Keebio Keebio-5000PRO Automated Microplate Reader

Overview

The Keebio Keebio-5000PRO Automated Microplate Reader is a high-performance, fully integrated absorbance-based detection platform engineered for precision quantification in enzyme-linked immunoassays (ELISA), protein assays, nucleic acid analysis, cell viability studies, and microbial growth monitoring. Operating on the principle of ultraviolet–visible (UV-Vis) spectrophotometry, the instrument employs a high-resolution grating monochromator with 0.1-nm wavelength stepping across a broad spectral range (190–1100 nm), eliminating reliance on fixed optical filters and enabling flexible method development without hardware reconfiguration. Its dual-capability design supports both standard microplate reading and standalone cuvette-based measurements—functioning equivalently to a benchtop UV-Vis spectrophotometer when required. The system integrates on-board temperature-controlled incubation (up to 45°C, ±0.5°C uniformity at 37°C) and programmable linear shaking, permitting kinetic assays with controlled thermal and mixing conditions directly within the reader. This architecture reduces inter-instrument variability and minimizes manual handling, supporting reproducible, walk-away operation in regulated and non-regulated laboratory environments.

Key Features

• Grating-based monochromator delivering continuous wavelength selection from 190 to 1100 nm with 0.1-nm resolution—ideal for spectral scanning, peak identification, and multiplexed absorbance assays.
• Fully automated workflow: auto-loading detection, plate recognition, wavelength selection, incubation control, shaking activation, and data acquisition—all managed via intuitive 10-inch capacitive touchscreen interface.
• On-board incubation module with precise thermal regulation (ambient +5°C to 45°C) and validated uniformity (±0.5°C across 96-well footprint at 37°C), enabling real-time kinetic ELISA and cell-based assays.
• High-speed readout engine: completes full 96-well plate measurement in ≤10 seconds and 384-well plates in ≤20 seconds—optimized for high-throughput screening and time-resolved experiments.
• Dual-format compatibility: supports ANSI/SLAS-standard 96-well and 384-well microplates as well as 1-cm pathlength cuvettes, extending utility beyond plate-based workflows into traditional spectrophotometric applications.
• Linear orbital shaking with three programmable intensity levels ensures homogeneous sample mixing prior to and during kinetic reads—critical for suspension-based assays and antigen-antibody binding kinetics.

Sample Compatibility & Compliance

The Keebio-5000PRO is validated for use with common biological sample matrices including serum, plasma, cell lysates, culture supernatants, food extracts, and environmental water samples. Its optical performance meets key industry benchmarks: stray light ≤0.05% at 220 nm ensures reliable low-absorbance quantitation (e.g., dsDNA at 260 nm); wavelength accuracy ±0.5 nm and repeatability ≤0.2 nm support compliance with ISO 8466-1 (calibration of spectrophotometers) and ASTM E275 (standard practices for UV-Vis spectrophotometry). While not pre-certified for FDA 21 CFR Part 11, the instrument’s audit-trail-ready software architecture—including user access control, electronic signatures, and immutable data logging—enables laboratories to configure it for GLP and GMP-aligned workflows upon validation. It conforms to IEC 61010-1 safety standards and electromagnetic compatibility (EMC) requirements per EN 61326-1.

Software & Data Management

The bundled Keebio Analysis Suite provides a modular, Windows-based application for assay configuration, real-time monitoring, and advanced data reduction. Users can define custom protocols—including multi-wavelength endpoint reads, time-course kinetic runs, and full-spectrum scans—with automatic background subtraction, curve fitting (linear, 4PL, 5PL), and concentration interpolation. Raw absorbance data are stored in vendor-neutral CSV and XML formats; all processing steps—including dilution factors, standard curve parameters, and QC flagging—are embedded in metadata. The software supports LIMS integration via ASCII file export and includes built-in report templates compliant with ISO/IEC 17025 documentation requirements. Audit trails record operator ID, timestamp, parameter changes, and result modifications—essential for internal quality audits and regulatory submissions.

Applications

• Quantitative ELISA and competitive immunoassays across infectious disease, oncology, and endocrinology research.
• Nucleic acid quantification (A260/A280 ratios), protein concentration determination (Bradford, BCA, Lowry), and enzymatic activity assays (e.g., LDH, ALP, β-galactosidase).
• Cell proliferation and cytotoxicity assays (MTT, XTT, resazurin), microbial growth kinetics, and antimicrobial susceptibility testing.
• Food safety testing (mycotoxin detection, pesticide residue screening) and environmental monitoring (nitrate, phosphate, heavy metal chelation assays).
• Method development and validation in QC/QA labs requiring traceable, repeatable absorbance measurements across diverse sample types and plate formats.

FAQ

Does the Keebio-5000PRO support kinetic assays with on-board incubation and shaking?
Yes—it features programmable temperature control (up to 45°C) and linear shaking with three speed settings, allowing full kinetic profiling without external equipment.
Can this instrument be used for cuvette-based measurements?
Yes—the system includes a dedicated cuvette port compatible with standard 1-cm pathlength quartz or glass cuvettes, enabling traditional spectrophotometric applications.
Is wavelength calibration traceable to NIST standards?
The monochromator is factory-calibrated using certified holmium oxide and didymium filters; users may perform verification per ISO 8466-1 using supplied reference standards.
What data security and audit capabilities does the software provide?
The Keebio Analysis Suite logs all user actions, parameter edits, and result exports with timestamps and operator IDs; full audit trail export is supported in CSV format for regulatory review.
How is maintenance performed for optical alignment and lamp replacement?
The xenon flash lamp is field-replaceable with no optical recalibration required; routine cleaning of the plate carrier and detector window is recommended every 6 months per the maintenance schedule.