Scalable Lab Milling System

with the SLS - Scalable Lab System™

Fully transferable results from small sample R&D tests up to full-scale production.


The SLS - Scalable Lab System


The SLS - Scalable Lab System

The SLS offers five powder processing solutions with one common drive. Switch processing heads within seconds, utilizing our SMARTdetect technology for easier R&D testing.

When developing new products, it is vital that results achieved in the lab be transferred to production. The SLS gives the assurance that PSDs achieved at lab-scale can be duplicated in production equipment with minimal variances in particle size distribution.

The SLS encompasses the key size reduction and material processing technologies of hammer milling, conical milling and security screening in a single platform with interchangeable heads. Designed to be space- / cost-efficient, and fully scalable to production volumes.


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The Range



SLS - L1A Head

High impact Hammer Mill capabilities creating finer particle sizes. Fully scalable to the D6A.

  • High impact hammer mill for achieving finer particle sizes.
  • Two blade configurations offer more control.
  • Adaptable to specific material characteristics.
  • Handles samples as mall as 5g without loss of yield or screen residue.
Features at a glance
  • Two blade configurations - impact & cutting.
  • Metered feed control design scalable to production models.
CAPACITIES 5g to 50+ kg/hr
PSD d50 20-300 µm
PSD d90 60-2000 µm

* Dependent on material properties & process objectives.

Conical Milling


SLS - U5 Head

Tight particle granulometry with a wide range of scalable screens / impellers. Low heat generation, fines dust and overs.

  • Tight particle granulometry for consistent repeatable results.
  • Low levels of heat, fines, dust and overs improving product quality.
  • Fully scalable results to the Quadro® Comil® Range.
Features at a glance
  • In-line spacerless design.
  • Wide range of screens / impeller choices.
CAPACITIES 50 g to 150+ kg/hr
PSD d50 150-300 µm
PSD d90 300-2000 µm

* Dependent on material properties & process objectives.



SLS - H5 Head

Primarily used for APIs, fine chemical and cosmetic applications. Predictable narrow PSDs with 30 – 70% more on-target.

  • Narrow PSDs with more on-target for high-quality outputs.
  • Predictable, repeatable results are scalable to the Quadro range.
Features at a glance
  • Two blade configurations - impact & cutting.
  • Metered feed control design scalable to production.
CAPACITIES <1 kg to 100 kg/hr
PSD d50 20-150 µm
PSD d90 60-300 µm

* Dependent on material properties & process objectives.



SLS - S5 Head

High-capacity inline security screener.

  • Inline security screening that is fully scalable to production models.
Features at a glance
  • High capacity - typically 500 kg/hr.
  • Standard deagglomeration spoiler arm.
CAPACITY <125-2500+ kg/hr
MESH SIZE min 150 µm (100 mesh)
MESH SIZE max 6.4 mm (0.25")

* Dependent on material properties & process objectives.

In detail

SLS – Scalable Lab System

Here are just some of the elements of the SLS we have designed and built:

As well as meeting the requirements of cGMP, we want to ensure that the machines we develop are well designed and safe for the user, so we follow a variety of specific industry directives.

All Fitzpatrick products are designed and manufactured in a facility with an ISO 9001:2015 accredited Quality Management System. 

The scope of this Quality Management System applies to all processes and activities which are controlled, managed and performed by employees within the Fitzpatrick company. 

The current Certificate of Registration, reference Certificate No: CERT-0123529, has been issued by SAI Global and is effective to September 3, 2021.


We offer a complete selection of ATEX-approved mills that meet the ATEX European Union directive for products used in potentially explosive atmospheres.

Our equipment is designed to handle the toughest milling applications, which is why professionals around the world choose us.   With models specifically designed to meet ATEX Zone 0/20 (1GD) or 1/21 (2GD) requirements, we provide the most comprehensively safe mills in the industry.

                         accred-atex-web   accred-ce_white-web

All equipment destined for Europe is CE marked and comes with an EU Declaration of Conformity.  It is certified to comply with the Machinery Directive 2006/42/EC,  the Low Voltage Directive 2014/35/EU and the Electromagnetic Compatibility Directive 2014/30/EU.

Our equipment is designed to meet a variety of international safety standards, so whichever country you are in we can be compliant.

Discover why the Scalable Lab System (SLS) from Fitzpatrick is world-leading and has become the equipment of choice for many pharmaceutical companies around the world.

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Our Range of Processing Equipment

We offer solutions that provide reliable and repeatable results in the following areas:
Roller Compaction
Fitzpatrick specializes in designing world-class
Roll Compactors.
Fitzpatrick specializes in designing Hammer Mills for precision particle size reduction.