Thermo Fisher Scientific Countess II Automated Brightfield Cell Counter with Viability Analysis

The Thermo Fisher Scientific Countess II Automated Cell Counter delivers precise, rapid single-channel cell counting and viability analysis, critical for biotechnological and molecular biology workflows. Utilizing advanced brightfield digital imaging with a 5-megapixel camera and 2.5× optical magnification, it reliably detects cells sized from 4 to 60 µm and assesses viability in cells ranging 7–60 µm.

Key features include:

• Autofocus system and a dedicated image analysis algorithm for consistent cell identification
• A field of view measuring 2.15 mm × 1.62 mm (3.48 mm²), enhancing counting accuracy
• Compatibility with trypan blue staining and single-use two-chamber disposable slides, minimizing contamination and variability
• Suitable concentration range from 1×10^4 to 1×10^7 cells/mL, accommodating various sample types in biotechnology and clinical diagnostics
• Minimal sample volume requirement of 10 µL, optimizing precious biological material usage
• Export capability via USB for data storage and further analysis, supporting laboratory informatics integration

This compact, lightweight (11 lbs) instrument operates on 100–240 VAC power and includes a user-friendly touchscreen controller, facilitating easy operation in cell culture labs, bioprocessing facilities, and molecular diagnostics environments. The Countess II plays a pivotal role in enhancing workflow efficiency in gene editing, synthetic biology, and biomanufacturing, offering reliable performance widely adopted in fluorescence analysis and live-cell imaging preparatory processes.

Designed for scientists, researchers, and medical professionals, this automated counter replaces manual counting, reduces operator variability, and supports critical applications such as cell viability testing essential for molecular cloning workflows and biopharmaceutical production pipelines.