This document provides a history and overview of optical dissolved oxygen measurement techniques. It discusses:
- Traditional Winkler titration and electrochemical methods for measuring dissolved oxygen.
- The development of optical dissolved oxygen measurement using luminescence lifetime, which was optimized for environmental monitoring in 2006.
- The advantages of optical sensors over electrochemical sensors, including longer lifetime, greater stability, and suitability for high fouling environments.
- Details of optical sensor operation, calibration procedures, accuracy, certifications, and some example deployment applications.