove. If your debris is a different size from your material, a mechanical sift may be all you need. If it's the same size, you need electrostatic separation.

2. Batch size and throughput. Separators range from desktop units for small test batches to production machines. Match the machine to the amount you process per session.

3. Space and power. Desktop units run from a standard mains socket. Larger systems need floor space and may need planning for installation.

4. Experience. Electrostatic separation is simple to run, but results improve with understanding. Start small, learn how your material behaves, then scale up.

The SC Filtration Plasmastatic range:

Model	Scale	Good for
Plasmastatic Mini	Desktop (18 × 12 × 14 in), standard 100–230 V supply	Small batches, testing and learning the process
Plasmastatic Pilot	Pilot scale	Larger trial runs before full production
Plasmastatic V1	Production scale	Commercial processing
Plasmastatic V2	Production scale	Higher-volume commercial processing

See each product page for full specifications, or call us for help choosing.

Getting good results

Keep material dry. Moisture changes how particles hold charge. Work in a dry room and with dry material.
Pre-sift to a narrow size range. Electrostatic separation works best when it isn't also sorting by size.
Run small loads. An overloaded separator mixes fractions back together.
Clean between runs. Residue on the collection surfaces reduces separation.
Reprocess the leftovers. Material that doesn't separate on the first pass can go through again or on to another workflow.

Particle separation FAQs

Does electrostatic separation use water or solvents? No. It's completely dry, using only static electricity.

Do I still need a sift if I buy an electrostatic separator? Usually, yes. Sifting first gets material into a consistent size range, which helps the electrostatic stage work better.

Does humidity matter? Yes. Damp air and damp material reduce how well particles hold charge. Dry conditions give the best results.

Is the Plasmastatic Mini suitable for commercial production? No. It's designed for small batches and testing. For production, look at the Pilot, V1 or V2.

Shop particle separators

Browse the full particulate separator range and the SC Filtration collection, or start with mechanical separation in tumblers and sifts. For advice on the right system for your scale, call the Barnsley showroom on 0114 229 1807.