GS-800™ Calibrated Densitometer


Discontinued Product
The GS-800 system has been replaced by the new GS-900™ calibrated densitometer. However, we will continue to provide support for customers with GS-800 units.


The GS-800™ calibrated densitometer offers superior accuracy, sensitivity, and data reproducibility. It automatically self-calibrates the optical density to optimize detection.

Features include:

  • Transmissive and reflective imaging using red, green, and blue CCD technology to scan chromogenic samples at the optimal detection wavelength
  • Imaging of a wide variety of samples such as 1-D and 2-D gels, colorimetric dot and slot blots, film-based chemiluminescent blots, autoradiograms, slides, and photographs
  • IQ/OQ for verification of the reflectance and transmittance calibration functions
  • High resolution and analysis of closest bands on a gel due to 12-bit precision and 36.3 μm resolution
  • Scanning of larger gels for enhanced separation of proteins on oversized 29 x 40 cm sample platen
  • Accurate quantitation of samples, such as Coomassie Blue– and silver-stained gels, over a large dynamic range (0–3.0 OD)
  • Sealed imaging platen to accommodate wet samples of variable thickness
  • Purity analysis and lane background tools for manufacturing QC

Transmittance and Reflectance

Unlike laser densitometer systems, the GS-800 calibrated densitometer has both transmittance and true reflectance capabilities that allow accurate scans of both transparent and opaque samples. The advantage of true reflectance scanning is accurate detection and analysis of molecules on the surface of membranes, rather than molecules distributed throughout the membrane matrix. True reflectance provides the most accurate detection and analysis of dot blots, slot blots, and other electrophoretic blots without quantitation error.


The calibration of the GS-800 calibrated densitometer can be validated by following GS-800 IQ/OQ protocols. These protocols are available as an accessory to the GS-800 densitometer. The easy-to-follow protocols include instructions for installation of the hardware and software and for verification of the calibration functions.

CFR Module

The GS-800 densitometer can be used in a GMP/GLP-compliant environment. The CFR module assists users with meeting U.S. FDA 21 CFR Part 11 requirements.

Light source Fluorescent white
Wavelength 400–750 nm
Absorbance range 0–3.0 OD (transmissive); 0–2.0 RD (reflective)
Operating modes Transmissive and reflective
Scanning area Transmissive 29 x 40 cm; reflective 30 x 40 cm
Sampling rate 800 x 1,600 dpi
Pixel density 12-bit
Resolution 36.3 µm
Operating system compatibility Windows XP and 2000; analysis can be done using Mac OS X as well
Dimensions (W x D x H) 62.6 x 47.3 x 19.3 cm (24.6 x 18.6 x 7.6")
Weight 20.8 kg (45.9 lb)

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 

Molecular Imager GS-800 USB Calibrated Densitometer

100/240 V, PC, includes Quantity One® 1-D analysis software (#170-9600)

List Price:
Your Price:

Communication error

Reload Page

Your Price:   Log in
Quantity:   Add to cart
Add to Hot List   Add to Quote
Number Description Options
6126 Imaging Systems, Computer Specifications, Rev E Click to download
5888 Bio-Rad Imaging Systems Family Brochure, Rev E Click to download [ Add to Cart (Free) ]
2596 GS-800™ Calibrated Densitometer Flier, Rev B (Discontinued Product) Click to download
M4000188 Instruction Manual, Model GS-800™ SCSI Calibrated Imaging Densitometer User Guide, Rev B (Discontinued Product) Click to download
4000126-14 Instruction Manual, The Discovery Series: Quantity One 1-D Analysis Software, Rev A Click to download
4000129-14 Instruction Manual, The Discovery Series: PDQuest 2-D Analysis Software, Rev A Click to download
3097 Imaging and Analysis: Tools for Acquisition and Analysis of Protein Expression Data Brochure, Rev B Click to download [ Add to Cart (Free) ]
6147 Robust Transfer of Proteins to Membranes Across a Wide Range of pI and Mass Using the Trans-Blot Turbo System, Rev B Click to download [ Add to Cart (Free) ]