EVOS light cubes
LED illumination
The Countess
™
3 FL Automated Cell Counter utilizes an adjustable intensity LED light source provided
by the proprietary, user-interchangeable LED light cube (see “EVOS
Because the LED light source is as close as possible to the objective, the number of optical elements
in the channel is minimized. High-intensity illumination over a short channel increases the efficiency of
fluorophore excitation, providing better detection of weak fluorescent signals.
EVOS
™
light cubes
Each user-interchangable, auto-configured EVOS
™
light cube contains an LED, collimating optics, and
filters. In addition to the brightfield channel dedicated to cell count and cell viability assays using trypan
blue, the Countess
™
3 FL Automated Cell Counter can accommodate two fluorescent light cubes for
multiple-fluorescence research applications
The following table lists some of the common fluorescent and specialty EVOS
™
light cubes available
from Thermo Fisher Scientific. For a complete list, go to
www.thermofisher.com/evoslightcubes
contact Technical Support. For instructions on changing the LED light cubes, see Chapter 10, “Change
EVOS
Light Cube
Dyes
DAPI
DAPI, Hoechst
™
, BFP
TagBFP
TagBFP
CFP
ECFP, Lucifer Yellow, Evans Blue
GFP
GFP, Alexa Fluor
™
488, SYBR GREEN
™
, FITC
YFP
EYFP, acridine DNA
C
Countess
™
3 FL Automated Cell Counter User Guide
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