With all the new developments in the industry, it sure feels like GUV technologies and the related issues are evolving at Einstein’s cosmological constant, c – aka, the speed of light (pun intended). This makes it harder to keep up with cutting-edge developments and makes communication all the more critical. Once we start communicating, we need to collaborate, consolidate and … [Read more...] about Focus on Healthcare/UV Disinfection: Communicate, Collaborate, Consolidate and Educate: C3E
Measurement
Measurement and Characterization of Fluence in a Pilot-Scale UV Conveyor with Monochromatic and Polychromatic Light Sources
By Dylan Gleason, Vladimir Popović and Tatiana Koutchma, Agriculture and Agri-Food Canada, Guelph Research and Development Center A custom-built ultraviolet (UV) light conveyor system was developed for the treatment of solid food samples in pilot scale (Figures 1 and 2) (Ag Growth International Inc.; Georgetown, PE). The system was designed to support four sets of … [Read more...] about Measurement and Characterization of Fluence in a Pilot-Scale UV Conveyor with Monochromatic and Polychromatic Light Sources
Exploring the Full Spectrum of UV-C Radiation: Analysis of Biocidal Potential from Far UV-C to UV-B Boundary Frequencies
Amodeo D.1, De Palma I.1, Papale G.2, Nante N.2, Puccio A.2, Cevenini G.1, Messina G.2 1. Department of Medical Biotechnologies, University of Siena, Siena, Italy 2. Department of Molecular and Developmental Medicine, University of Siena, Siena, Italy Ultraviolet C (UV-C) radiation, particularly in the peak wavelength range of 260 to 265 nm, is remarkably effective in … [Read more...] about Exploring the Full Spectrum of UV-C Radiation: Analysis of Biocidal Potential from Far UV-C to UV-B Boundary Frequencies
UV LEDs: Investigating Into and Beyond the Datasheets
By Pratibha Sharma, Ph.D., director of Applications Research and Development; Saya Han, sales director; and Peter Chung, marketing, Violumas Ultraviolet (UV) light has been proven to enable many innovative applications in the curing 1 and disinfection space. 2 The UV-C region, spanning between 200 nm and 280 nm, specifically has garnered immense attention due to proven … [Read more...] about UV LEDs: Investigating Into and Beyond the Datasheets
A Rapid Read-Out Biological Indicator Subsystem for UV-C and Far UV Disinfection Assurance: Part 2
Originally written by Dr. Eugene I. Gordon Ph.D., IEEE Fellow and Edison Medal Recipient, and Peter E. Gordon MSEE, in April 2012. Updated in July 2023 by Peter E. Gordon for the benefit of the UV-C and Far UV solution design and global user community. Provisional Patent has been filed. Editor’s Note: Part 1 was published in Issue 3 2023 of UV Solutions, … [Read more...] about A Rapid Read-Out Biological Indicator Subsystem for UV-C and Far UV Disinfection Assurance: Part 2
Measurement of the Output of UV LEDs and Kr-Cl Excimer Lamps with Chemical Actinometer
By Lianfeng Zhang, Laboratory of Ecology and Environmental Protection, Research Institute of Tsinghua University When measuring the output of UV LEDs in a photoelectric radiometer, the probe matched to the specific UV LED wavelength is required. The measurement result of the radiometer is the irradiance of the irradiated point. An understanding of the radiation model … [Read more...] about Measurement of the Output of UV LEDs and Kr-Cl Excimer Lamps with Chemical Actinometer
New Optical Metrology and Documentary Standards for GUV Radiation Sources
By C. Cameron Miller, NIST, Yuqin Zong, NIST, and Jeff Hulett, Vektrex Measurement science and technology, documentary standards and transfer standard artifacts are the backbone of a functioning, viable economy. Measurements underpin trade, allowing parties to exchange goods for currency and to interchange functionally similar items. Accurate measurements greatly benefit goods … [Read more...] about New Optical Metrology and Documentary Standards for GUV Radiation Sources
Innovation Column: A Portable Device to Measure Hydroxyl Radical Scavenging Capacity in Water Samples
Liz Stevens, writer, UV Solutions A collaboration among Dr. Chengjin Wang of the University of Manitoba, Professor Ronald Hofmann of the University of Toronto, and Erik Rosenfeldt of Hazen and Sawyer has resulted in the creation of a new method to measure the hydroxyl radical scavenging capacity of water awaiting treatment. This parameter can be used to inform the control and … [Read more...] about Innovation Column: A Portable Device to Measure Hydroxyl Radical Scavenging Capacity in Water Samples
Common Sens-or Practical Approach to a UV-C Sensing Challenge
By Greg McKee, Chief Technologist / Product Marketing Manager, Labsphere, Inc. During the height of the coronavirus pandemic, governmental guidance was provided to reduce false claims and improve confidence in the effectiveness of UV disinfection devices and sources. The US FDA classifies general hospital and personal use devices as Class II UV radiation chamber disinfection … [Read more...] about Common Sens-or Practical Approach to a UV-C Sensing Challenge
Geometrical Limits for UV-C Inactivation of Pathogens
By Jaime Quintanaa, Antonio A. Fernández-Balbuenaa, Juan Carlos Martínez-Antóna, Daniel Vázqueza, Luis Pradab, Luis Estradab, Javier Aldaa* a. Applied Optics Complutense Group, University Complutense of Madrid, Av. Arcos de Jalón, 118, 28037 Madrid, Spain b. Luminalia Ingenieria y Fabricación, P.I. de Granda, Siero, 33199 Asturias, Spain * corresponding author The … [Read more...] about Geometrical Limits for UV-C Inactivation of Pathogens