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UVC Radiometers

UV-C radiometers / UVC light meters for measuring the irradiance (µW/cm²) and dose (mJ/cm²) of germicidal lamps including Hg, excimer and xenon lamps as well as UV-C LEDs. Compact, laboratory grade UVC meters for use in the field, product development and research. UVC Meter Product Selection Guide below:

Short wavelength high energy ultraviolet radiation in the UV-C spectral range from 100 nm to 280 nm is widely used in the germicidal and bactericidal disinfection of air, surfaces and water.

UVC radiation is lethal to airborn pathogens that can cause diseases like tuberculosis. The COVID-19 pandemic has sparked a marked increase in demand for germicidal UV sources and the need for accurate measurements with suitable UVC light meters.

In order to maintain Ultraviolet Germicidal Irradiance (UVGI) efficacy while ensuring safety from overexposure to UV radiation, measurements of the germicidal sources and areas of application are performed.

Due to its high and pre-dominantly monochromatic output at 253.7nm, low pressure mercury has historically been the light source of choice in UV-C germicidal applications. Medium and high pressure mercury sources are also in use as well as pulsed Xenon.

New developments in germicidal UV sources of particular note are UV-C LED arrays (265-280)nm and far UV lamps such as excimer KrCl (222nm).

Our range of UVC radiometers enable measurements in accordance with important standards for germicidal UVC products including IEC/EN 62471, DIN/TS 67506, and IEC 60335-2-65. See application note about Germicidal UVC Standards for a full description.

Gigahertz Optik GmbH offers a comprehensive range of UVC radiometers, UVC light meters and UVC spectroradiometers designed and calibrated for the accurate measurement of irradiance and dose of all these germicidal UV source technologies. This means our UV detectors often offer several calibration entries for different UV sources. This is the bases for accurate UVC measurements with such a UVC meter.

Spectral responsivity of UVC detector range
 

UVC radiometers in general are available based on two different technologies:

  • Integral measuring UVC radiometers / UVC light meters are most suited for routine measurements of the UV irradiance from known source types. These UVC light meters are inexpensive and very easy to use and are based on filtered photodiode detectors which are read out by transimpedance amplifiers.
  • UVC spectroradiometers are ideal for research work and product development or quality control of UVC light sources. They provide greatest radiometric accuracy independent of the source type and deep analyses of the spectral shape of the UVC radiator. We offer superb stray light correction for our array-spectroradiometers in the UVC spectral range. Our UVC spectral light meters are very easy to use and all corrections are automatically applied for easy to access high accurate UVC spectral measurements, e.g. of UVC LEDs which tend to drift in wavelenght by temperature and show significant aging.

Gigahertz-Optik developed a product range of compact integral and spectral measuring UVC measurement systems and meters. These are portable, hand-held system and easy-to-use. Our spectroradiometer offers superb stray light reduction for highest measurement accuracy.

Nowadays, due to the many different light sources, also the UVC radiometer has to offer different calibrations for e.g. LEDs, Excimer lamps or Mercury sources. We offer such standard calibrations as well as individual calibrations. Of course, these are traceable to NMI like NIST or PTB. Our high quality calibration and testing laboratory can also perform extensive ISO 17025 calibrations or tests.

See one of the most versatile and powerful ranges of UVC measurement systems:

UVC meters for irradiance (µW/cm²) and dose (mJ/cm²) measurements of germicidal Hg, excimer as well as UV-C LEDs.

Typically used for routine measurement of UV irradiance from known source types.

Model Image Spectral function Wavelength range / nm Entrance optic Typical range min. (NEI) Typical range max. Remark
X1-UV-3725 X1 1 UV 3725 UVC / UVGI 254 8 mm Ø diffuser 0.002 µW / cm² 2000 mW / cm² Calibrated at 254nm for low pressure Hg lamps. Meter for irradiance and dose with peak-hold function. Large dynamic range for germicidal efficacy and hazard measurements. Good cosine response.
X1-UV-3726 X1 1 UV 3726 UV-C / UVGI
250 -300 11 mm Ø diffuser 0.002 µW / cm² 1000 mW / cm² Calibrated in 5nm steps for UV-C LEDs and at 254nm for low pressure Hg lamps. Meter for irradiance and dose with peak-hold function. Large dynamic range for germicidal efficacy and photobiological safety measurements.
X1-UV-3727 X1 1 UV 3727 UVC / UVGI 200 - 300 19.2 mm Ø diffuser 0.002 µW / cm² 1000 mW / cm² For Excimer Kr-Cl lamps, low pressure Hg lamps and UV-C LEDs. Calibrated at 222nm, 254nm and in5nm steps. Meter for irradiance and dose with peak-hold function. Large dynamic range for germicidal efficacy and photobiological safety.
X1-UV-3718 X1 1 UV 3726 UVC / UVGI 254 11 mm Ø diffuser 0.005 µW / cm² 2500 mW / cm² Calibrated at 254nm for low pressure Hg lamps. Meter for irradiance and dose with peak-hold function. Replaces X9-11 model.

UV spectroradiometers for measuring the spectral irradiance and spectral flux of germicidal lamps including low pressure Hg, excimer and xenon lamps as well as UV-C LEDs

UV spectroradiometers are ideal for research work and product development. They provide greatest radiometric accuracy independent of the source type. We offer superb stray light correction in the UVC spectral range.

Model Image Entrance optic Wavelength range / nm Optical Bandwidth Measurement range - min Measurement range - max Remark
BTS2048-UV BTS2048 UV persepktive 10 mm Ø Cosine diffuser f2 ≤ 3% 200 - 430 0.8 nm 0.1 mW/(m²nm) @265nm 100 kW/(m²nm) @265nm
UV-optimised spectroradiometer. Compact, laboratory grade instrument with integrated precision cosine diffuser. Supplied with traceable calibration certificate.
BTS256-UV BTS256 UV Series 9 mm Ø Cosine diffuser 200 - 525 2.8 nm 20 mW/(m²nm) @265nm 10 kW/(m²nm) @265nm Ultra-thin UV spectroradiometer with integral display for high intensity UV radiation.
TFUV10 TFUV 10 webheader2 100 mm Ø sphere
25.4 mm Ø entrance
200 - 550 1 nm 0.02 µW / nm @ 265nm 20 W / nm @265 nm Measurement system for spectral radiant power of UV LEDs in a wavelength range from 200 nm to 550 nm. Complete measuring system with integrating sphere, spectroradiometer, software and calibration.

Mobile UVC reflectance meter

Model Image Measurement geometry Light Source Sensor Control electronics Remark
LCR-20 LCR 20 Device v2 45°/45° and 45°/0° UV LED 254nm peak UV-3725 X1-5 Mobile UVC reflectance meter for measuring surface reflectance. Permits accurate modelling and site-surveys for germicidal UV applications.

UV Goniometer (spectral)

Model Image Measurement geometry Max load Horizontal resolution Axial resolution Remark
GB-GD-360-RB40-2-BTS2048-UV GB GD 360 BTS2048.12 Goniometer 2-Pi distance 100 - 2000mm 1.5 kg 0.1° 0.2° Goniometer with high end UV spectroradiometer with high dynamic range for UV lamps and UV LEDs, 200 nm - 430 nm.