Broadband Spectroradiometer 

specbos 1211UV

Optionally the instrument is available with an extended wavelength range, beginning at 230 nm. It is possible to measure in this extended range in Radiance as well as in Irradiance mode. (download datasheet
1 Osram HMI lamp LiVal 1000
Spectrum of Osram HMI lamp

specbos 1211UV uses a silica optics and the extended calibration is done with a Deuterium lamp and, in case of Radiance mode, additionally with a diffuse white standard.


  • Evaluation of hazard of non coherent optical radiation   info
  • Measurement of UV spotlights and fluorescence lamps
  • Characterization of daylight simulators   info
  • Measurements using spectral weighting functions    info



Optical Parameters
   Spectral range    230 nm - 1000 nm
   Optical resolution (FWHM)    4.5 nm
   Calculated wavelength step    1 nm
   Digital electronic resolution    16 Bit ADC (15 Bit used)
   Viewing angle    1.8° (Luminance mode)
   Measuring distance / diameter    20 cm - Ø 6 mm; 100 cm - Ø 31 mm (luminance mode)
   Measuring values    Spectral radiance    
   Total luminance/ total radiance 
   Total illuminance/ total irradiance 
   Chromaticity coordinates x , y ; u', v'
   Correlated Color Temperature, color purity
   Color Rendering Index, RGB
   Circadian metrics, Photosynthetically Active Radiation
Measuring ranges and accuracie
   Measuring range luminance
   (specbos 1211-2)
   0.1 - 100 000 cd/m² (higher values with optional filter) @ illuminant A
   Measuring range illuminance
   (specbos 1211-2)
   2 - 500 000 lx @ illuminant A
   Luminance accuracy    ± 2 % @ 100 cd/m² and illuminant A
   Luminance reproducibility    ± 1 %@ 100 cd/m² and illuminant A
   Chromaticity accuracy    ± 0.002 x , y @ illuminant A
   Color reproducibility    ± 0.0005 x , y @ illuminant A
   CCT reproducibility    ± 20 K @ illuminant A
   Wavelength accuracy    ± 0.5 nm
Other technical data
   Dispersive element    Imaging grating (flat field)
   Light receiving element    CCD array 2048 pixel
   Power supply    USB powered
   PC interface    USB 2.0 fullspeed
   Dimensions    180 mm * 82 mm * 53 mm
   Weight    450 g
   Operating conditions    Temperature 10 - 40 °C
   Humidity < 85 % relative humidity at 35 °C

   All inclusive accessories packet
   Cosine corrector head-piece (for irradiance measurement)  
   Transport box
   PC software JETI LiVal 
   Operating instructions and firmware commands (digital)
   USB cable
   Trigger connector
   Calibration    NIST traceable
   Recommended recalibration interval    1 year