Virus Analytics

Rapid Virus Quantification

Products from ViroCyt, now part of Sartorius Stedim Biotech, are leading the field of rapid virus quantification. Our goal is to provide the tools that deliver meaningful improvements to mission critical processes, where viruses play a significant role.


  • Vaccine production
  • Protein expression
  • Viral therapeutics
  • Antiviral development

Our virus quantification products offer a new approach to enable direct, biologically-specific quantification of viruses in minutes, rather than the days or weeks required by more traditional methods. Virus samples are labeled with specifically-developed reagents in a no-wash assay. The purpose-build platform enables quantification of total virus particles in three minutes per the sample, giving users real-time insights into viral titers.

Meet The Virus Counter Platform: The Powerful Tool for Rapid Virus Quantification

The Virus Counter® Platform is in use by leading companies, regulatory agencies, and research agencies around the world. Why? A growing body of evidence demonstrates that noninfective particles are of biological importance and can impact both in vitro and in vivo studies. Infectivity and total particle concentration are essential for an in-depth sample characterization.

Discover Latest Results Obtained for Coronaviridae Quantification

Download the poster on rapid total viral particle quantification for viral families.

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See all Virus Counter® Product Specifications and Request Your Quote

Vaccine Process Development and Manufacturing

Racing for a Viable Vaccine: Expediting Vaccine Development Amidst a Pandemic

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The Virus Counter Platform Delivers More of What Matters When Quantifying Viruses

  • Speed - Real-time quantification for process monitoring and production optimization
  • Biologically-relevant readout – Total viral particle quantification
  • Versatility - High-specificity and universal quantification reagents
  • Ease of use – software-assisted system operation (including 21CFR Part 11 capabilities)
  • Reliability – Rugged design for industrial settings, easy system maintenance

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Versatility – More Than You Can Count

Our Combo Dye® reagent and ViroTag® reagents offer the optimal solution for all virus quantification needs.

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The Impact of Rapid Virus Quantification - BPI Webcast
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Simple, No-Wash Assay

Both Combo Dye® and ViroTag® labeling systems use a rapid, no wash-assay workflow.

With the Virus Counter® 3100 platform, use this rapid, no wash labeling procedure and take virus quantification to new levels of accuracy, speed and simplicity.

Quantifying Viruses? Here's What Matters Most!

In her Q&A with BioPharm International, Antje Schickert, Product Manager Virus Analytics at Sartorius Stedim Biotech, explains how our Virus Counter Platform makes even the trickiest virus enumerations count!

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Virus Counter Platform

Accelerate Vaccine Development With Rapid Total Particle Quantification

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