For the municipality of the same name in Gloucester County, see Monroe Township, Gloucester County, New Jersey.
How to measure dissolved oxygen. Dissolved oxygen is measured using a dissolved oxygen meter. The best method is to take the measurement in the field at the same time each day because DO concentrations can vary throughout a 24 hour period.issolved oxygen (DO) is a measure of the quantity of free oxygen molecules in water.
Section Overview. 1  What is Dissolved Oxygen. 2  Dissolved Oxygen and Aquatic Life. 3  Where Does Dissolved Oxygen Come From.  Dissolved Oxygen 1  Saturation. Typical Dissolved Oxygen Levels.  Consequences of Unusual Dissolved Oxygen 1  Levels. Dissolved Oxygen and Water Column Stratification.  Dissolved Oxygen Units of Measurement.