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. 4  Dissolved Oxygen Saturation. 5  Typical Dissolved Oxygen Levels. 6  Consequences of Unusual Dissolved Oxygen Levels. 7  Dissolved Oxygen and Water Column Stratification. 8  Dissolved Oxygen Units of Measurement.