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Product Detail
Countess II FL Automated Cell Counter
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Countess II FL Automated Cell Counter
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With the option for a reusable slide and fluorescence capabilities—brightfield and two user-changeable fluorescence channels—the Invitrogen™ Countess™ II FL Automated Cell Counter can count cells, monitor fluorescent protein expression, and measure cell viability.

  • Affordable—option for reusable slide to significantly reduce consumables cost

  • Accuracy—eliminate the subjectivity of manual cell counting and minimize user-to-user variability

  • Speed—count live and dead cells and measure viability and average cell size in as little as 10 seconds

Now affordable—option for reusable or disposable slides    

The mounting costs of disposable slides and tips have deterred many labs from giving up tedious manual cell counting. In response to this, the Countess II FL instrument was designed to work with a reusable glass slide , which significantly reduces the long-term consumable costs of automated counting. For researchers who want the convenience of disposable slides, the Countess II FL instrument can also use the same PMMA plastic slides developed for the original Countess Cell Counter.

Time savings

The additional time it takes to manually count cells using a hemocytometer (up to 5 minutes) compared to counting with the Countess II automated cell counters (10 seconds) is often overlooked as an added cost. An individual counting five slides per day (two samples per slide) can save ~10 hours per month by switching to an automated counter with a reusable slide. The time savings increases to ~15 hours per month when using disposable slides . This additional time can be applied to other activities in the lab, resulting in a significant advantage when switching from manual to automated cell counting.

Advanced autofocusing and counting algorithms

The Countess Automated Cell Counters contain advanced autofocusing and counting algorithms to allow you to quickly and accurately identify and count cells within a population .Countess instruments are compatible with a broad range of cell types and cell lines, and we havevalidated their use on a number of commonly used cell lines. Upon insertion of the slide the Countess instrument will automatically focus on cells, which helps to minimize user variation associated with manual focusing. Cells between ~7 µm and 60 µm and in suspension at a density of 1 x 104 to 1 x 107 cells/mL are optimal for counting.


Time savings

The additional time it takes to manually count cells using a hemocytometer (up to 5 minutes) compared to counting with the Countess II automated cell counters (10 seconds) is often overlooked as an added cost. An individual counting five slides per day (two samples per slide) can save ~10 hours per month by switching to an automated counter with a reusable slide. The time savings increases to ~15 hours per month when using disposable slides.This additional time can be applied to other activities in the lab, resulting in a significant advantage when switching from manual to automated cell counting.


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