Ksep® Systems

Scalable Single-Use Centrifugation Systems

Sartorius patented Ksep® technology is the only current technology that provides significant advantages for users that want to either harvest cells as product or discard cells as by-product during manufacturing.

Through the balance of centrifugal and fluid flow forces, the Ksep® retains particles, such as cells or microcarriers, as a concentrated fluidized bed under a continuous flow of media or buffer. Ksep® systems are currently being used by top biopharmaceutical companies for diverse bioprocessing applications.

Our current offerings include two models with built-in scalability and are designed to handle low to very high cell densities. Our sterile disposable sets are manufactured using class VI materials.

Ksep® Benefits

  • Simple, robust, and scalable centrifugation process with low-shear
  • Closed system with class VI
  • Integrates and/or reduces processing steps and time
  • High secreted-product recoveries even with high cell densities

Our Applications

  • Harvest | Clarification
  • Cell Therapy
  • Vaccine Manufacturing
  • Blood Processing

Functional Principle

The Ksep® Advantages


  • Integrates and/or reduces processing steps and time
  • Improves recoveries of both solids and liquids
  • Provides option to selectively remove small particulate impurities, e.g. plastic generated, cell debris
  • Built-in scalability (4-6 fold) for development and manufacturing using the same system
  • Automated with option to run in complete manual mode
  • No hardware change for different applications
  • Handles low to high cell density cultures (>150 million cells/mL) equally well

cGMP Manufacturing

  • Closed system with single-use class VI product contact surfaces
  • Simple, robust, and scalable
  • One software for all systems
  • Clog-free and continuous operation

Advanced Cell Handling

  • Imparts low shear on cells and keeps the cells intact
  • Maintains a healthy environment to sustain cell viability
  • Complete supernatant product recovery from slurry without dilution
  • Reduces intracellular protein contamination for harvest applications by keeping the cells intact

Our Products

We offer two systems for development and manufacturing. Each system has built-in scalability and is capable of running multiple applications. Both systems are fully-automated (with the option to run manually), robust, simple, and scalable. The system can be operated under sterile conditions and all consumables are delivered pre-sterilized.

All product contact surfaces are composed of Class VI materials. We also provide support for customization and IQ/OQ as per your requirements.

Ordering Information Ksep®400 Ksep®6000S
Max g-force 1000 g 2000 g
Max flow rate 114 L/hr 720 L/hr
Volume 400 mL (4x100mL) 6000 mL (6x1000mL)
Cell capacity per cycle 1-80 Billion cells 10-1200 Billion
Processing volumes 0.05-500L 0.5-6000L


Ordering Information Ksep®400 Ksep®6000S
Height 140 cm 179 cm
Length 107.5 cm 225 cm
Width 72 cm 106 cm
Weight 350 kg 2141 kg
Ordering InformationkSep400kSep6000S
All3/8" x 1/4" C-Flex5/8" x 3/8" C-Flex


Ordering Information Ksep®400 Ksep®6000S
Voltage 208-240V 1Ph 208-240V 3Ph (US) / 400V 3Ph (EU)
Current 20 A 60 A
Process air N/A 60 psi - 1/2" NPT
Connection NEMA L6-20 Customer supplied
Chilled water (optional) 1/2" NPT 3/4" NPT


Our Applications

We are continually working with clients to develop a wide range of additional applications including perfusion and microcarrier separation.

Harvest Clarification

Ksep® systems are the first single-use centrifugation systems that are completely closed. These systems are fully-automated and designed to recover >97% of product by efficient product displacement from slurry. In addition, low-shear process ensures reduced downstream contaminiation (due to cellular debris or proteolytic enzymes) and high product quality. Our systems have successfully been implemented for recombinant protein (e.g. mAb) manufacturing using CHO cell culture based processes.


Ksep® centrifuges offer the benefit of concentrating cells, while maintaining high recovery and viability. Additionally, these systems can easily be programmed to remove cell debris, dead cells, and light particulate impurities (e.g. plastic particles from single-use plastic products), while significantly reducing any aggregation of cells. Ksep® systems are truly closed systems as they do not contain any rotary seals. Our systems do not contain any filters or membranes so that they can operate without clogging or exerting shear. These features are critical for cell therapy manufacturing.

Once captured and concentrated, the cells can be efficiently washed, manipulated, and harvested. Due to built-in plug wash option, Ksep® systems can wash cells and remove contaminants below detection levels in less than 5 minutes with a small amount of media or buffer. This technology is a breakthrough for applications requiring maintenance of cellular integrity during processing. This automated process sequence is currently being used for cell therapy manufacturing, cell banking, vaccine, and large-scale blood realted manufacturing processes.

Extractables and Leachables Testing

Ensuring Safe Adoption of Single-Use Systems in Biopharmaceuticals.

Learn More

Download Datasheet

Ksep® systems solve the problems of traditional centrifugation and filtration-based cell retention systems by providing a gentle processing environment for concentration, wash, and separation of cells.


kSep® Systems - Advanced, Scalable, Single-Use Automated Centrifugation Systems

PDF | 519.1 KB

Get to Know Further Harvesting Technologies

Sartoclear® Depth Filters: Best Solution for Your Harvest

If you need to handle filtration tasks with moderate cell densities please check our Sartoclear® depth filter portfolio. With the wide range of grades...

Learn More

Consult Our Experts

Consult Our Experts

Laboratory Weighing Services

You Can Count on Our Support

Trust our comprehensive range of services for your Bioprocess: We gladly assist you with tasks like system installation, process optimization and many...

Learn More