By Dan Scharpf, Ph.D., Chief Technologist, Labsphere, Inc. Ultraviolet Germicidal Irradiation (UVGI) is a proven method of disinfection for both bacterial and viral pathogens. To ensure germicidal efficacy is achieved, UV-C light sources need accurate characterization of irradiance (optical power over a given area) and dose (irradiance x time). Knowing the limitations of the … [Read more...] about Uncertainty in UV-C Sensor Calibration
Testing
Focus on Water: UV Technology and One Water Research Around the Globe
IUVA One Water Castine A. Bernardy, Ph.D. CDM Smith James P. Malley Jr., Ph.D., Editor-in-Chief, UV Solutions, University of New Hampshire In a snapshot of the UV technology global market, The Business Research Company reports that the UV light disinfection market is projected to continue its strong growth, reaching $6.66 billion in 2028 at a compound annual growth rate … [Read more...] about Focus on Water: UV Technology and One Water Research Around the Globe
Future Disinfection of Touchscreens by Far UV-C LEDs: A Feasibility Study
By Ben Sicks, Oksana Gurow and Martin Hessling, Institute of Medical Engineering and Mechatronics of Ulm University of Applied Sciences With the global trend towards digitalization, the application of touchscreens also is increasing in all areas of life. 1 This includes everyday situations, such as public ticket machines, but also in medical facilities such as hospitals, 2 and … [Read more...] about Future Disinfection of Touchscreens by Far UV-C LEDs: A Feasibility Study
Measuring Hydroxyl Radical Scavenging in UV AOP
By Olya Keen, University of North Carolina at Charlotte, and Laith Furatian, Abbotsford-Mission Water and Sewer Services UV-based advanced oxidation processes (AOPs) are relatively energy intensive compared to conventional water treatment, consuming on the order of 0.1 to 1.0 kWh/m3. 1 Thus, a rational design basis is important to avoid overdesign of AOP systems. Role of … [Read more...] about Measuring Hydroxyl Radical Scavenging in UV AOP
Ultraviolet and Electron Beam as Applied to Cannabis
By Liz Stevens, writer, UV Solutions The use of Cannabis sativa L., whether the industrial hemp variety, the medical variety or the recreational variety, is on the rise. Revenue in the US from cannabis sales is projected to reach nearly $42B in 2024, with significant growth expected in the years to come. While it still is a Schedule I illegal substance under federal law, the … [Read more...] about Ultraviolet and Electron Beam as Applied to Cannabis
Digital UV Sensors Simplify Measurement and Control
By Tilman Weiss, sglux, and Fred Perry, Boston Electronics Irradiance is the term for the optical energy falling on a surface in units of watts per unit area. In the measurement and control of light for purposes of disinfecting or curing a surface or a volume, usually not only the total optical energy but more specifically the energy within a defined spectral interval is … [Read more...] about Digital UV Sensors Simplify Measurement and Control
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 1
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. The utility of biodosimetry in the water treatment space has been well documented since the … [Read more...] about A Rapid Read-Out Biological Indicator Subsystem for UV-C and Far UV Disinfection Assurance: Part 1
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
Focus on Food and Beverage Safety | Introducing UV Technology into the Fresh Fruit and Vegetable Sector
IUVA Food and Beverage Safety Working Group Keith Warriner, professor, Department of Food Science, University of Guelph Fresh fruit and vegetables such as soft fruit, melons, tomatoes and leafy greens have been implicated in the highest number of foodborne illness outbreaks amongst the food commodity groups. In the case of leafy greens, there have been 18 outbreaks in the … [Read more...] about Focus on Food and Beverage Safety | Introducing UV Technology into the Fresh Fruit and Vegetable Sector
