Calibrated Spectral Flux Light Measurement System


light measurement system

Light Measurement System (shown with discontinued SP-75 Spectroradiometer)

Equipped with SP-85 Spectroradiometer

Stray light calibration and correction is available as an additional service on all SP-85 models.

Types of measurements:

  • Spectral Radiant Flux
  • Luminous Flux (Lumens)
  • CIE 1931 (x, y) and 1976 (u’, v’)
    chromaticity coordinates
  • Dominant Wavelength
  • CCT and CRI
  • LED Measurement
  • VIS and/or UV Light Measurement (depending on spectrometer options)
  • Lamp Measurement
  • Fiber Optic Illumination Measurement

The CSA Group Seattle SP-85 Calibrated Spectral Flux Light Measurement Systems are composed of an SP-85 Diode Array Spectrometer, calibrated Integrating Sphere and Spectral Suite Software. SP-85 systems provide users with a simple to operate integrating sphere system that measures the amount of light entering the port of the integrating sphere.

The SP-85 Systems offer high sensitivity, low noise, and fine optical resolution. This combination of optimized performance characteristics makes the SP-85 series spectrometers perfect for calibrated spectral radiant flux measurement. The SP-85 spectrometers are designed specifically for LED measurement, lamp measurement, and lighting measurement applications.

All spheres are calibrated to measure the total flux entering the port on the front of the integrating sphere. Integrating sphere sizes include diameters of 2 and 6 inches.

Accessories (included)

  • PC Software
  • Cosine Correction
  • Measurement Head
  • External Trigger Connector
  • Transportation Case

Software Capabilities

  • CIE 1931 Chromaticity
  • Coordinates: x, y
  • CIE 1976 Chromaticity
  • Coordinates: u’, v’
  • Correlated Color Temperature
  • Dominant Wavelength
  • Color Rendering Index



Photodiode Array Resolution:
Spectral Range:
Optical Bandwidth:
Wavelength Binning Resolution:
Dynamic Range Resolution:
Optical Input:
Typical Flux Measurement Range:
Wavelength Accuracy:
Wavelength Repeatability:
Stray Light:
Chromaticity Accuracy (x,y):
Chromaticity Repeatability (x,y):
CCT Reproducibility:
Integration Time Range:
Operating Environment:
Power Supply:
1024 pixel
300 nm to 1000 nm (custom wavelengths available)
4.5 nm
1 nm
16 bit
SMA Fiber Connector
.25 Lm to 25000 Lm
± 0.5 nm
± 0.1 nm
< .02%
± 0.002
± 0.0005
± 20K (Illuminant A)
6 to 60,000 ms or Triggered
2.25 in. x 3.25 in x 1.5 in.
0.25 kg
10 to 40 °C and < 85 % relative humidity
USB 2.0
USB powered


Call us at 425-605-8500 or email for price information or an immediate quote today.