VersaMax ELISAMicroplate Reader

A powerful, affordable catalyst for scientific accomplishment

Make the most of your budget with the VersaMax™ ELISA Microplate Reader, our affordable, visible spectrum absorbance reader for 96-well microplates. This richly featured reader gives you the speed, convenience, and economy of monochromator-based wavelength selection for visible absorbance measurements between 340 nm and 850 nm, so you can accomplish more, with less.

  • Overview
  • Applications
  • Software
  • Specifications
  • Resources
  • Eliminate the need for purchasing and changing out filters for wavelength optimization with a monochromator-based wavelength selection for visible absorbance between 340 nm and 850 nm
  • Read up to 2 wavelengths in endpoint or kinetic mode for 96-well plates
  • Report results with confidence: Patented multichannel optical design mimics a dual-beam spectrophotometer, measures each sample in the plate directly, and eliminates error due to variations in light output between optical fibers on other instruments
  • Monitor temperature-sensitive reactions with consistent temperature regulation from ambient to 45°C
  • Mix samples thoroughly in microplate wells with user-programmable Automix feature
  • Analyze data using SoftMax® Pro Software comprehensive data analysis software
  • Automate seamlessly with the StakMax® Microplate Handling Stacker

Microplate Reader Validation

  • Comprehensive validation toolset available includes:
    • SpectraTest® ABS1, FL1, and LM1 Validation Plates for hardware validation of absorbance, fluorescence, and luminescence modes,
    • SoftMax Pro Software validation package
    • Software tools for FDA 21 CFR Part 11 compliance
The VersaMax Microplate Reader supports a multitude of absorbance assay categories including:

  • Cell viability, proliferation, and cytotoxicity
  • ELISAs and immunoassays
  • Endotoxin detection
  • Enzyme assays
  • Protein quantitation
  • Microbial growth
  • Phosphotases/kinases
  • Reporter gene assays

SoftMax Pro Software simplifies setting up your assays by providing:

  • Simple set-up and automatic instrument recognition
  • Pre-defined protocols for endpoint and kinetic ELISA protein plus quantification assays such as Bradford, Lowry, BCA, and DC protein assays
  • A wide variety of scan types: Endpoint, Kinetic, Spectrum* and Well Scanning*
  • Standard data reduction settings are preselected as default
  • Automatic data recovery feature




SoftMax Pro Software offers a variety of customizing options:

  • Predefined calculation options for common data analysis functions
  • Automatic export to Microsoft Excel
  • Instrument settings and plate read area can be adjusted to suit your experiment’s needs
  • Custom data reduction settings can be selected for optimal signal selection
  • Full reports, with font flexibility, and live mini-tables and graphs are now available within the Notes section to simplify the result sharing experience
  • Contemporary user community enabling protocol exchange and expertise sharing among our numerous users


  • Proven integration with leading automation and LIMS platforms for partnered solutions
  • Optional tools for regulated labs with SoftMax Pro GxP Compliance Software

* available in select instrument models

General Specifications
Dimensions (in.) 8.6 (h) x 22.8 (w) x 15 (d)
Dimensions (cm) 22 (h) x 58 (w) x 38 (d
Weight 30 lb (13.6 kg)
Power Source 90-250 VAC, 50/60 Hz
Performance Specifications
Wavelength Range 340-850 nm
Wavelength Selection Monochromator, tunable in 1-nm increments
Wavelength Bandwidth ≤ 2.0 nm full width half maximum
Wavelength Accuracy ± 1.0 nm across wavelength range
Wavelength Repeatability ± 0.2 nm across all optical channels
Photometric Range 0.000 to 4.000 OD
Photometric Resolution 0.001 OD
Photometric Accuracy/linearity <± 1.0% and ± 0.006 OD, 0.0-2.0 OD
Photometric Precision <± 1.0% and ± 0.003 OD, 0.0-2.0 OD
Stray Light ≤ 0.07% at 340 nm
OD ≥ 3.15
Light Source Xenon Flash Lamp
Microplate Read Time – Endpoint 9 seconds
Microplate Read Time – Kinetic 9-second minimum interval
Temperature Range Ambient + 4 °C, to 45 °C
Temperature Uniformity ±0.5 °C @ 37 °C well-to-well