Calibrated and ready-to-measure instruments for UV special lamps and sources

UV meters | Instruments for UV special lamps Spectrometers for laboratory applications

Instruments for UV special lamps and sources

Optical radiation is best known for providing lighting but this is only a small part of the spectral range. Other, non-visible optical radiation frequencies are well recognized and widely used in specific applications. The use of these ranges make alternative methods to disinfection, pest control and medical treatment for instance.
GL Optic provides calibrated and ready-to-measure instruments for UV radiation test and measurements. Our systems are optimized for specific UV-A (315-400 nm) UVB (280-315 nm) and UV-C applications. We offer customized measurement systems on request. Each GL Optic spectroradiometer includes factory calibration with respect to the following: Wavelength Calibration, Linearity Correction, Stray Light Rejection and the Absolut Calibration with the use of traceable Spectral Irradiance Standard lamp and/or Total Spectral Luminous Flux standards.

Immediate performance control

Use our plug-and-measure instruments for fast and accurate UV radiation testing in the laboratory environment and in industrial on-site applications.

Develop better UV LED products

Simple and reliable measurements of UV dominant wavelength and irradiance values is available. Now developers and system engineers can verify components for UV applications faster and better.

Make sure to choose the right equipment

We are here to help you improve your quality control and speed up your development. Feel free to share the details of  your application with our support team today.
With us you will find the UV meter perfectly suited to your needs.

Working with industry’s most innovative companies:

Dyson Technology Ltd, UK | LG Innotek, Korea | Signify | Linxens microtech, France | Thor Photomedicine, Inc. USA
GL Optic UV-C lamp for water disinfection measurement

Disinfection lamps

Optical radiation in UV-C range is widely used as a disinfectant for water, air or surfaces. The effectiveness of killing viruses, bacteria, yeasts and fungi is greatly dependent on the wavelength of the UV-C radiation. As applications of UV LEDs in purification systems increase, it is important to know that the effectiveness of disinfection strongly depends on both the LED bin used and batch to batch variation. UV-C irradiance deactivation of harmful microorganisms varies based on wavelength shifts (not a case for mercury-based lamps which are consistent with peak wavelength). In order to guarantee healthy water checks of spectral LED characterization of every single LED, the completed application is critical.

How to measure disinfection lamps?

To maintain continuous characterization of the disinfectant process we recommend spectral irradiance measurements in the UV range with the use of the optical spectroradiometer – GL SPECTIS 4.0 UV VIS NIR. This instrument can be calibrated from 200 nm to 850 nm with optical resolution (FWHM) of 2.5-3.5 nm. For UVC spatial intensity distribution measurement the GL SPECTIS 5.0 Touch, in combination with the benchtop GL GONIO SPECTROMETER system, can be used. This system will provide a perfect solution to manufacturing issues caused by variable UVC intensity distribution. For radiant power measurements we recommend small sized integrating spheres GL OPTI SPHERE 48 or GL OPTI SPHERE 205 which can be mounted directly, alternatively it can be coupled with one of the spectroradiometers by a fiber optic cable.
UV-measurement solutions

Pest control lamps

Attracting insects with UVA radiation by utilizing fluorescent or LED based lamps installed in insect traps is a widely used common practice. Catch rate strongly depends on the wavelength and intensity distribution of the lamps. Therefore, it is critical to maintain the correct LED wavelength properly. Shifts in peak wavelengths, even within the same LED bins, can reduce catch rate by half.

How to measure pest control lamps?

UV VIS spectroradiometer GL SPECTIS TOUCH 1.0, calibrated from 340 nm ( 320 on request ), can measure irradiance [mW/m2] and the spectral power distribution of the system. For single LED characterization, the GL OPTI SPHERE 48 mounted directly on the GL SPECTIS TOUCH 1.0 is an ideal solution. When traditional discharge lamps are replaced with UV LED modules, a spatial intensity distribution of UV-A flux coming from the trap should be verified to ensure proper distribution of the radiation. This can be characterized with the use of our bench top GL GONIO SPECTROMETER GLG 8-850 connected with our GL SPECTIS 5.0 UV VIS spectroradiometer. Such setup will provide full spectral characterization of the source and collect radiant intensity distribution data. The data is available as a spatial distribution diagram in radiometric scaling [mW].
Medical treatment lamps measurements UV-B

Medical treatment lamps

Narrow or wide beam UV-B (280-315 nm) and UV-A (315-400 nm) radiation is effectively used for treatment of skin diseases (e.g. psoriasis, vitiligo, atopic dermatitis). A small shift in the dominant wavelength, of just a few nanometers, can make the difference between the useful and the harmful effect of the radiation used for phototherapy. Consequently, it requires very high precision of wavelength or emission range measurements . Evaluating and releasing equipment for phototherapy can be done properly only with accurate and precise measurements of spectral power distribution and characterization of effective UV-B/UV-A irradiance.

How to measure medical treatment lamps?

Testing solution can be realized with the use of GL SPECTIS 4.0 UV-VIS-NIR or GL SPECTIS 5.0 Touch that can be/are available calibrated in required UV-B and UV-A range. Different fiber optic connections and probes are on demand depending on the application. A range of integrating spheres designed to measure optical power is available with the possibility of their customization for different sizes of the tested products.

Build your own set

The products below can be configured together in different combinations as required by the application.


  • Optimized solution for fast and accurate characterization UV-VIS-NIR radiation sources, it covers an extended spectral range from 200-1050 nm (UV VIS to IR)
  • It features a large laboratory grade back thinned CCD sensor from Hamamatsu delivering extraordinary stability over longer exposure times.
  • It is ideal for LED measurements and can be paired with any of our integrating spheres and goniometer systems for advance measurements in accordance with CIE 127:2007 and CIE 025/E:2015
GL GONIO SPECTROMETER GLG 8-850 banchtop goniometer


  • A unique tabletop goniometric system for small LED lamps, modules and components performance UV measurements
  • Automated tests and measurements of UV LEDs radiant intensity distribution including radiometric [mW] scaling
  • Complete with UV VIS NIR Spectro-Radiometer, PC and dedicated software suite
GL Spectis 1.0 Touch smart spectrometer GL OPTIC


GL SPECTIS 1.0 Touch is an essential tool for R&D departments, application engineers and developers for:

  • Checking the influence of dimming
  • Testing diffusers or optics installed on LEDs
  • Monitoring changes of spectra, color or luminous flux
GL SPECTIS 5.0 Touch laboratory grade spectroradiometer


Laboratory grade, extended range GL SPECTIS 5.0 Touch smart spectrometer. This high performance instrument can be used in accredited laboratories, scientific and R&D departments where characterizing outside the visual range is needed.

  • For general lighting systems and specialized technical lighting measurement
  • Can be calibrated to provide immediate effective values measurement like PBAR or Photon Flux
  • Extended spectral range calibration of the sphere system from 300 nm for Total Flux
  • High resolution and low stray light instrument ideal for advanced analysis of SPD


  • Rack mounted, laboratory level spectroradiometer working in an extended UV VIS NIR spectral ranges
  • Easy integration with various types of measuring probes and peripheral instruments
  • Can be coupled with integrating spheres and customized optical probes
GL Spectis 1.0 Touch + Flicker GL Opti Sphere 48 leds measurements


Using the GL OPTI SPHERE 48 can be mounted directly to the GL SPECTIS 1.0 Touch to form a portable flux measurement system with:

  • Apertures for different size LEDs
  • Extended dynamic range adapter
  • Special accessories for QC/QA

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