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. 2021 Oct 7;11:19970. doi: 10.1038/s41598-021-99431-5

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Schematic, dose response and exposure characterization of the proposed UVC decontamination device. (A) Schematic of the operational germicidal device. The UVC germicidal device comprises a conveyor belt which is scalable. (B) Real image of the prototype germicidal device. (C) Changes to the dose response curve as a response belt speed. Total dose changes in response to the conveyor belt speed and exposure time. (D) Schematic of the experimental setup lamp and surface positioning. The germicidal lamp bulbs contain 3.8 cm between them and the distance from the lamp to the surface is 15.2 cm. Exposure changes as a result of positioning was monitored. (E) Exposure profile of the lamp based on the surface placement as indicated in (D). The UVC 254 nm detector was placed in positions 1 cm apart, covering a total distance of 7 cm. Measurements were taken at 3 min at each time point after initial lamp warm up.