SR-4500A Spectroradiometer Offers Range of 350-2500 nm

Press Release Summary:

SR-4500A Spectroradiometer is designed for radiometric calibration transfer and offers a drift stability of 0.1%. The meter is equipped with silicon photodiode array (350-1000nm), 256 elements TE cooled extended In GaAs array (1000-1900nm) and 256 element TE cooled extended In GaAs array (1900-2500nm). The unit uses temperature controller for maintaining the temperature of the housing and features NER of 0.9x10-9 W/cm²/nm/sr at 900 nm and 0.2x10-9 W/cm²/nm/sr at 400 nm and 700 nm.

Original Press Release:

The SR-4500A is Designed for Applications that Require Precise, Stable, Repeatable Performance.

Lawrence, MA – March 27, 2018 – Using all thermoelectrically cooled photodiode arrays, the SR-4500A spectroradiometer is built specifically for the performance demands of radiometric calibration transfer. With the SR-4500A, you can take the calibration process where it’s needed with the following advanced features:

  • Drift stability of 0.1% which delivers greater accuracy for long-term stability of integrating spheres
  • Stability is achieved through heating and cooling thermal management features
  • A temperature controller maintains the instrument housing at a stable temperature along with the individually temperature stabilitzed detector arrays
  • All temperatures are integrated into DARWin software readout for monitoring

The SR-4500A was built to meet the exacting needs of customers for measuring temporal stability. The SR-4500A also features:

  • Spectral range of 350-2500nm
  • 512 element TE cooled silicon photodiode array (350-1000nm)
  • 256 element TE cooled extended In GaAs array (1000-1900nm)
  • 256 element TE cooled extended In GaAs array (1900-2500nm)

In addition to stability, the SR-4500A also provides superior Noise Equivalence Radiance capabilities:

Noise Equivalence Radiance (with 1.2 meter fiber optic)

0.2x10-9 W/cm²/nm/sr @ 400nm

0.2x10-9 W/cm²/nm/sr @ 700nm

0.9x10-9 W/cm²/nm/sr @ 900nm

For more information on the SR-4500A, please contact:


Established in 2004, SPECTRAL EVOLUTION is a leading manufacturer of laboratory and handheld portable spectrometers, spectroradiometers and spectrophotometers. SPECTRAL EVOLUTION spectrometers are used worldwide for many mission-critical lab and field applications in mining, remote sensing, vegetative studies, ground truthing, environmental and climate studies, developing satellite calibrations, and more, due to their reliable, robust, rugged design and user-friendly one-touch features. 


Press contact

Mo Kashdan

Marketing & Sales



1 Canal Street, Unit B1

Lawrence, MA 01840 USA

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