Allsheng Feyond-A500 Multimode Microplate Reader

Overview

The Allsheng Feyond-A500 Multimode Microplate Reader is an integrated, standalone benchtop instrument engineered for high-throughput and high-fidelity detection across five core assay modalities: absorbance (ABS), fluorescence intensity (FI), chemiluminescence (CL), time-resolved fluorescence (TRF), and fluorescence polarization (FP). Its optical architecture employs a monochromator-based absorbance pathway—eliminating the need for fixed filters—and delivers continuous spectral scanning from 200 to 1000 nm with 1 nm resolution, ensuring compliance with ASTM E308 and ISO 17025 requirements for wavelength accuracy and photometric linearity. For fluorescence and TRF measurements, the system utilizes a filter-based top-read optical path featuring xenon flash lamp excitation, high-transmission dichroic mirrors, and low-noise photomultiplier tube (PMT) detection. This configuration enables optimal signal-to-noise ratio across diverse fluorophores—including lanthanide chelates—and supports kinetic assays requiring sub-second temporal resolution. The Feyond-A500 meets essential regulatory expectations for life science instrumentation, including traceable calibration routines, onboard self-diagnostics (light source, detector, position, and optical alignment), and hardware-level temperature uniformity control—critical for reproducible cell-based and enzymatic assays under GLP or early-stage GMP-aligned workflows.

Key Features

• Monochromator-driven absorbance detection with ±2 nm wavelength accuracy and <2.5 nm FWHM bandwidth, supporting spectral scanning, endpoint, and kinetic protocols without filter replacement.
• Dual-zone PID incubation (25–45 °C, ±0.5 °C) mitigates edge effects in microplates by independently regulating top and bottom plate surfaces—essential for extended kinetic assays involving adherent cells or thermally sensitive enzymes.
• Modular, barcode-scannable filter cartridges enable rapid, error-free exchange of excitation/emission filter pairs; each module auto-identifies its optical specifications upon insertion.
• 10-inch motorized touchscreen interface allows full instrument control—including protocol upload, parameter adjustment, real-time data visualization, and onboard analysis—without external PC dependency.
• Integrated dual-channel programmable injector supports precise reagent addition during kinetic runs on 96- and 384-well plates, with volume accuracy ±2% across 5–500 µL range.
• Automated PMT gain optimization dynamically adjusts detector voltage based on sample signal intensity, extending linear dynamic range while eliminating manual gain calibration steps.

Sample Compatibility & Compliance

The Feyond-A500 accommodates standard ANSI/SLAS-format microplates (6–384-well), opaque white/black plates for luminescence and fluorescence, and transparent polystyrene/cyclo-olefin plates for absorbance. Its optical design minimizes well-to-well crosstalk (<0.005% in CL mode) via optimized fiber-optic light collection geometry and spatially isolated detection paths. Regulatory readiness is embedded in both hardware and firmware: automatic calibration logs are timestamped and stored with user ID; all critical parameters (lamp usage hours, filter IDs, temperature profiles) are retained for audit review. Optional ReaderLT-I PC software provides 21 CFR Part 11-compliant electronic signatures, role-based access control, and full audit trail functionality—aligning with FDA-recognized validation frameworks for QC laboratories and contract research organizations.

Software & Data Management

Onboard firmware includes a comprehensive analytical engine supporting 4-parameter logistic (4PL), 5-parameter logistic (5PL), linear, and quadratic curve fitting; kinetic slope calculation; delta-absorbance trending; and ratiometric analysis (e.g., FRET, dual-emission FP). Raw data export is available in CSV, Excel (.xlsx), and XML formats, preserving metadata (wavelengths, integration times, gain settings, plate maps). QR code integration allows one-touch import of preconfigured protocols or calibration curves—reducing setup errors and accelerating method transfer between instruments. For centralized data governance, ReaderLT-I software extends capabilities to batch processing, statistical outlier detection (Dixon’s Q-test), and report generation compliant with ISO/IEC 17025 documentation standards.

Applications

The Feyond-A500 serves as a primary detection platform in academic, pharmaceutical, and clinical research settings. Its TRF capability enables ultrasensitive immunoassays for biomarkers such as cardiac troponin I or hepatitis B surface antigen (HBsAg), achieving sub-picomolar LODs without wash steps. FP mode supports real-time monitoring of small-molecule binding events—e.g., kinase inhibitor screening against fluorescently labeled ATP analogs—or protein-protein interactions using labeled peptide substrates. Chemiluminescent detection meets requirements for luciferase reporter gene assays (e.g., NF-κB activation) and ELISA-based cytokine quantification, leveraging six-decade dynamic range to avoid sample dilution. Absorbance scanning facilitates nucleic acid purity assessment (A260/A280), enzyme activity profiling (NADH/NADPH kinetics), and microbial growth monitoring (OD600) with traceable photometric performance.

FAQ

Does the Feyond-A500 support FDA 21 CFR Part 11 compliance?

Yes—when used with optional ReaderLT-I software, the system provides electronic signature capability, audit trail logging, and user access controls aligned with Part 11 Annex A expectations.

Can I perform simultaneous dual-wavelength absorbance measurements?

No—the monochromator operates sequentially; however, rapid wavelength switching (<100 ms) enables quasi-simultaneous dual-band acquisition for ratiometric applications like pH-sensitive dyes.

Is the incubation chamber compatible with gas-controlled environments?

Not natively—the current design supports ambient air incubation only. For CO₂-dependent cell assays, external humidified chambers or plate sealers are recommended.

What maintenance is required for the xenon flash lamp?

The lamp is rated for ≥1×10⁹ flashes; no routine replacement is needed within typical 3–5 year service intervals. Automatic intensity monitoring triggers alerts when output drops below 90% of baseline.

How does the instrument handle plate barcode reading for sample tracking?

It reads standard 1D/2D plate barcodes (Code 128, QR) to auto-populate plate IDs in run logs and link results to LIMS identifiers—supporting ALCOA+ data integrity principles.