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UVC Radiometers

UV radiometers 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

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

UV C 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.

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 (265-280nm) and  far UV lamps such as excimer KrCl (222nm).

Gigahertz-Optik offers a comprehensive range of radiometers and spectroradiometers designed and calibrated for the accurate measurement of irradiance and dose of all these germicidal UV source technologies.

                                                               

                                                                        Spectral responsivity of Gigahertz-Optik UVC detector range
 

UV radiometers are available in two different technologies:

* Broadband UV radiometers are most suited for routine measurements of the UV irradiance from known source types. They are inexpensive and very easy to use.

* UV spectroradiometers are ideal for research work and product development. They provide greatest radiometric accuracy independent of the source type.



UV radiometers for measuring the irradiance (µW / cm²) and dose (mJ / cm²) of germicidal Hg, excimer and xenon lamps as well as UV-C LEDs

UV-C Radiometers
Model Image Spectral function Wavelength range / nm Entrance optic Typical range min. (NEI) Typical range max. Remark
X1-1-UV-3725 X1 1 UV 3726 UVC / UVGI 254 8 mm Ø diffuser 0.004 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.
X1-1-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.
X1-1-UV-3727 X1 1 UV 3726 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.
X1-1-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 for germicidal UV-C
Model Image Entrance optic Wavelength range / nm Optical Bandwidth Measurement range - min Measurement range - max Remark
BTS2048-UV BTS2048 UV 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 s2 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.

Product Selector - Germicidal UV meters