Thermo Scientific Varioskan LUX Multimode Microplate Reader
| Brand | Thermo Fisher |
|---|---|
| Origin | Shanghai, China |
| Model | Varioskan LUX |
| Detection Technologies | Absorbance, Fluorescence Intensity (FI), Luminescence, AlphaScreen/AlphaLISA, Time-Resolved Fluorescence (TRF/TR-FRET) |
| Light Source | Xenon Flash Lamp |
| Detection Mode | Top & Bottom Reading |
| Plate Formats | 6–1536-well (Abs: 6–384-well) |
| Wavelength Range | Abs 200–1000 nm |
| Spectral Scan Speed | <2.2 sec/plate (400–500 nm, 2 nm step) |
| Dynamic Range | FI (Top) >6 decades, FI (Bottom) >5.5 decades, Luminescence >7 decades |
| Sensitivity | FI (Top): <0.4 fmol fluorescein/well (black 384-well) |
| Luminescence | <7 amol ATP/well (white 384-well) |
| Accuracy | ±2% or 0.003 Abs (200–399 nm, 0–2 Abs) |
| Linearity | ±2% (96-well, 0–4 Abs at 450 nm) |
| Precision | CV <0.5% (450 nm, 0–3 Abs) |
| Incubation | Up to 45°C |
| Integrated Gas Control Module | CO₂ & O₂ regulation |
| Read Modes | Endpoint, Kinetic, Spectral, Kinetic Spectral, Multi-point |
| Software | Thermo Scientific SkanIt Software (Research & Pharma Editions, 21 CFR Part 11 compliant) |
| Certifications | Cisbio HTRF™ Certified, Promega DLReady™ Certified |
| Dimensions (W×D×H) | 53×58×51 cm |
| Weight | 56 kg |
Overview
The Thermo Scientific Varioskan LUX Multimode Microplate Reader is a high-performance, modular benchtop instrument engineered for precision and reproducibility in quantitative life science assays. It employs dual optical architectures—dual monochromators for absorbance and spectral scanning, and independent excitation/emission monochromators for fluorescence intensity—to deliver flexible, interference-free wavelength selection across broad spectral ranges (200–1000 nm for absorbance and excitation; 270–840 nm for emission). Its xenon flash lamp provides stable, low-heat pulsed illumination ideal for kinetic and photolabile assays. The system supports five core detection modalities: absorbance (UV-Vis), fluorescence intensity (including FRET), luminescence (direct and filter-based), AlphaScreen/AlphaLISA, and time-resolved fluorescence (TRF and TR-FRET)—all within a single platform. Designed for rigorous academic, pharmaceutical, and biotechnology laboratories, the Varioskan LUX integrates hardware-level automation with software-driven assay optimization, enabling robust data acquisition under GLP, GMP, and FDA 21 CFR Part 11-compliant workflows.
Key Features
- Modular, field-upgradeable architecture supporting optional gas control (CO₂/O₂), temperature incubation (up to 45°C), and automated liquid handling integration.
- Intelligent auto-gain adjustment dynamically optimizes detector gain per well based on signal intensity—eliminating manual range selection and minimizing saturation or noise floor limitations.
- Dual reading capability (top and bottom) ensures compatibility with diverse microplate formats—including opaque, clear-bottom, and cell-culture plates—for heterogeneous assay formats such as cell-based luciferase reporters or adherent-cell TR-FRET.
- Integrated gas control module enables physiologically relevant hypoxia or normoxia conditions during real-time kinetic measurements—critical for metabolic, signaling, and viability assays.
- Real-time spectral scanning (<2.2 sec/plate over 400–500 nm, 2 nm steps) and simultaneous dispensing-read capability allow monitoring of rapid enzymatic or binding kinetics from t = 0 s.
- Self-calibrating optics and automated system diagnostics ensure long-term measurement stability and reduce operator-dependent variability across shifts and users.
Sample Compatibility & Compliance
The Varioskan LUX accommodates standard microplate formats from 6- to 1536-well (absorbance up to 384-well), including black, white, clear, and specialized low-volume plates. Its bottom-reading optics support adherent-cell assays in transparent-bottom plates, while top-reading mode delivers optimal sensitivity for suspension-based luminescent or fluorescent reporters. The instrument meets international regulatory expectations: it is certified by Cisbio Bioassays for HTRF™ applications and validated by Promega Corporation for DLReady™ compatibility—ensuring reliable performance in ligand-binding, kinase, and GPCR screening. For regulated environments, the SkanIt Pharma Edition includes full 21 CFR Part 11 compliance features: electronic signatures, audit trails, role-based access control, and immutable data archiving. All firmware and calibration logs are timestamped and user-attributed, satisfying GLP/GMP documentation requirements.
Software & Data Management
SkanIt Software provides a unified interface for protocol design, real-time monitoring, and post-acquisition analysis—without installation restrictions: each authorized user may install the software locally on any Windows PC. Its virtual pipetting tool simplifies plate layout definition, especially for complex multi-condition screens. Data are written continuously to a local SQLite database, preventing loss during power failure or unexpected termination. Built-in analysis modules support blank subtraction, SD/CV% calculation, 4-/5-parameter logistic curve fitting, dose-response modeling, QC flagging (e.g., Z’-factor, signal-to-background), kinetic rate derivation, spectral deconvolution, and custom formula scripting. Export options include .xlsx (with raw + processed data), .pdf (formatted reports), .xml (for LIMS integration), and .txt (ASCII-compatible). Email auto-notification and scheduled report delivery further streamline workflow continuity across distributed teams.
Applications
The Varioskan LUX serves as a central analytical node in diverse research domains: enzyme kinetics (e.g., protease or phosphatase activity via absorbance or fluorescence), receptor-ligand binding (HTRF/TR-FRET), cellular toxicity and proliferation (MTT, resazurin, caspase assays), gene reporter studies (luciferase, GFP), protein-protein interaction screening (AlphaLISA), and high-content secondary assays in hit validation. Its wide dynamic range (>7 decades in luminescence) and sub-femtomole sensitivity make it suitable for low-abundance biomarker detection in ELISA and immunoassay development. In bioprocess development, integrated gas control supports real-time monitoring of mitochondrial function or glycolytic flux in cultured cells under controlled O₂ tension.
FAQ
Is the Varioskan LUX compatible with third-party microplates and assay kits?
Yes—it accepts all ANSI/SLAS-standard microplates and is validated for use with commercial assay kits from leading suppliers including PerkinElmer, Promega, Cisbio, and R&D Systems.
Does the instrument support kinetic measurements with temperature and gas control active simultaneously?
Yes—temperature incubation (up to 45°C) and CO₂/O₂ modulation operate concurrently during kinetic read cycles without compromising timing accuracy or thermal uniformity.
Can SkanIt Software be deployed in a networked environment with centralized license management?
Yes—the Enterprise License option supports concurrent user licensing, remote software updates, and centralized configuration templates across laboratory networks.
What validation documentation is provided for IQ/OQ/PQ protocols?
Thermo Fisher supplies comprehensive qualification guides, test scripts, and factory-verified calibration certificates aligned with ISO/IEC 17025 and ASTM E2597 standards.
Is service and technical support available globally?
Yes—Thermo Fisher maintains certified service engineers and application specialists across North America, EMEA, and APAC regions, with multilingual remote diagnostics and on-site support contracts available.
