Countess 3 vs LUNA-III Cell Counting Microscope UK

Which benchtop automated cell counter is best for your UK lab? Independent comparison with manufacturer links.

Independent UK guide: We compare the Countess 3 and LUNA-III on features, speed, fluorescence options and UK support. We do not sell either system. Links go to Thermo Fisher Scientific UK and authorised UK distributors.

Verdict for most UK labs: the Countess 3 wins for speed, touchscreen workflow, optional fluorescence upgrade and UK service coverage. The LUNA-III is a capable entry alternative if you only need brightfield counts and value the built-in printer option.

Head-to-Head Comparison Table

FeatureCountess 3LUNA-III
Count time~10 seconds per sample~15 seconds per sample
FluorescenceOptional (Countess 3 FL upgrade)No (use LUNA-FL for fluorescence)
Display / interfaceLarge capacitive touchscreenLCD touchscreen + built-in printer option
Sample typesMammalian cells, primary cells, stem cellsMammalian cells, yeast, some insect lines
Viability dyeTrypan blue (fluorescence with FL upgrade)Trypan blue only
Result exportUSB, CSV, PDF reportsUSB, CSV, built-in printer option
UK service / supportThermo Fisher Scientific UK service networkCamlab / SciQuip UK distributor support
Best forHigh-throughput reproducible counts + upgrade pathBudget brightfield counting with printer

Why the Countess 3 Leads

  • Fastest sample-to-result time in this comparison (~10 s)
  • Capacitive touchscreen workflow that is easy to train across a team
  • Optional Countess 3 FL fluorescence upgrade for AO/PI/GFP viability
  • Shared UK service path with EVOS and CellInsight systems
  • Broad UK consumables stock through Fisher Scientific UK
View Countess 3 on Thermo Fisher UK →

When the LUNA-III Makes Sense

  • Lower-tier brightfield-only counting for tight budgets
  • Built-in printer option for paper traceability
  • Simple operation for routine cell-line maintenance
View LUNA-III on Camlab UK →

Frequently Asked Questions

Which is better, Countess 3 or LUNA-III?

For most UK labs the Countess 3 is the better choice because it counts in under 10 seconds, has a proven touchscreen workflow, offers an easy fluorescence upgrade path (Countess 3 FL), and is backed by Thermo Fisher Scientific UK service. The LUNA-III is a strong budget alternative if you only need brightfield counts and want built-in printer convenience.

Does the Countess 3 have a UK service contract?

Yes. Thermo Fisher Scientific UK offers installation, training, qualification and on-site service contracts for the Countess 3 and Countess 3 FL through the same organisation that supports EVOS and CellInsight systems.

Can the LUNA-III do fluorescence counting?

The LUNA-III is brightfield only. For fluorescence viability or GFP counting in the Logos range choose the LUNA-FL. For a Thermo Fisher fluorescence benchtop counter, the Countess 3 FL covers dual fluorescence and brightfield.

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