We have validated the following kits for use on the Countess II FL Automated Cell Counter:
LIVE/DEAD Viabilty/Cytoxicity Kit (Cat. No. L3224) containing calcein AM and ethidium homodimer-1
ReadyProbes Cell Viability Imaging Kit, Blue/Green (Cat. No. R37609)
ReadyProbes Cell Viability Imaging Kit, Blue/Red (Cat. No. R37610) containing NucBlue Live/NucGreen Dead and NucBlue Live/propidium iodide
See this Application Note for details - https://www.thermofisher.com/content/dam/LifeTech/global/life-sciences/Laboratory%20Instruments/Files/0415/CO014723-Countess-II-FL-Viability-Appnote_FHR.pdf.
Find additional tips, troubleshooting help, and resources within our Cell Analysis Support Center.