Merck Guava easyCyte 6-2L Flow Cytometer
| Brand | Merck |
|---|---|
| Origin | USA |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Product Category | Imported Instrument |
| Model | guava easyCyte 6-2L |
| Product Type | Flow Cytometer |
| Sample Vial Format | 1.2 mL or 1.5 mL microtubes |
| Fluorescence Channels | Red2 (661/19 nm), Red1 (690/50 nm), Yellow (583/26 nm), Green (525/30 nm) |
| Excitation Lasers | 488 nm blue laser, 638 nm red laser |
| Parameters Measured | 6-parameter (4 fluorescence + 2 light scatter) |
Overview
The Merck Guava easyCyte 6-2L Flow Cytometer is a compact, benchtop flow cytometry platform engineered for precision cell analysis in core laboratories, academic research facilities, and biopharmaceutical quality control environments. Unlike conventional flow cytometers requiring complex fluidics and high maintenance, the easyCyte 6-2L employs microcapillary-based sample introduction and hydrodynamic focusing—eliminating sheath fluid consumption and minimizing carryover between samples. Its dual-laser architecture (488 nm blue and 638 nm red) enables simultaneous excitation of common fluorophores including FITC, PE, PerCP-Cy5.5, APC, and APC-Cy7, supporting robust multicolor panel design. The system delivers absolute cell counts without reliance on counting beads—leveraging integrated volumetric sampling and calibrated flow rate measurement—ensuring traceable quantification compliant with ISO 13845 and CLSI H42-A3 guidelines for cellular enumeration.
Key Features
- Dual-laser excitation (488 nm and 638 nm) enabling six-parameter detection: forward scatter (FSC), side scatter (SSC), and four spectrally resolved fluorescence channels (Green: 525/30 nm, Yellow: 583/26 nm, Red1: 690/50 nm, Red2: 661/19 nm)
- Optimized optical path with high-transmission bandpass filters and low-autofluorescence quartz flow cell to maximize signal-to-noise ratio and minimize spectral spillover
- Microtiter-compatible autosampler accepting standard 1.2 mL or 1.5 mL microcentrifuge tubes—no need for specialized racks or plates
- Integrated volumetric acquisition engine providing direct absolute cell concentration (cells/µL) with ±5% CV reproducibility across run-to-run and instrument-to-instrument validation
- Self-contained fluidics with disposable microfluidic cartridge—reducing downtime, eliminating alignment procedures, and supporting GLP-compliant audit trails
Sample Compatibility & Compliance
The easyCyte 6-2L accommodates primary cells (e.g., PBMCs, whole blood lysates), adherent cell lines (post-trypsinization), and suspension cultures without pre-enrichment or filtration. Its low-shear microcapillary delivery preserves fragile cell surface epitopes and viability—critical for immunophenotyping and functional assays. The system meets IEC 61010-1 safety standards and is validated per FDA 21 CFR Part 11 for electronic records and signatures when used with Guava InCyte software in regulated environments. All assay protocols—including apoptosis, cell cycle, intracellular cytokine staining, and phospho-flow—are aligned with ASTM E2810 and USP recommendations for flow cytometric method verification.
Software & Data Management
Guava InCyte software provides a validated, intuitive interface for experimental design, real-time data acquisition, and advanced analysis—all within a single application. It supports drag-and-drop gating, automatic and manual compensation matrix generation with spill-over spreading coefficient (SSC) calculation, and batch processing of multi-sample datasets. HeatMap visualization enables rapid identification of population shifts across treatment conditions, while built-in curve-fitting modules generate IC50/EC50 dose-response models using nonlinear regression (four-parameter logistic fit). Audit trail functionality logs all user actions—including gate edits, compensation adjustments, and export events—with time stamps and operator IDs, satisfying GMP documentation requirements under Annex 11 and ALCOA+ principles.
Applications
- Immunophenotyping of leukocyte subsets (CD4+/CD8+ T-cell ratios, B-cell maturation markers, myeloid dendritic cell profiling)
- Functional signaling analysis via phospho-specific flow cytometry (e.g., p-STAT5, p-ERK, p-S6)
- Cell health assessment: Annexin V/PI apoptosis staging, CFSE proliferation tracking, mitochondrial membrane potential (JC-1)
- High-content cytokine detection using intracellular staining (IFN-γ, IL-2, TNF-α) coupled with surface activation markers (CD69, CD25)
- Compound screening in primary human cell systems—enabling multiplexed readouts of cytotoxicity, target engagement, and downstream pathway modulation
FAQ
Does the easyCyte 6-2L require sheath fluid or daily fluidic calibration?
No. It uses a closed-loop microcapillary system with fixed volumetric sampling—eliminating sheath fluid, pressure regulators, and daily alignment.
Can I import custom compensation matrices from other platforms?
Yes. InCyte accepts FCS 3.0/3.1 files and allows manual entry of spillover coefficients for cross-platform method transfer.
Is the system compatible with regulatory submissions (e.g., IND, BLA)?
When deployed with validated protocols and 21 CFR Part 11–enabled InCyte configuration, raw FCS files and audit logs are admissible as primary data in regulatory filings.
What is the maximum sample throughput per hour?
Up to 60 samples/hour with automated tube loading and <15-second acquisition per tube at 1,000–5,000 events/sec.
Does it support bead-based assays such as cytokine capture or phospho-standard calibration?
Yes—InCyte includes dedicated modules for bead event discrimination, MFI normalization, and standard curve interpolation using reference beads.
