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.
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
|Model||Image||Spectral function||Wavelength range / nm||Entrance optic||Typical range min. (NEI)||Typical range max.||Remark|
|X1-1-UV-3725||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||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||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||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.
|Model||Image||Entrance optic||Wavelength range / nm||Optical Bandwidth||Measurement range - min||Measurement range - max||Remark|
|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||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||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.|