Low-Cost RGB-LED photometric device for real-time dissolved oxygen and turbidity monitoring in wastewater (#2369)
Read ArticleDate of Conference
July 15-17, 2026
Published In
"Engineering without Borders: Artificial Intelligence, Knowledge, Innovation, and Alliances for a Future from the Americas"
Location of Conference
Santiago (Chile)
Authors
Benites-Rodriguez, Joseph
Pascual-Panduro, Paolo
Grados-Gamarra, Juan
Damas-Flores, Carlos
Castro-Vidal, Raul
Tabacchi-Murillo, Jesus
Ramos-Palacios, Wilder
Abstract
This research presents the design, implementation and experimental validation of a low-cost photometric device for real-time monitoring of dissolved oxygen concentration and turbidity in wastewater. The system integrates an RGB-LED illumination module with an LDR GL5528 sensor and a PIC18F4550 microcontroller. A total of 60 experimental measurements demonstrate dissolved oxygen values of 0.0052±0.0008 mg/L (Sample A, n=30) and 0.0058±0.0007 mg/L (Sample B, n=30) with average errors below 10%. The calibration curve (n=60 samples) yielded R² = 0.9847, validating the system's accuracy.