Professor J.P. Malley, Jr., UV Solutions editor-in-chief C. Bernardy, graduate research engineer, University of New Hampshire M. White, graduate research engineer, University of New Hampshire A. Hidrovo, graduate research engineer, University of New Hampshire There are many instances and reasons why the percent UV transmittance (%UVT) of the water entering a UV system is … [Read more...] about When Influent Water Percent UVT is Out of Range
Measurement
Why is There No Standard Unit Similar to Lighting Products for Radiant Output of UV Lamps?
R.W. Stowe UV applications engineering consultant, Heraeus Noblelight America LLC The visible portion of the output (luminous flux) of lamps used for illumination is expressed in lumens, a measure of the total quantity of visible light emitted by a source. This is possible because the output is measured only in the wavelength response range of the human eye. This response … [Read more...] about Why is There No Standard Unit Similar to Lighting Products for Radiant Output of UV Lamps?
Summary: UV-C LED Device Spectrometer and Radiometer Protocol Round Robin Results
Kari Sholtes P.E. University of Colorado Boulder, Linden Research Group Karl Linden Ph.D. University of Colorado Boulder, Linden Research Group The development of a protocol to measure the peak wavelength, spectral emission and irradiance of deep ultraviolet light emitting diode (UV-C LED) devices was initiated in 2015 to standardize methods of analysis and reporting. This … [Read more...] about Summary: UV-C LED Device Spectrometer and Radiometer Protocol Round Robin Results
Total UV Power from an Irradiance Measurement – Correcting the Keitz Equation
Stephen W. Jaworowicz Process Engineer, Light Sources, Inc. Ultraviolet (UV) lamps are an important part of water treatment plants worldwide. Daily, millions of gallons of water are made safe by using UV to inactivate microbial pathogens. In designing an effective UV water treatment unit, it is necessary to know the total UV power emanating from the lamp. Determining the … [Read more...] about Total UV Power from an Irradiance Measurement – Correcting the Keitz Equation
Protocol to Determine Radiant Power Output and Fluence in UV LED Systems
Ataollah Kheyrandish Department of Chemical and Biological Engineering, University of British Columbia, Vancouver, Canada Madjid Mohseni Department of Chemical and Biological Engineering, University of British Columbia, Vancouver, Canada Fariborz Taghipour Department of Chemical and Biological Engineering, University of British Columbia, Vancouver, Canada A robust, … [Read more...] about Protocol to Determine Radiant Power Output and Fluence in UV LED Systems