UV irradiation is an effective method of killing a broad range of microbes. In essence, the UV radiation breaks the molecular bonds in the organism’s DNA. The most effective wavelength for accomplishing this is 263nm; however, the very intense 254nm output from low pressure Hg lamps is also very effective, as well as broader spectral output from medium pressure UV lamps.

International Light Germicidal Radiometers use solar blind vacuum photodiodes and filters with band passes in accordance with the IES Luckiesh and DIN standards.

The IL1770 and IL1470 germicidal radiometers use ACT5 filters to provide direct measurement of Effective Germicidal Radiation.

The lower cost IL1771 and IL1471 germicidal radiometers provide a cost effective method of measuring germicidal effectiveness in systems using low pressure Hg lamps. In these systems as 95% of the UV radiation is produced at 254nm, there is no need for the ACT5 filter.

XRL140T254 - Low Profile Germicidal Detector for use with our germicidal systems. Measurement range is 249 nm to 259 nm with 254 nm peak.

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