Posted in | News

Remote Spectral Detector for PAR Measurement

Gigahertz-Optik GmbH's CSS-45 packs the full power and capability of a spectroradiometer into a self-contained compact metal housing only 1.75" dia x 2" high in size. The CSS-45 covers a spectral range between 360 nm and 830 nm (extended visible spectral range according to CIE S023).  An optical bandwidth correction function based on CIE 214 further improves the quality of the measured values. 

Manual and auto gain settings enable a wide measurement range from 1 lx to 350,000 lx for illuminance and color measurements. Automatic dark current suppression is accomplished by means of a built-in electronic shutter.  Accurate illuminance measurements require a precise, cosine-corrected entrance optic. The CSS-45 has an excellent cosine response (f2≤ 1 %).   The spectral detector head attaches to a PC via a one meter long USB cable. The USB interface handles the power requirements. All measurement, data readout and collection is controlled by the supplied software. There is also an SDK available for self-programmers. A unique feature is the CSS-45 RS485 interface to permit fast communications with the device at longer distances for remote applications.

Every CSS-45 comes calibrated and certified by Gigahertz-Optik's calibration laboratory that is accredited by DAkkS (D-K-15047-01-00) for spectral responsivity and spectral irradiance calibrations according to ISO/IEC 17025.

Additional CSS-45 Specialist Functions:

  • Horticultural lighting - PAR measurement Photosynthetic Photon Flux Density (PPFD) in μmol/m²s
  • Human Centric Lighting - melanopic irradiance and illuminance, melanopic daylight equivalent illuminance
  • Phototherapy - total irradiance for bilirubin, Ebi, in mW/cm2 (IEC 60601-2-50) as well as average spectral irradiance in μW/cm2/nm (American Academy of Pediatrics)

Web link to product:


Please use one of the following formats to cite this article in your essay, paper or report:

  • APA

    Gigahertz-Optik Inc. (2018, March 23). Remote Spectral Detector for PAR Measurement. AZoOptics. Retrieved on October 17, 2021 from

  • MLA

    Gigahertz-Optik Inc. "Remote Spectral Detector for PAR Measurement". AZoOptics. 17 October 2021. <>.

  • Chicago

    Gigahertz-Optik Inc. "Remote Spectral Detector for PAR Measurement". AZoOptics. (accessed October 17, 2021).

  • Harvard

    Gigahertz-Optik Inc. 2018. Remote Spectral Detector for PAR Measurement. AZoOptics, viewed 17 October 2021,

Tell Us What You Think

Do you have a review, update or anything you would like to add to this news story?

Leave your feedback