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Logos Biosystems releases free web-based cell counting tool

Logos Biosystems

Researchers are now able to perform cell viability analysis online using user-uploaded images

26 Mar 2025

Industry news

Logos Biosystems, a biotech manufacturer of imaging systems for life science research, has announced that it has released a free, web-based cell counting tool, OnCellCounter™, that will enable scientists and researchers to perform basic cell counting and cell viability analysis online for user-uploaded images.

OnCellCounter™, is a free online resource available through the Logos Biosystems website. All researchers and scientists are welcome to use the web tool found through the following link: https://logosbio.com/oncellcounter/

The OnCellCounter™ platform includes three simple steps: 1. Uploading the sample image, 2. Setting parameters, 3. Clicking COUNT.

Users have the option to set parameters as they would using an in-lab automated cell counter. These include the following: Minimum search size (pixels), Maximum search size (pixels), Cell detection sensitivity (1-10), Live cell sensitivity (1-10), and Noise reduction (0-9). A user-guide is also available online and can be accessed here.

“As a company founded by and operated by scientists and researchers, we prioritize innovation and continually seek ways to enhance research efforts,” commented Neon Jung, PhD, CEO, Logos Biosystems, “offering OnCellCounter™ as a free webtool falls in line with the company mission of working to improve human health through the development of imaging solutions that truly help scientists and researchers achieve their goals.”

Logos Biosystems is well-known in the life science industry for the award-winning LUNA™ family of automated cell counters which have developed a credible reputation as cell counters that are accurate, precise, and produce reliable and consistent results.

The most notable of the LUNA™ family are the LUNA-II™ (brightfield), LUNA-FL™ (dual-fluorescence), and the LUNA-FX7™ (high through-put, dual fluorescence, fully automated) cell counters. Also included in the LUNA™ family is the QUANTOM Tx™ microbial cell counter.

The newest member of the LUNA™ family is the LUNA-III™ brightfield automated cell counter. Released in September 2024, the LUNA-III™ comes equipped with machine-learning technology, a redesigned autofocus mechanism, and a new Reanalysis feature designed to cut down on waste, conserve samples, and improve workflow.

In addition, Logos Biosystems offers the LUNA™ Reusable Slide (an eco-friendly and budget-friendly slide option) as well as the LUNA™ Validation Slide (both brightfield and fluorescence slides available), plus consumable products, such as accompanying disposable slides and reagents (Trypan Blue, AO/PI, Erythrosin B Stain, etc.)


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Flow Cytometry / Cell CountingFlow cytometers are used to count, sort and examine multiple characteristics of cells. Other cell analysis equipment includes image cytometers, cell counters, fluorescence-activated cell sorters (FACS), magnetic-activated cell sorters (MACS), and a range of flow cytometry assay kits. Flow cytometers can reveal information on cell viability, cell proliferation, apoptosis and cell cycle progression, as well as identify cell populations and intracellular or cell-surface molecules. Additionally, some flow cytometers, known as FACS, have an additional sorting function after analysis. Cell counters and image cytometers count live and dead cell populations and can also conduct cell proliferation assays. Find the best flow cytometers, cell counters and cell sorters in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.Cell / Tissue CultureCell culture or tissue culture is used to study the biology of cells or tissues and to isolate cellular products in an environment which can be manipulated and well defined. Accurately control your culture environment with bioreactors or culture incubators, bind your cells to a surface or together with an extracellular matrix. Distinguish cell types with differential media or proliferate cells with certain characteristics using selective media. Enrich your media with supplements such as growth factors, sera and vitamins. Find the best cell and tissue culture products, kits and equipment in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.Cell CountingCell ViabilityCell viability assays assess the health of cells and their ability to proliferate. These tests are crucial in drug development, toxicity testing, and cell-based research. Common methods for assessing viability include MTT, live/dead assays, and flow cytometry. Browse our peer-reviewed product directory to find the best tools for cell viability assays, compare products, check reviews, and get pricing directly from manufacturers.Cell ImagingCell imaging can be achieved using a number of techniques including confocal microscopy, transmission electron microscopy, atomic force microscopy, and light sheet microscopy.Cell CultureCell culture involves growing cells under controlled conditions, typically outside of their natural environment, to study cellular behavior, drug response, and disease models. Cell culture is crucial in biotechnology and biomedical research. Explore cell culture products in our peer-reviewed product directory; compare products, check reviews, and get pricing directly from manufacturers.

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Logos Biosystems releases free web-based cell counting tool