Feasibility study of UV intensity monitoring in water disinfection systems using reverse-biased LED photometers

D. Pousty*, Y. Gerchman, H. Mamane

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Common ultraviolet (UV) photodiodes or detectors for measuring the intensity of UV-light-emitting diodes (LEDs) in UV disinfection systems are costly. This study explores the potential of using low-cost UV-LEDs as photometers for monitoring UV intensity in water systems. Reverse LEDs (rLEDs) generate a small current proportional to the incident light intensity on the p-n junction when operated in unbiased mode. rLEDs with different wavelengths and power levels were examined to find the optimal rLED for monitoring the intensity of a 275 nm LED strip, achieving less than 1% deviation from a calibrated spectroradiometer. The influence of temperature was also examined on rLED measurements and found non-negligible. This work demonstrates the feasibility of using rLEDs as intensity monitoring sensors for UV-C LED sources, offering a low-cost and reliable alternative for UV intensity monitoring in UV-LED water disinfection systems.

Original languageEnglish
Pages (from-to)2407-2415
Number of pages9
JournalEnergy Advances
Volume3
Issue number9
DOIs
StatePublished - 19 Aug 2024

Funding

FundersFunder number
Asper Clean Water Fund
Canada–Israel
Tel Aviv University

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