MD Spectra Max Gemini XS

Item: 4293F READER


All products ship from our 30,000 sq. ft. Haverhill, MA warehouse

Contact Us

Call 978-521-2221
to request information & pricing for item 4293F READER

90-Day Warranty

American Instrument Exchange
Contact us for all your used lab equipment needs

1023 Western Ave.
Haverhill, MA 01832

Phone: 978-521-2221
Fax: 978-521-8822


Shipping Policy

Molecular Devices SpectraMax Gemini XS

  • Temperature range: 4°C above ambient to 45°C
  • Digital controller and display
  • Sold as-is

The Molecular Devices SpectraMax Gemini XS spectrofluorometer can detect signals either from fluorescence or luminescence based assays. The SpectraMax Gemini XS has all the features of a standard microplate reader (temperature control, shaker, etc.) as well as two monochromators to select desired wavelengths – this means that you won’t have to purchase or swap out filters, and that you can set the reader in 1nm increments. The SpectraMax Gemini XS can be used for both fluorescence and luminescence based assays. Along with the multi-well plate tray, this feature makes the Gemini XS one of the most versatile spectrophotometers on the market today. Applications include cellular and molecular binding studies, DNA quantitation, drug screening, and SNP genotyping analysis. Features include:

Dual Monochromators — The right pair of excitation and emission wavelengths is always available because the dual monochromators allow the selection of any wavelength in 1 nm increments. New fluorophores can easily be evaluated without purchasing additional filters.

Wavelength Scanning — The most sensitive results are achieved by using optimal excitation and emission wavelengths. Literature wavelengths are often based on results from wavelength-limited, filter-based readers. Wavelength scanning ensures that the most sensitive assay conditions are used.

Well Scanning — Gemini XS can report a single point from the well center, or multiple data points from large well tissue culture plates. This provides high sensitivity for cell-based assays.

Auto PMT Gain — Because a single microplate often presents a range of fluorescence intensities greater than three orders of magnitude, Gemini XS features “Auto PMT Gain” to avoid saturating the photomultiplier tube. The signal is calibrated against an internal standard, so the reported RFU values of individual samples can be accurately compared.

This spectrofluorometer is used and reconditioned. Our technicians will power this up and cycle through the menus to ensure that it is in general functional condition, but are unable to test it further.


Fluorescence photometric performance

Dual Monochromators

1 nm increment selection

EX Wavelength

250-850 nm

EM Wavelength

360-850 nm

Bandwidth (Excitation & Emission)

9 nm

Detection Limit (Signal 3X SD of Baseline)

2.0 fmol/well FITC 200 µL in 96 wells

Time Resolved Fluorescence (secondary mode)

Data Collection

50-1450 µsec, 200 µsec increments


0.5 fmol/well

Luminescence Photometric Performance

Wavelength Range 250-850nm

Detection Limit

10 amol/well Alkaline Phosphatase 200 µl/well

General photometric specifications

Microplate Formats

6-, 12-, 24-, 48-, 96-, and 384-well

Light Source

Xenon flash lamp (1 joule/flash)


Photomultiplier (R-3896)

Read Time***

96 wells in <27 seconds
384 wells in <45 seconds

Shaker Time

0 to 999 seconds

Temperature Control (Chamber)

Ambient + 4 °C, to 45 °C




The photos above are representative. Please bear in mind that the equipment shown is currently in storage in our warehouse and that in addition to testing each machine we will clean all the equipment thoroughly prior to shipment. We often have multiple units of each model in stock and sometimes we're unable to feature photos of every single unit. At your request, we can provide photos of the equipment in your order after it has been tested and cleaned.

Please call 978-521-2221 or email us today for pricing and additional information.