Gigahertz-Optik Logo

Quick Contact

Gigahertz Optik GmbH (Headquarter)
Phone: +49 (0)8193-93700-0

Gigahertz-Optik, Inc. (US office)
Phone: +1-978-462-1818


You can add products to the watchlist and compare them with one another or send us an inquiry. There are watchlist symbols on product pages and product tables for this purpose.

This Product is discontinued, please refer to the Alternatives shown below under Similar Products or contact us directly.

Alternative Products for this discontinued product:


Detector Head for use in UV Photo-biological Hazard Measurements

  • UV-A and UV-BC actinic UV irradiance
  • IEC/EN 62471 and DIN EN 14255
  • ICNIRP / ACGIH (>240nm)
  • For use with X1 Optometer

Several guidelines and standards for UV hazard risk assessment exist today. The ICNIRP spectral weighting function for Actinic UV, S(λ), is most commonly required. For example, it is specified in IEC and EN 62471, DIN EN 14255, ANSI RP27.1, and 2006/25/EC. The XD-9506 incorporates a two sensor design that offers best possible isolation between the UV-Aeff and UV-Beff sensors while providing the closest spectral match to the ICNIRP S(λ) actinic UV weighting function.

ACGIH / Far-UVC measurements

Prior to the publication of their Threshold Limit Values (TLVs) in 2021, the American Conference of Governmental Industrial Hygienists (ACGIH) specified the same actinic UV weighting function, S(λ), as IEC 62471, etc. The current edition of ACGIH TLVs reduces this weighting function in the wavelength range below 240nm.  The XD-9506 is not suitable for hazard measurements of far-UVC sources such as Kr-Cl excimer lamps that exhibit strongest emission at 222nm.  The photobiological safety of such lamps is very dependent on the filtering used to block longer wavelength UVC radiation. Such measurements should be performed with the Gigahertz-Optik BTS2048-UV spectroradiometer. The XD-9506 is suitable for all ACGIH UV hazard measurements of sources with no emission below 240nm

Traceable calibration

Calibration of the detector ICNIRP (W/m²) responsivity is performed by the Gigahertz-Optik GmbH calibration laboratory for optical radiation measurements quantities. As with all light detectors supplied by Gigahertz-Optik calibration of absolute detector responsivity as well as detector individual measured relative spectral responsivity data is included.

Recommended Optometer


XD-9506-4 - Typical Spectral Responsivity

XD-9506-4 - Typical Spectral Responsivity

Similar Products

Detector for UV Hazard Measurements
Optometer for the measurement of UV and Blue-light hazard of artificial radiation source.
Broadband radiometer for radiation protection measurements of UV radiation devices

Product Categories