SpectraMax MiniMax 300 Imaging Cytometer

Observe the viability of your cells with the field-upgradeable cellular imaging option for the SpectraMax i3/i3x Multi-mode Detection Platform

See more, and do more, with the SpectraMax® i3/i3x Multi-Mode Detection Platform, the field-upgradeable SpectraMax® MiniMax™ 300 Imaging Cytometer enables quick imaging and analysis of cells and gives you a front-row view of phenotypic changes that accompany cytotoxicity, cell proliferation, and protein expression. Now with StainFree™ Cell counting Technology, additional brightfield analysis features, and fluorescent green and red detection channels.

The SpectraMax MiniMax 300 Imaging Cytometer option is a field-upgradeable option for the SpectraMax i3/i3x Multi-Mode Detection Platform  that offers cellular imaging capability.

  • Simplified workflow: Add cellular imaging assays in a small footprint
  • No Stain Analysis: Eliminate cell staining for cell counting and confluence measurements using StainFree™ Technology
  • More data: Multi-parametric cell-based assays with brightfield and green and red fluorescent imaging
  • Familiar software: Set up, image, and analyze cells in a snap using SoftMax® Pro Microplate Data Acquisition & Analysis Software
  • Higher sensitivity: Easily measure low cell concentration samples
  • Lower variance: Normalize your plate reader assay data to the number of cells in each well

Needs validation: The SpectraMax MiniMax 300 Imaging Cytometer supports a multitude of absorbance assay categories including:

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

Cell Count/Viability

  • CHO cells were plated in 2X dilutions starting from 32000 cells/well in a 96-well plate
  • Cells were then stained with Calcein AM dye and counted


Top: The cell counting module of the SoftMax Pro Software MiniMax Imaging Edition displays segmentation mask of the image (left), selected cell-by-cell measurements (middle), and a histogram of objects by average intensity (right). Bottom: The software allows user to graph cell counts of serially diluted CHO cells.

Cell Proliferation/Cytotoxicity

  • Hepatocytes were treated with known compounds causing liver toxicity
  • Proliferation/toxicity effects assessed by measuring total cell area


Top: Heat map of hepatotixicity experiment demonstrating dose-wise response to four compounds (blue - low area cells; red - high area cells). Bottom: After image analysis, the software plots results and fits the curves to determine IC50s (red - aflatoxin 1; green - aflatoxin 4; blue - staurosporine; purple - mitomycin C). iCell Hepatocytes from Cellular Dynamics International.

Marker Expression

  • HUVEC cells were pre-treated with anti-inflammatory compounds and then cultured in the presence of inflammatory cytokines
  • Stimulated protein expression was measured by total integrated intensity


Top: Expression of VCAM protein on cells activated by inflammatory cytokines. Bottom: Total integrated intensity of adhesion molecules expressed in the presence of anti-inflammatory compounds (blue - SB202190; red - SB203580).


Technical Specifications

Light source Proprietary solid state illumination, White, 460/20 nm and 625/20 nm excitation
Detector 1.25 megapixel, 12-bit high sensitivity CCD camera
Emission Brightfield; Green 541/108 nm; Red 713/123 nm
Objective Single 4X objective
Autofocus Proprietary laser scanning autofocus
Resolution 1.9 μm x 1.9 μm pixel size
Data acquisition and analysis software SoftMax® Pro Software MiniMax Imaging Edition
Imaging Speed* Acquisition Acquisition + Analysis
1 color - 96 wells 3:40 6:30
2 color - 96 wells 3:40 6:30
Specimen carriers ANSI/SBS-conformant microplates,
96 and 384 wells
Dimensions (cm) 39.2 cm W x 19.5 cm H x 60.6 cm D (SpectraMax® MiniMax™ 300 Imaging Cytometer) 
39.2 W x 44.0 H x 60.6 L
(with base system)

* Using single site acquisition with 10 ms exposure time.

The SpectraMax MiniMax 300 Imaging Cytometer is a field-upgradable option to the SpectraMax i3 Multi-Mode Detection Platform. It can be purchased together with the SpectraMax i3 base system or added separately should your application needs expand in the future.

SpectraMax® MiniMax™ 300 Imaging Cytometer


Part Number

SpectraMax MiniMax 300 Imaging Cytometer
SpectraMax MiniMax 300 Desktop Computer
SpectraMax MiniMax 300 22" Monitor
SpectraMax i3x Multi-Mode Detection Platform