CSS-45 + CSS-D Hand-held Spectrometer

Gigahertz-Optik CSS-45 + CSS-D Hand-held Spectrometer
Hand-held meter measures light-color-spectra-PAR-Bilirubin

Gigahertz-Optik GmbH's CSS-45 packs the full power and capability of a spectroradiometer into a compact splash proof metal housing only 1.75" dia x 2" high in size. Adding the CSS-D display unit, which connects to the CSS-45 via a 2 m long flexible cable, provides convenient handheld operation and control.
Typical applications include photometric and radiometric setups requiring remote positioning of single or multiple detectors. Use with positioning equipment, e.g.for mapping and profiling. Industrial monitoring, grow lights, blue light phototherapy, human centric lighting.

Expanded Visible Spectral Range per CIE S023
The CSS-45 covers the entire visible spectral range between 360 nm and 830 nm (visible spectral range according to CIE S023).

Accurate Measurements over a Wide Dynamic Range
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 to automate dark level measurements thereby facilitating accurate remote operation over extended periods.

Accurate illuminance measurements require a precise, cosine-corrected entrance optic. The CSS-45 has an excellent cosine response (f2≤ 1.5 %).

Single or Multi-Detector Use
Both USB 2.0 and RS485 interfaces are standard to permit fast communications with the device at longer distances for remote applications plus single and multi-detector networks. The USB interface handles the power requirements.

User & SDK Software Supplied
The spectral detector head attaches to a PC via a one meter long USB cable. All measurement, data readout and collection are controlled by the supplied S-CSS-45 software. Plus the S-SDK-CSS-45 software development kit is available on option for self-programmers.

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.


  • Protective dome over the top of the detector for weatherproofing
  • S-SDK-CSS-45 software development kit

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

Product Specifications
For product specifications and options for the CSS-45 + CSS-4D, please visit the Gigahertz-Optik main website here.

To Order The CSS-45 + CSS-4D Hand-held Spectrometer, Call Us Today At 1-978-462-1818.
Practical Solutions To Real Application Problems

Here's The Problem:
You need to make fast accurate lux, color and spectral distribution measurements on the go. A remote cabled detector with small footprint is required since space is limited.

Here Are The Requirements:

  • Handheld lux-color-spectral meter
  • Display unit for quick easy reading
  • Detector on cable for remote placement in limited space applications
  • Fast and accurate measurements of intensity, color and spectra

Here's The Solution:
Gigahertz-Optik's CSS-45 Remote Spectroradiometer Detector + CSS-D Display Unit for fast accurate light & color measurements on any type of light source.

Interested in discussing your LED measurement application? Give us a call!