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The compact spectroradiometer SR900 is a high-resolution measurement system for quick and precise measurements in the UV range, the visible spectral range and the IR. The spectroradiometer consists of an array spectrometer without any moving parts and a silicon detector with 2048 pixels. The spectral resolution is 0.4 nm.

The SR900 is combined with a SMA-905 quartz light light guide and our radiometric sensor heads for measuring the irradiance and illuminance.

Traceable to the PTB, the SR900 is factory-calibrated. A DAkkS test in our accredited laboratory is optionally available. The SR900 thus enables exact spectroradiometric measurements for the assessment of irradiances and illuminances, biological effectiveness and color measurements. Due to the nearly scatter-free construction, a high sensitivity in the UV range is reached. Control and data evaluation is carried out by the spectral software SRpro. With trigger input and output, the SR900 is also suitable for automated measurements.

For the SR900 we additionally offer a wide range of accessories, which are combinable with customized extensions.

An optional xenon flash lamp and a fixed sample or cuvette holder can be used for transmission measurements. The xenon flash lamp can be operated directly on the SR900 and does not require any warm-up time. The high durability of 109 flashes ensures a permanent use. 
The photometer add-on TR-ZPM-SMA for the determination of the transmission of 3D samples also uses the xenon flash lamp.

For luminous flux measurements and LED measurements, the SR900 can be combined with our integrating sphere.



  • Spectral range 200-1100 nm
  • Nearly scatter-free grid with 300 lines/mm
  • Spectral resolution 0.4 nm and 2,3 nm bandwith
  • Order filtering
  • Spectral software for the color measurement, radiometric and effects-based measurements
  • Simple validation by means of the user concept
  • Wide range of accessories


  • Spectroradiometry
  • Spectroradiometry
  • Online process control, quality control
  • Testing of light sources (lamps, LEDs)
  • Color measurements and color control
  • Measurement of the global radiation
  • Inspection of optical materials and components, e.g. light conductors
  • Qualitative and quantitative analyses in chemistry, pharmacy and biology


Spectral range 200 - 1100 nm
Spectral resolution 2,3 nm (FWHM)
Gratting 300 l/mm, holografic
Focal length 75 mm
Blaze wavelength 250 nm
Detector SI
Pixel size 14 x 200 µm
Number of pixel 2048
Pixel distancev0,44 nm  
Resolution 16 bit
Integrations time 0,1 ms to 60 s
Max. Dynamic range 10^4:1 with 3 measurements
Interface USB
Trigger rear connection
Dimensions 177 x 125 x 45 mm
Weight 1.2 kg
Supply voltage 5 V, 500 mA  
Power < 3 W
Operating temperature 5 to 40 °C
Storage temperature -10 to 60 °C
Humidity <80%, non-condensating
System requirements Windows 10/11, min 1 GB RAM
  50 MB free HDD