Annex 8. Choosing a radiometer for measurement of ultraviolet C irradiation
The manufacturer’s specifications should be checked to determine whether the radiometer has the appropriate characteristics for wavelength, irradiance measurement and accuracy, based on the ultraviolet C (UVC) source being used (1)
Wavelength range
The radiometer chosen should be able to measure wavelengths of 220–280 nm with a peak response at 254 nm for standard UVC254 low-pressure mercury lamps.



