Accurate Cell Counting: Fast, Reproducible, and Efficient

CASY transforms cell counting with unmatched precision and reproducibility. Made in Germany, CASY is designed for researchers who prioritize precision, innovation, and simplicity

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Key Facts

Applications

Consumables

Literature

FAQ

Your Challenges in Cell Counting

Innacurate cell counts and inconsistent results.

Time-consuming manual processes.

High costs for consumables.

Solved by Cell Counter and Analyzer

Great reproducibility from large stem cell aggregates to small yeast or even bacteria
Automated, dye-free counting for maximum accuracy
Faster analysis without complex sample preparation
Low running costs

"Already 20 years ago, I was searching for a machine which can count the cells in extremely short time. And I have found CASY as the machine which is very quick and also accurate. It is never broken."

Dr. Aziz Cayli, Founder and Chief Scientific Officer of Florabio

CASY - the Perfect Partner for Your Research

Elevating Cell Counting with Innovation, Accuracy, and Simplicity

Unmatched Precision and Reproducibility

CASY sets the standard in cell counting, delivering accurate, reproducible results—even with aggregates or tiny particles like bacteria.

No Sample Preparation

CASY eliminates tedious prep—dye-free, non-invasive counting saves time and preserves sample integrity.

Compatible with Various Cell Types

From stem cells and primary cells to bacteria and yeast, CASY adapts to your needs—ideal for toxicology, viability analysis, and more.

Save Costs and Time

CASY saves time and costs with minimal consumables and hands-on steps—its compact design fits any lab setup.

Regulatory Compliant

CASY supports GMP/GLP compliance with optional 21 CFR Part 11 compatibility—ideal for regulated research and QC labs.

User-Friendly Software

CASY’s intuitive software simplifies analysis and tracks cell growth, viability, and aggregation—with robust reporting for clear, reliable results.

Trusted by Experts

"We study the regulation of cancer cell growth by signaling and metabolism. CASY is the ideal system for us to precisely measure proliferation and cell size of a wide range of cell lines. In this context, the new software makes instrument operation as well as data visualization and organization easy and convenient."

Dr. Wilhelm Palm • Head of the Junior Research Group Cell Signaling and Metabolism • German Cancer Research Center

"We use CASY cell counter for toxicological studies at a single animal level. The CASY cell counter proved to be an accurate and sensitive instrument for ecotoxicological applications allowing fast, simple and label-free measurements."

Prof. Dr. Konstantinos Grintzalis • School of Biotechnology • Dublin City University

"Cytotoxicity Assays using CASY enable us to perform fast, simple and reliable assessment of anti-cancer drug regimens and the subsequent chemosensitivity of carcinoma cell lines. A major advantage of CASY is that debris and dead cells can be masked in the analysis by a simle cell line speficfic setup and only viable cells and their aggregates are considered. However, as a complete cell status is recorded, also dead cells and debris data are available at any time."

Dr. J. Weinreich • Head of Experimental Oncology • University Hospital Tübingen 

"We have successfully been using CASY for 10 years now. With CASY we are able to carry out reproducible cell culture experiments even when working with highly aggregated cells. CASY allows us to consider cell concentration and aggregation when seeding and harvesting cells, as both are measured by CASY. Measuring accurately cell number, the aggregation factor and the cell volume, gives us the opportunity to express analytical data as concentration per cell. Additionally, the molar amount of a substance within a cell can be calculated (used for example for metal uptake in μΜ)."

Prof. Dr. Julia Bornhorst • Professor for Food Chemistry with focus on Toxicology • University of Wuppertal

"We have been using CASY for the fast and reliable determination of cell concentrations and cell diameters of our cell cultures for 20 years now. We are still impressed by the high reproducibility of the measurements and the simple, intuitive operation of the device. The associated software offers great options for managing and displaying the measurement results graphically."

Dr. Heike Schwarz • Head of Cell Biology Department • DIARECT AG

"The CASY counter has been a key piece of equipment for the Oxford COVID-19 vaccine trial. We needed a reliable way to count cells from hundreds of blood samples on a daily basis. The CASY counter is a fast and accurate way of counting PBMCs. It is easy to use as it requires no sample preparation or staining, just add your sample to the CASYton buffer solution and it is ready to go! It is the gold standard of cell counting and we felt confident using it in our clinical trial due to its high reproducibility and accuracy."

Helen Sanders - Jenner Institute, COVID-19 Vaccine Trials

Applications

"With CASY, we achieved more efficient and precise analysis of cell cultures."

- Prof. Dr. Julia Bornhorst, University of Wuppertal

CASY Technology

PBMCs

Cytotoxicity

Algae Feeding-Daphnia

Track T-Cell Activation

iPSCs

Algea and Protozoa

Bacteria

Erythrocytes & Platelets

Primary Cells

Fungi Spores

Pollen Counting

Trypanosoma & Leishmania

Saccharomyces Cerevisiae

Literature

CASY Cell Counter and Analyzer – More Than Counting: Explore the Latest Publications

CASY Powers Precise T-Cell Proliferation Studies
Validating CRISPR Screens with Confidence: Accurate T-Cell Viability
Quantifying Critical Cell Volume Dynamics: CASY Reveals Key to T-Cell Activation
Tracking Viral Persistence: Robust Viability Data in Viral Research
Predictive Power: Reliable TB Vaccine Research
Unveiling Platelet-Monocyte Interactions: Precision in Immune Response Research
Unraveling Inflammation Resolution: Real-Time Precision in Microfluidic Migration Assays

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CASY Consumables

Scientists count on CASY for decades

CASY Cell Counter and Analyzers — *CASY Cell Counter through the years.*

FAQs

The CASY Cell Counter is an advanced cell analysis system that provides accurate cell counting, viability assessment, and volume measurement using label-free electrical current exclusion (ECE)-based technology.

The system is based on electrical current exclusion (ECE) to analyze cells as they pass through a defined measurement pore, providing precise data on cell concentration, viability, and volume.

CASY can analyze a wide range of cells, including mammalian cells, yeast, bacteria, algae, and other microorganisms, making it suitable for various research and industrial applications.

Yes! CASY features an intuitive interface, minimal sample preparation, and an user-friendly software for data analysis, making it ideal for both beginners and experienced researchers.

Yes, it differentiates between live and dead cells without staining by detecting differences in membrane integrity using electrical current exclusion (ECE).

CASY is calibrated for a lifetime, eliminating the need for regular quality control with calibration beads.

CASY requires minimal maintenance, with a recommended weekly cleaning routine to ensure optimal accuracy.

Yes, we provide online and in-person training sessions to ensure you get the most out of your CASY Cell Counter and Analyzer.

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Accurate Cell Counting: Fast, Reproducible, and Efficient

Your Challenges in Cell Counting

Solved by Cell Counter and Analyzer

CASY - the Perfect Partner for Your Research

Trusted by Experts

Applications

Literature

CASY Consumables

Scientists count on CASY for decades

FAQs

Cell Counting

Cell Culture

cell analysis

Imaging

Microbiology

Advanced CELL Research

BIO-banking & solutions

antibody applications

Pandemic response

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about us

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Accurate Cell Counting: Fast, Reproducible, and Efficient

Your Challenges in Cell Counting

Solved by Cell Counter and Analyzer

CASY - the Perfect Partner for Your Research

Trusted by Experts

Applications

Literature

CASY Consumables

Scientists count on CASY for decades

FAQs

antibody
applications

Pandemic
response