Full Range Photodiode Array UV-VIS-NIR-SWIR
Laboratory Spectroradiometers

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The SR-Series of full range laboratory spectroradiometers is ideal for a wide range of applications, including:

  • Solar radiance and irradiance measurements
  • Solar simulator test and classification
  • LED, laser, light source metrology
  • Radiometric calibration transfer
  • Remote sensing applications

The SR-Series delivers a range of models that provide the following benefits:

  • High sensitivity with a high signal-to-noise ratio and an unmatched wide dynamic range
  • Fast and easy operation
  • Autoexposure, autoscaling, and auto dark shutter for fast, accurate, one-touch scans
  • Compact, lightweight design – easy to fit into your lab
  • NIST traceable calibration for irradiance or spectral radiance measurements and calibration transfer
  • No internal fiber optics or movable gratings that can break, drift, or fail during mission critical experiments
  • Fiber optic or optional integrating sphere input

SR-Series Spectroradiometers

SR-6500 Ultra High Resolution Spectroradiometer

  • 350-2500nm range
  • Three TE-cooled photodiode arrays: 1024 element TE-cooled silicon detector; 512 element TE-cooled InGaAs detector; 512 element TE-cooled extended InGaAs detector
  • Spectral resolution:
    • 1.5nm (350-1000nm)
    • 3.0nm @ 1500nm
    • 3.8nm @ 2100nm

SR-4500 and SR-4500A TE-Cooled Lab Spectroradiometers

  • 350-2500nm range
  • Three TE-cooled photodiode arrays: 512 element TE-cooled silicon detector; 256 element TE-cooled extended InGaAs detector; 256 element TE-cooled extended InGaAs detector
  • Spectral resolution
    • 3nm (350-1000nm)
    • 8nm @ 1500nm
    • 6nm @ 2100nm

SR-3500 High Resolution Lab Spectroradiometer

  • 350-2500nm range
  • 512 element Si array and two 256 element extended InGaAs arrays for best resolution in NIR ranges
  • Spectral resolution
    • 3nm (350-1000nm)
    • 8nm @ 1500nm
    • 7nm @ 2100nm

SR-3501 Extended Range Spectroradiometer

  • 280-2500nm range
  • 512 element Si array and two 256 element extended InGaAs arrays for best resolution in NIR ranges
  • Spectral resolution
    • 4nm (280-1000nm)
    • 10nm @ 1500nm
    • 7nm @ 2100nm

SR-1901PT Portable Spectroradiometer for Pulsed Solar Simulator Classification

  • 280-1900nm range
  • 512 element Si PDA and 256 element extended InGaAs array
  • Spectral resolution
    • 4nm (280-1000nm)
    • 10nm (1000- 1900nm)

SR-2501PT for Quantification of Pulsed Solar Simulators

  • 280-2500nm range
  • One 512 element UV-enhanced silicon photodiode array and one 256 element TE-cooled extended InGaAs photodiode array
  • Spectral resolution
    • 3.5nm (350-1000nm)
    • 22nm @ 1500nm and 2100nm

SR-2500 Spectroradiometer

  • 350-2500nm range
  • 512 element Si PDA and 256 element extended InGaAs array
  • Spectral resolution
    • 3.5nm (350-1000nm)
    • 22nm @ 1500nm and 2100nm

SR-1901 Extended Range Spectroradiometer

  • 280-1900nm range
  • 512 element Si PDA and 256 element extended InGaAs array
  • Spectral resolution
    • 4nm (280-1000nm)
    • 10nm @ 1500 & 2100nm

Q: What’s the difference between a spectroradiometer and a spectrometer? Which instrument should I buy?

A: SPECTRAL EVOLUTION Spectroradiometers are factory calibrated with NIST-traceable reference standards to measure spectral radiance and irradiance . They can also be used as spectrometers to measure reflectance, transflectance, absorbance and transmission. If you don’t need to measure absolute energy levels of your target, then we suggest purchasing a spectrometer. Click here to access our lab spectrometer page.

Click here to see the NEW SR-6500 SPECTRORADIOMETER

  • Spectral range 350-2500nm
  • Ultra high resolution
    • 1.5nm @ 700nm
    • 3.0nm @ 1500nm
    • 3.8nm @ 2100nm

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All SPECTRAL EVOLUTION spectroradiometers calibrated for solar radiance have capabilities for generating a spectral match report for measuring class performance as per IEC60904-9/ASTM E927-05. This is especially useful for measuring the performance of continuous or pulse solar simulators.

Validate the class of any commercially available solar simulator using the SR-3501, SR-1901, SR-2501PT, or SR-1901PT spectroradiometer as per IEC60904-9/ASTM E927-05. The graph was generated using the easy-to-use DARWin SP Data Acquisition and Analysis software included with each spectroradiometer. Built-in software routines automatically provide class status.

LED- Measurement: Rapid one-touch measurements of light emitting diodes can be obtained using the SR-3500 spectroradiometer and the companion DARWin SP Data  Acquisition software included with each unit. Here, the SR-3500 was used to measure the irradiance level of a commercially available LED.

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Download our laboratory spectroradiometers comparison