Accurate automated cell counting and viability analysis of trypan blue-stained PBMCs using the LUNA-III Cell Counter

28 May 2026

This application note demonstrates how the LUNA-III™ Automated Cell Counter improves the accuracy of peripheral blood mononuclear cell (PBMC) counting and viability assessment using trypan blue staining. By combining an enhanced cell detection algorithm with focal plane offset adjustments, the system provides results comparable to fluorescence-based methods while maintaining a cost-effective brightfield workflow. Discover how the approach supports reliable measurement of cell concentration and viability across a range of sample conditions.

LUNA-III™ Automated Cell Counter

Logos Biosystems

The LUNA-III™ Automated Cell Counter provides unmatched accuracy with advanced algorithms, precise autofocusing, reusable slides, non-toxic dyes, network access, re-analysis options, and a compact, user-friendly design.

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LUNA-FX7™ Automated Cell Counter

Logos Biosystems

The LUNA-FX7™ is our most powerful cell counter to date, with unmatched cell counting accuracy, new 1, 3 and 8-chamber slide options, state of the art optics, dual fluorescent and brightfield detection, and precision autofocus. The LUNA-FX7™’s new features such as the Bioprocess mode, Quality Control mode, and the CountWire™ (21 CFR Part 11 compliant) software will help companies and facilities meet and surpass quality and regulatory requirements.

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Cell CountingBright Field MicroscopyCell 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.PBMC CountsCell BiologyCell biology studies the structure, function, and behavior of cells. Understanding cellular processes is essential for research in areas such as cancer biology, stem cell research, and neurobiology. Techniques like flow cytometry, microscopy, and cell culture enable researchers to explore cellular mechanisms in detail. Browse our peer-reviewed product directory to find the best cell biology tools and equipment, compare products, check customer reviews, and get pricing directly from manufacturers.Cell Staining