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Invitrogen™ Countess™ 3 Automated Cell Counter + REX Extended Warranty

The Countess 3 Automated Cell Counter is a benchtop cell counting system equipped with an advanced machine-learning algorithm, ruggedized optics, fully-automated focus and lighting, and image analysis software for rapid assessment of primary and immortalized cell samples.

Supplier:  Invitrogen™ A49862


Catalog No. A49862

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  • Accurate—eliminates the subjectivity of manual cell counting and user-to-user variability
  • Fast—counts live and dead cells, measures viability, and reports average cell size with a single touch in about 20 seconds
  • Convenient—requires no cleaning or routine maintenance; flush-mounted high-resolution capacitive touchscreen and simple user interface provide quick startup, require minimal training, and offer automatic saving of data to USB or cloud

The Countess 3 Automated Cell Counter works in two simple steps:

1. Mix 10 μL of sample with 10 μL of trypan blue and pipet into a disposable Countess chamber slide.

2. Insert the slide into the instrument. Rapid Capture and Auto-Save modes allow cell counting with a single touch. Focus, lighting, and file saving are executed automatically.

Get accurate cell counts

The Countess 3 Automated Cell Counter uses trypan blue staining combined with auto-focus and lighting driven by a machine-learning image analysis algorithm to obtain accurate cell and viability counts. The measurement range extends from 1 × 104 to 1 × 107 cells/mL (the optimal range is 1 × 105 to 4 × 106 cells/mL), which is broader than that of a hemocytometer.

Transfer data and images to your PC or cloud

Using the USB port on the Countess 3 Automated Cell Counter and any USB drive, you can save your cell count results and images and transfer them to your PC. (For your convenience, a USB drive and WiFI dongle are supplied with the Countess 3 instrument).

REX Extended Warranty

Keep your cell counter up and running with an extended warranty that covers all costs for shipping, parts, and labor for repairs.



User-installed automated cell counter
Trypan Blue, Countess Chamber Slides, and Reusable Slide
Power supply, disposable & reusable slide holders, USB drive, 1 Box disposable chamber slides
LCD 1280 x 800 pixels
9 in. (228.6 mm) W x 5.5 in. (139.7 mm) D x 9 in. (228.6 mm) W
3.6 kg
Onboard & USB drive
8 lb.
100-240 VAC
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