1 Canal Street ◊ Unit B1
Lawrence, MA 01840 USA
Tel: 978 687-1833 ◊ Fax: 978 945-0372
Email: info@spectralevolution.com
Copyright © 2012 Spectral Evolution, Inc
SPECTRAL EVOLUTION Spectroradiometers can be used to measure
absolute power levels of LEDs and other spectral devices. In this figure,
spectral irradiance of the SPECTRAL EVOLUTION ILM-105 light source at
both high (red trace) and low (green trace) intensity settings was measured at
its fiber output using a SPECTRAL EVOLUTION SR-3500 Spectroradiometer.
SR-Series Spectroradiometers
SPECTRAL
EVOLUTION
SR-Series
spectroradiometers
are supplied with a
fiber optic cable as
standard and are
available with an
optional sphere.
Contact us for
additional info.
SPECTRAL EVOLUTION laboratory SR-series full range photodiode
array spectroradiometers display superior signal-to-noise ratio and
including:
- Solar radiance and irradiance measurements
- Solar simulator test and classification
- LED, laser, light source metrology
- Radiometric calibration transfer
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
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 solar simulators.
Silicon Photodiode Array UV-VIS-NIR Spectroradiometers
SPECTRAL EVOLUTION Si Photodiode array spectroradiometers are ideal for researchers on
limited budgets or for applications that don't require the broad spectral range of our full-range
spectroradiometers. Compact in size, these full featured units include:
- High reliability all photodiode array optics with no moving gratings to break in the field
- Autoexposure, autoranging and autoshutter functions for easy one-touch operation
- Lightweight– less than 4 pounds- sturdy aluminum chassis
- Includes 1/2 meter nondetachable fiber optic cable with right angle diffuser
- Exclusive DARWin SP Data Acquisition software provided with each unit
Technical Specifications-
SR-1100 and SR-500 Spectroradiometers
Validate the class of any commercially available solar simulator using the SR-1100 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 LR- and SR-Series Spectroradiometer. The red
trace demonstrates the simulated solar graph of AM1.5 Global Tilt as per ASTM specification (E892). The
black trace shows the actual measurement of irradiance as detected using the SR-1100 over its full
spectroradiographic range (320-1100nm). Built-in software routines automatically provide class status
as a function of wavelength (inset).

LED- Measurement: Rapid one-touch measurements of light emitting diodes can be obtained
using the SR-500 Spectroradiometer and the companion DARWin SP Data & Acquisition
Module included with each unit. Here, the SR-500 was used to measure irradiance levels of
commercially available red LEDs (red trace) and yellow LEDs (yellow trace) in two separate
experiments. Easy pull-down menus in the software allow users to superimpose graphs for
convenience
Full Range Photodiode ArrayUV-VIS-NIR-SWIR
InGaAs / Si Laboratory Spectroradiometers

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 3.5nm (350-1000nm); 10nm @ 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-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-1900 Extended Range Spectroradiometer
- 350-1900nm range
- 512 element Si PDA and 256 element extended InGaAs array
- Spectral resolution 3.5nm (350-1000nm); 10nm @ 1500 & 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
SR-1600 Spectroradiometer
- 300-1700nm range
- 512 element Si PDA and 256 element extended InGaAs array
- Spectral resolution 5nm (300-1000nm); 10nm @ 1000-1700nm



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.
NEW!
SR-3501 and SR-1901
Spectroradiometers
- Spectral range 280-2500nm
- Ideal for remote sensing and
radiometric calibration transfer
- NIST traceable calibration