Sample Concentration - Diafiltration (Buffer Exchange, Desalting)

Less Time at the Centrifuge, More Time for Research

The µPULSE® - TFF System is a fully automated, walk away system that uses tangential flow filtration (TFF) for sample concentration and diafiltration (buffer exchange, desalting).

Untitled (10)

Walk-Away System
Set your desired parameters and let the system do 95% of the process automatically until it is time to collect your sample; Remotely monitor via a web-based application.


Permeate flow rate up to 2.5x faster than centrifuges with dead-end filters.


Scalable Process
Whether you are trying to scale up or down, µPULSE allows you to control all the parameters of an industrial TFF, at the research scale.


Wide Range of Operating Volumes
Concentrate from 100mL to 1mL with up to 250 mL of buffer exchange.


Lowest Hold-up Volume in the Industry
Our patent-pending pump design offers just 0.65 mL of hold-up volume. Up to 100% hold-up recovery with automated recovery options.


Easy Maintenance
All components in the fluid path are disposable consumables.


The µPULSE consumable chips can be cleaned in place for re-use up to 300 mL of permeate (sample dependent).

Stop Wasting Time Checking on Samples

Simply enter your starting and final volume with optional diafiltration - The μPULSE® - TFF System takes care of the rest.

See Your Progress

No need to stop your progress to check on samples.

Control from Anywhere

Remote control and monitoring with our web-based app.

Walk-Away System

Enter your parameters and walk away. Get notified when your sample is ready!

Easy Sample Concentration/Diafiltration (Buffer Exchange, Desalting)

“The µPULSE TFF system is a convenient and efficient method for sample concentration during our exosome isolation workflow in conjunction with qEV columns. The software is intuitive, and the instrument provides a rapid method for concentrating lab-scale volumes while maintaining high yields."
Botai Xuan
R&D and Support Manager

Compatible with the Variety of Samples

  • Processing of LNPs and liposomes (concentration and buffer exchange)
  • Concentration and purification (by buffer exchange) of AAVs and VLPs
  • Concentration and buffer exchange of nucleic acids such as mRNA and plasmid DNA (in nucleic acid-based vaccines)
  • Removal of unconjugated drugs from monoclonal antibodies
  • Purification (by buffer exchange) of conjugated polysaccharide vaccines
  • Concentration and refolding of proteins
“The µPULSE unit is both easy to set up and to use. The unit works as it should, being able to filter, and concentrate both crude recombinant fungal and bacterial cultures. The volumes, programmability of desired output in terms of buffer exchange and concentration, make this a superior option to spin filtration units. The disposable filter units are extremely robust and available in convenient cutoff sizes such as 10, 30 and 50 kDa: all relevant cutoffs for our applications."
Kirk Schnorr
Senior Science Manager

Concentrate Samples Faster with TFF

Unlike centrifuges with traditional dead-end filtration systems, the µPULSE prevents a high concentration gradient from forming at the filtration membrane. This means no reduction in the permeate flow rate and increased sample recovery.


With TFF, the concentration process is continuous and gradual allowing for samples to be concentrated up to 2.5x faster than using dead-end filtration. The exact concentration rate depends on sample size and membrane cutoff size.

The µPULSE utilizes a filtration membrane that is 50 - 75% larger than traditional dead-end filtration systems. This larger membrane boasts a higher membrane flux allowing you to concentrate samples faster so you can move on with your research.

tangential flow filtration
We have used the µPULSE TFF system in our workflow for purifying extracellular proteins. The system is a great replacement for dialysis of precipitated proteins in terms of protein recovery, solubilization, and concentration. The µPULSE is remarkable in terms of time efficiency and cost-effectiveness and has undoubtedly accelerated the purification process while delivering superior results. Based on our findings, we highly recommend the µPULSE TFF system as an efficient and reliable tool in the purification of extracellular proteins."
Dr. Uzma Hameed
Assistant Professor, Institute of Industrial Biotechnology,
Government College University, Lahore, Pakistan.

Versatile for a Broad Range of Scientific Workflows



Efficiently process lipid nanoparticles, liposomes, and polymeric nanoparticles for drug delivery and therapeutic efficacy



Optimize the protein preparative workflow, enabling fast and gentle processes, including concentration, formulation, desalting, and refolding


Clearing of Labeling Reactions

Ensure gentle and efficient removal of small unconjugated molecules from a variety of crude biomolecular labeling reactions


Nucleic Acids

Simplify in vitro synthesis of RNA, and linear or plasmid DNA, by efficient concentration and buffer exchange using our user-friendly system



Streamline the fast harvesting of cells, extracellular vesicles, enzymes, and Virus-Like Particles (VLPs) while ensuring high product yields and quality



Gently concentrate and exchange buffers for Adeno-associated Virus Vectors (AAVs), bacteriophages, and lentiviruses, preserving their structure for effective applications


Vaccine Formulations

Optimize the formulation of DNA, RNA, and polysaccharide vaccines for optimal, stable, and cost-efficient results


Easy to Maintain with Disposable Filter Chips

The μPULSE - TFF System uses disposable filter chips and transfer tubing. The entire fluid path can be cleaned in place for re-use or discarded for single-use.


Cover a wide variety of sample sizes with 5, 10, 30, 50, 100, and 300 kDa MWCO PES (polyethersulfone) membranes.

"We are really pleased with the performance of the µPULSE-TFF system, which we have employed in our workflow for purification of Virus-Like Particles (VLPs). The automated system is user-friendly, processes samples quickly and is cost-effective. As a trustworthy and effective method for concentrating the VLPs, I gladly endorse the µPULSE-TFF system for use in routine lab-scale processing of VLPs."
Jeffrey Stear, PhD.
Research Fellow,
School for Biomedical Sciences

Simple Diafiltration

Buffer Exchange, Desalting

Along with concentrating your sample, there is an option for automatic diafiltration to facilitate buffer exchange or desalting processes.


Setup is easy with 15 or 50 mL centrifuge tubes located at the front of the system:


  • One tube holds your sample solution
  • The other a buffer or any other solution of your choice


The system can be refilled with up to 250 mL of buffer for high diavolume exchanges.

uPULSE v3 15 ml jpeg (1)
"The µPULSE TFF system is a nice compact system for sample diafiltration and concentration. As an efficient alternative to size exclusion chromatography, we have successfully integrated the µPULSE in the process of ADC production (starting volumes between 2 and 50 mL), either for the elimination of residual drug (from the conjugation mix) or for ADC formulation purposes. We are entirely satisfied."
Dr. Raul Pardo
R&D, Manager, Antibody Drug Conjugates

Easy Setup - Monitor from Afar

The µPULSE utilizes an intuitive, web-based software application that can be run on the device or via external devices on the same network.


This easy-to-use solution allows the user to set up the starting and desired volumes and concentrations, diafiltration or buffer exchange, and modify advanced settings to optimize concentration for your samples.


Users can remotely monitor the process of their concentration instead of having to manually check.

"The µPULSE was easy to use right out of the box and fit our process testing needs quite well. It performed comparatively well against our established TFF process and we were able to translate our older process onto the instrument with minimal issues."
Bijou Bose
Associate Director, Application Sciences