The SLS - Scalable Lab System

Laboratory milling & processing platform

Five powder milling & processing solutions in one platform for effective laboratory scale research & development.



Our lab scale milling equipment


The Scalable Lab System (SLS)

A unique benchtop powder milling and screening platform offering five milling, size reduction, and processing solutions. Smart-Detect technology enables the milling and screening heads to be swapped within seconds with no setup required.

Lab-scale milling and processing to production

The SLS Scalable Lab System gives the reassurance that particle sizes and distributions achieved in the lab can be directly transferred to the production-scale equipment. The operating parameters are simply transposed from small-scale to full-scale production.

Key size reduction and material processing technologies are possible from one single platform. Using the interchangeable heads you can achieve lab-scale conical milling, hammer milling and screening. The built-in Smart-Detect technology recognizes the head being installed and adjusts the speed range accordingly. This bench-top size milling machine is space-saving as well as cost-effective to own.

  • Reduce capital investment with the SLS: four interchangeable heads on a single drive platform.
  • Save development time: change out the head for a different process.
  • Extensive screen and impeller options to complement application requirements.
  • SMARTdetect™ technology ensures repeatability and consistency.
  • Ready for production? Easily scale up to the SDx Series.


The Range

Conical Milling

SLS Comil®

Conical Milling

High-performance conical milling - ideal for all lab milling applications.

  • Consistent repeatable results with tight granulometry.
  • Improve product quality with low levels of heat, dust and fines.
  • Fully scalable to the Quadro® Comil® production-scale mills.
  • Compact benchtop laboratory mill. 
Features at a glance

  • U5 Comil conical mill.
  • In-line spaceless design.
  • Wide range of screens & impeller choices to suit the application.
CAPACITIES 50 g to 150+ kg/hr
PSD d50 150-300 µm
PSD d90 300-2000 µm


SLS Comil® Resources

PDF Resources


SLS Fitz Mill


High-impact lab hammer mill for achieving finer particle sizes.

  • Adaptable to specific material characteristics - including hard and fibrous products.
  • Handle samples as small as 5g without loss of yield or screen residue.
  • Fully scalable to the Fitzpatrick milling range.
Features at a glance

  • FitzMillTM L1A hammer mill.
  • 2 blade styles - impact & cutting.
  • Metered feed control design scalable to production.
CAPACITIES 5g to 50+ kg/hr
PSD d50 20-300 µm
PSD d90 60-2000 µm


SLS Fitz Mill Resources

PDF Resources

SLS High Energy

SLS High Energy

Conical Milling

High Energy conical milling.

  • Ideally suited to API and fine chemical processing - which require more energy.
  • Narrow PSDs with 30-70% more on-target particles.
  • Predictable, repeatable particle sizes.
  • Results fully scalable to the production-scale equipment.
Features at a glance

  • H5 High-Energy Comil cone mill.
  • Integrated feed system for increased containment and predictability.
CAPACITIES <1 kg to 100 kg/hr
PSD d5020-150 µm 20-150 µm
PSD d90 60-300 µm


SLS High Energy Resources

PDF Resources

Security Screening

SLS FlexSift

Security Screening

In-line security screening.

  • Ideal for deagglomeration.
  • High capacity for efficient testing protocols.
  • Utilises standard equipment for fast clean down.
  • Fully scalable to the production size equipment.
  • Compact tabletop lab mill, install within minutes.
Features at a glance

  • S5 Quadro FlexSift
  • High capacity - typically 500 kg/hr.
  • Standard deagglomeration spoiler arm.
CAPACITIES <125-2500+ kg/hr
MESH SIZE min 150 µm (100 mesh)
MESH SIZE max 6.4 mm (0.25")


SLS FlexSift Resources

PDF Resources

In detail

Lab-scale milling & processing

Here is a sample of what 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 Quadro 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 executed by employees within Quadro Engineering. 

The current Certificate of Registration, reference Certificate No: CERT-0123530, was issued by SAI Global and is effective until September 2, 2024.


ATEX compliant milling equipment

We offer a complete selection of ATEX and UKEX certified mills that meet the European Union directives and UK Safety Regulations 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 Quadro.   With models specifically designed to meet Ex Zone 0,20 (1GD)  or 1/21 (2GD) requirements, we provide the most comprehensively safe mills in the industry.

 All equipment destined for Europe is CE-marked and UKCA-marked for Great Britain. It comes with an EU or UK Declaration of Conformity or Declaration of Incorporation.   European equipment is certified to comply with the Machinery Directive 2006/42/EC, the Low Voltage Directive 2014/35/EU the Electromagnetic Compatibility Directive 2014/30/EU. British equipment is certified to comply with the 2008 Supply of Machinery (Safety) Regulations, 2016 Electromagnetic Compatibility Regulation, and the 2016 Equipment and Protective Systems Intended for Use in Potentially Explosive Atmospheres regulations.

Our equipment is designed to meet a variety of international safety standards, ensuring that whichever country you are in, we can certify compliance.



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





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Our Range of Scalable Milling Solutions

With our decades of experience in manufacturing milling equipment, we have expertise in a range of powder processing and sizing solutions.
We offer wet and dry milling and sizing solutions that provide reliable and repeatable results for both the lab and production scale.

Achieve tight particle size distributions in a wide variety of applications.


Replace labor-intensive, expensive manual separation processes.

Fine Grinding

Fine powder grinding, producing the highest percentage within the target PSD.

Security Screening

Avoid contamination by ensuring powder is free from foreign materials or impurities.

Hammer Milling

Within our IDEX platform, The Fitzpatrick Company provides expertise in hammer milling.