Molecular Imager® Gel Doc™ XR System


The Gel Doc XR+ system enables quick and easy visualization, documentation, and analysis of nucleic acid and protein gels, blots, and macroarrays with a few clicks of the mouse. The system supports fluorescence and colorimetric detection methods. The system enables educators and students to:

  • Increase cloning efficiency and protein production by protecting DNA electrophoresis samples from UV exposure using the XcitaBlue™ Conversion Screen and blue light excitable stains such as GelGreen, SYBR®Safe, and SYBR® Green I
  • View protein gels stained with Coomassie Blue, silver stain, and other colorimetric gel stains using the White Light Conversion Screen
  • Maintain prior lab protocols as there is no loss in sensitivity compared to UV and ethidium bromide staining

The Molecular Imager Gel Doc XR+ system incorporates high-resolution, high-sensitivity CCD detection technology and modular options to accommodate a wide range of samples and support multiple detection methods including fluorescence and densitometry. The system is controlled by Image Lab™ Software to optimize imager performance for fast, integrated, and automated image capture and analysis of various samples.

The system accommodates a wide array of samples, from large handcast polyacrylamide gels to small ReadyAgarose™ Precast Gels and various blots. The system is an ideal accompaniment to PCR, purification, and electrophoresis systems, enabling image analysis and documentation of restriction digests, amplified nucleic acids, genetic fingerprinting, RFLPs, and protein purification and characterization.

Features and Benefits of the Gel Doc XR+ System

  • Gel and blot imaging and analysis are quick and accurate
  • Easy to use; very little to no training is required for your students to capture amazing images
  • Save and recall all steps for repeatable and reproducible results from class to class
  • Optimize the system at setup for image data that is always accurate, reproducible, and free of imaging artifacts
  • Wide range of applications with special accessories to preserve sample integrity for downstream research while ensuring user safety
  • Comprehensive, automated quantitative analysis of protein and DNA samples in seconds
  • Customize and organize data in reports
  • Obtain publication-quality results quickly

The Gel Doc XR+ system optimizes reproducibility and reliability of experimental data, enabling quantitative comparisons between different experiments. Using proprietary algorithms, this imaging system is calibrated at setup to ensure:

  • Images are in focus at all times, regardless of zoom level or sample position
  • Appropriate flat fielding correction is automatically and consistently applied to image data for every application
  • Imaging artifacts are automatically corrected

The Gel Doc XR+ System consists of a darkroom hood, CCD camera and software-controlled motorized lens, UV and white light illuminators, filter slider with standard filter, and UV-protection shield.

Related Products

Chemiluminescence No
Fluorescence Yes
Note: Use the optional XcitaBlue kit if performing SYBR® Safe DNA applications, because the UV to blue conversion screen allows you to visualize DNA samples while protecting against UV damage.
Colorimetry/densitometry Yes
Gel documentation Yes
Hardware Specifications  
Maximum sample size 28 x 36 cm
Maximum image area 19.4 x 26 cm
Excitation source Epi-white light and trans-UV (302 nm) are standard (optional 365 nm lamp available); optional trans-white conversion screen and XcitaBlue™ UV/blue conversion screen available
Illumination control 3 modes (trans-UV, trans white, epi-white)
Detector CCD
Image resolution 4 megapixels
Pixel size (H x V)  4.65 x 4.65 µm
Filter holder 3 positions (2 for filters, 1 without filter)
Emission filters 1 included (standard), 3 optional
Dynamic range >3.0 orders of magnitude
Pixel density (gray levels) 4,096
Dynamic flat fielding Application specific, for all applications
Instrument size (L x W x H) 36 x 60 x 96 cm
Instrument weight 32 kg
Operating Ranges  
Operating voltage 110/115/230 V AC nominal
Operating temperature 10–28°C (21°C recommended)
Operating humidity <70% noncondensing
Automation Capabilities  
Workflow automated selection Application driven; user selected or recalled by a protocol
Workflow automated execution Controlled by a protocol via application specific setup for image area, illumination source, filter, analysis, and reporting
Workflow reproducibility 100% repeatability via recallable protocols; from image capture to quantitative analysis and reports
Autofocus (patent pending) Precalibrated focus for any zoom setting or sample height
Image flat fielding** Dynamic; precalibrated and optimized per application
**U. S. patent 5,951,838.
Auto-exposure 2 user-defined modes (intense or faint bands)

Account price failed to display. Please try reloading the page. Reload Page

If you are placing an order, you may proceed with your order; the account price will be applied if it is lower than the
list price. If the problem persists, please call customer service at   or send an
email to 

Waste Electrical and Electronic Equipment ("WEEE Directive")

This product contains electrical or electronic material. Learn more about Bio-Rad's EU Recycle Program

Waste Electrical and Electronic Equipment ("WEEE Directive")

This product contains electrical or electronic material. Learn more about Bio-Rad's EU Recycle Program

Waste Electrical and Electronic Equipment ("WEEE Directive")

This product contains electrical or electronic material. Learn more about Bio-Rad's EU Recycle Program

Molecular Imager® Gel Doc™ XR+ System

Gel imaging system, includes universal hood, UV transilluminator, epi-white illumination, camera, cables, Image Lab™ software compatible with Windows or Mac OS; education use only

List Price:
Your Price:

Communication error

Reload Page

EDU Price:   Inquire   What is this?
Quantity:   Add to Cart
Add to Hot List   Add to Quote
White Light Conversion Screen
White Light Conversion Screen

Pkg of 1, conversion screen for viewing Coomassie, Silver Stain, and other colorimetric gel stains; for use with the Gel Doc™ XR+, non touch–screen ChemiDoc™ MP, and ChemiDoc™ XRS+ Systems; education use only

List Price:
Your Price:

Communication error

Reload Page

EDU Price:   $473.60   What is this?
Quantity:   Add to Cart
Add to Hot List   Add to Quote
(Discontinued) White Light Transilluminator

Pkg of 1, for viewing Fast Blast stained DNA or Coomassie stained proteins, viewing surface 21 x 31 cm, lays flat in universal hood of Gel Doc™ XR+ and ChemiDoc™ XRS+ systems; education use only

This product is no longer available. Please contact technical support for more information on replacement product.
Number Description Options
4000129-14 Instruction Manual, The Discovery Series: PDQuest 2-D Analysis Software, Rev A Click to download
4000126-14 Instruction Manual, The Discovery Series: Quantity One 1-D Analysis Software, Rev A Click to download
2577 Instruction Manual, Molecular Imager Gel Doc XR and ChemiDoc XRS Systems Installation Guide, Rev B Click to download
4000177 Instruction Manual, IPD Multi-Color Imaging Target, Rev A Click to download
2589 Not All Bits Are Created Equal Click to download
2972 Molecular Imager Gel Documentation Systems Brochure, Rev G Click to download